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The Journal of Pediatrics

○ Elsevier BV

Preprints posted in the last 30 days, ranked by how well they match The Journal of Pediatrics's content profile, based on 16 papers previously published here. The average preprint has a 0.02% match score for this journal, so anything above that is already an above-average fit.

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Factors Associated with Predischarge Morbidity and Mortality in Small for Gestational Age Infants: A Single-Center Retrospective Cohort Study

Cinkus-Rios, C.; Pickell, S.; Thompson, C.; Bomback, M.; Lyford, A.; Hays, T.

2026-10-09 pediatrics 10.64898/2026.10.07.26364995 medRxiv
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Objective: To identify factors associated with predischarge morbidity and mortality among small for gestational age infants. Study Design: We conducted a retrospective single-center cohort study of small for gestational age infants admitted to a level IV neonatal intensive care unit. We determined the association of clinical characteristics, congenital anomalies, and genetic disorders with the primary outcome of predischarge morbidity or mortality and characterized morbidity and mortality across congenital anomaly subgroups. Results: Among 293 small for gestational age infants, 18 (6.1%) had a genetic disorder and 103 (35.2%) had a major congenital anomaly, with congenital heart disease (CHD) representing the largest subgroup. The primary outcome of morbidity or mortality occurred in 93 infants (31.7%); 74 infants (25.3%) experienced morbidity and 19 (6.5%) died. CHD (adjusted odds ratio [aOR]: 16.5, 95% CI 6.44-45.7) and multiple congenital anomalies (aOR: 17.8, 95% CI 4.64-71.1) were found to be strongly associated with morbidity or mortality, after accounting for sex, maternal race, and intubation > 7 days. Statistically significant associations were also found with the presence of musculoskeletal anomalies as well as genetic disorders in infants without congenital anomalies, though in limited sample sizes. CHD was the largest contributor to morbidity, whereas multiple congenital anomalies accounted for the greatest proportion of mortality. Infants with abdominal wall defects and central nervous system anomalies experienced no morbidity or mortality. Conclusion: Congenital heart disease and multiple congenital anomalies were strongly associated with morbidity and mortality among SGA infants, whereas the degree of SGA alone was not. These findings suggest that risk is not explained by the degree of SGA alone and may be more strongly associated with congenital disease and other underlying factors.

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A comparison of mortality for neonates aged 35 versus 36 weeks gestational age with hypoxic-ischemic encephalopathy treated with therapeutic hypothermia in the National Inpatient Sample.

Khan, J. Y.; Groh, J. M.; Dookeran, K. A.

2026-10-21 pediatrics 10.64898/2026.10.19.26365848 medRxiv
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Objectives: Using a nationally representative database of U.S. hospitalizations, we aimed to (1) characterize contemporary trends in hypoxic-ischemic encephalopathy (HIE) prevalence by severity, therapeutic hypothermia (TH) utilization, and associated in-hospital mortality; and (2) examine the association between TH and mortality by HIE severity and gestational age (GA), focusing on 35- and 36-weeks GA. Methods: We analyzed newborn hospitalizations from the National Inpatient Sample, 2016-2023. Unspecified, mild, moderate, and severe HIE were identified using ICD-10-CM diagnosis codes P91.60-P91.63; and 35- and 36-weeks GA using codes P07.38-P07.39. TH was identified using ICD-10-PCS codes 6A4Z0ZZ and 6A4Z1ZZ. Survey-weighted multivariable generalized linear models with marginal standardization were used to estimate adjusted mortality risk differences (RD) with surprisal (S) values, and assess whether associations between TH and mortality differed by HIE severity across GA strata. Results: Among 29,767,238 hospital discharges, HIE was identified in 66,535 neonates (2.24 per 1,000), and TH used in 19.2% of HIE cases. In-hospital mortality was 9.74% among all HIE cases and 6.65% among TH-treated neonates. From 2016-23, HIE prevalence nearly doubled (1.58 to 3.01 per 1,000; p-for-trend <0.001) and TH utilization more than doubled (0.33 to 0.74 per 1,000; p-for-trend <0.001), while TH use as a proportion of HIE remained stable (17.8%-20.8%; p-for-trend=0.39). HIE severity distribution was: mild (15%), moderate (29.4%), severe (18.3%), and unspecified (37.3%), with moderate HIE increasing over time (22.3%-33.5%). Crude mortality was consistently highest for severe HIE (range: 33.65%-35.25%). Among infants with severe HIE, TH was associated with reduced mortality overall (RD -10.12%; 95% CI -14.86, -5.39; p<0.001; S=15.12), and specifically at 36-weeks GA (RD -21.98%; 95% CI -35.85, -8.12; p=0.002; S=9.06), but not at 35-weeks (RD -1.83%; 95% CI -21.2, 17.55; p=0.86; S=0.22). Conclusions: TH was associated with mortality reduction in severe HIE overall and at 36-weeks GA, but this benefit remains uncertain at 35-weeks GA.

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Evolving clinical roles in the era of genomic medicine: Insights from rapid genome sequencing in the neonatal intensive care unit

Taber, P.; Solorzano, C.; Weaver, L.; Palmquist, R.; Butler, J.; Ellsworth, T.; Bolyard, M.; Tristani-Firouzi, M.; Estabrooks, P.; Malone Jenkins, S.

2026-09-29 genetic and genomic medicine 10.64898/2026.09.28.26363665 medRxiv
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Background: Rapid genome sequencing (rGS) is a first-tier test in the neonatal intensive care unit (NICU). Implementation strategies to scale rGS for clinical care may change clinician roles. We analyzed the NICU rGS workflow to understand challenges rGS poses for clinical roles and responsibilities. Methods: The study took a qualitative approach to understanding the rGS workflow in Level III and Level IV NICUs. The five workflow phases studied included: i) identification of a patient with a suspected genetic disorder, ii) subspecialist consultation, iii) test selection and ordering, iv) return of results, and v) disclosure. Data were collected via job task journals, interviews, and workflow diagram construction with clinicians involved in rGS. Analysis included participant-guided workflow diagram refinement, qualitative thematic analysis, and identification of rGS workflow challenges. Results: We documented issues related to decision-making authority and scope of responsibility for clinicians, with the majority relating to complexities of subspecialist consultations. Issues included differences in: criteria for triggering consultations, expectations of consulted subspecialists' roles, test selection preferences, and responsibility for documenting clinical interpretations and disclosure. Conclusion: Subspecialist consultations in clinical rGS involved significant role ambiguity and communication challenges, requiring intentional implementation efforts to ensure clear clinical roles and responsibilities.

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A Synbiotic Infant Formula Promotes Balanced Immune-Microbiome Interactions in Term Infants: A Randomized Controlled Trial

Chen, Q.; Chung, C. K.; Capeding, M. R. Z.; Trinidad-Aseron, M.; Tenorio-Quinones, V. M. R.; Barcenilla, H.; Gonzalez, L.; Johnsson, A.; Darwish, N.; Li, H.; Rasmussen, J. A.; Moll, J. M.; Stauch, W.; Schwenk, J.; Lakshmikanth, T.; Sprenger, N.; Hays, N. P.; Noti, M.; Brodin, P.

2026-10-07 pediatrics 10.64898/2026.10.05.26364773 medRxiv
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Formula-fed infants have altered gut microbiota and immune development relative to breastfed infants. Human milk oligosaccharides (HMOs) and microbes able to ferment these, like Bifidobacterium infantis, promote healthy immune-microbiome interactions in breastfed infants. In this randomized trial, 240 healthy term infants in the Philippines received a synbiotic blend formula (SynF; seven HMOs, bovine milk oligosaccharides, and B. infantis LMG11588) or control formula (CtrlF) for 6 months. SynF supported growth non-inferior to CtrlF and near universal B. infantis colonization (vs <10% in CtrlF). Markers of intestinal inflammation were lower in children fed SynF while secretory IgA was higher. SynF fed infants showed lower markers of systemic inflammation in plasma, slower immune cell maturation, and fewer upper respiratory tract infections (URTI) during their first 6 months of life. These findings suggest that synbiotic formula can dampen inflammatory responses to colonizing microbes and mild infections in fully formula-fed, term infants. Trial registration: NCT06073652.

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Long term Follow-up of the TREOCAPA (Prophylactic TREatment Of the duCtus Arteriosus in Preterm infants by Acetaminophen) Study (TREOCAPA-LT): protocol and statistical analysis plan

Morgan, A. S.; Roze, J.-C.; Ursino, M.; Alberti, C.; Desplebin, V.; Durox, M.; Hankard, R.; Hamrit, M.; Johnson, S. J.; Kemper, R.; Marcon, Y.; Michel, M.; Zeitlin, J.; Cambonie, G.

2026-10-05 pediatrics 10.64898/2026.09.30.26364424 medRxiv
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Introduction: The TREOCAPA (Prophylactic TREatment Of the duCtus Arteriosus in Preterm infants by Acetaminophen) trial was a pan-European, multi-centre, phase II/III trial investigating the impact of prophylactic paracetamol (also known as acetaminophen) given during the first 5 days of life for children born before 29 weeks' gestational age (GA) on survival to 36 weeks' post-menstrual age without severe neonatal morbidities. However, due to time restrictions, long-term follow-up was not planned as part of the initial trial despite recommendations for neonatal trials to include endpoints measuring efficacy after discharge from the neonatal unit and on-going debate about the long-term effects of paracetamol in the neonatal period. This protocol describes a study to follow-up participants in the TREOCAPA trial at 2 years corrected age initiated after the trial's onset. Methods and analysis: The TREOCAPA Long Term (TREOCAPA-LT) study population consists of all children included in the TREOCAPA phase III trial in centres in countries participating in the follow-up study who are aged between 23.5 and 27.5 months corrected age during the study period. Families are contacted by the clinical teams and a parent or guardian is invited to complete an internet-based (online) questionnaire. The primary outcome is cognition, as measured by the non-verbal Cognitive Scale standard score from the Parent Report of Children's Abilities-Revised (PARCA-R) questionnaire. Secondary outcomes are moderate to severe neurodevelopment, health service use and costs. Data will be analysed according to the study groups to which children were randomised in the original TREOCAPA RCT. Ethics and Dissemination: The TREOCAPA-LT protocol was first approved by ethics' committees in France (the study's sponsor) and subsequently by all participating countries. Results from TREOCAPA-LT will be published in open access journals in accordance with the funder's regulations. Registration: https://clinicaltrials.gov/study/NCT06064825

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Artificial Intelligence-Based Modeling to Aid in the Identification of Genetic Conditions in Infants with Congenital Heart Disease

Caiola, M.; Thompson, T.; Stephens, S. B.; Salamat, B.; Harris, K.; Lara, C.; Coban-Akdemir, Z.; Zhang, L.; Roth, M.; Milosavljevic, A.; Weitz, A. C.; Morris, S. A.

2026-10-13 pediatrics 10.64898/2026.10.12.26365328 medRxiv
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Background: Genetic conditions are common in congenital heart disease (CHD) and affect care, but are often missed or diagnosed late. We asked whether routine clinical data can shortlist the most likely genetic conditions. Methods: Retrospective single-center cohort of children with CHD and an echocardiogram who had either a confirmed genetic diagnosis or negative cytogenetic testing and CHD gene sequencing. Echocardiogram images and serial medical record data were added as model inputs in the order they become clinically available. Class balanced logistic regression (LR) and a multimodal deep learning fusion network were fitted to the same inputs at each step. The primary metric was balanced top-3 accuracy (correct diagnosis among the top three, averaged across conditions), with bootstrap intervals. Results: The cohort included 1,720 children (988 with common CHD-associated genetic conditions, 231 rare diagnoses, 501 negative testing). Using only inputs generated at the echocardiogram visit, LR reached a balanced top-3 accuracy 0.758 (chance 0.429). Serial records, radiology notes and ICD-10 codes, raised this to 0.809. Multimodal fusion performed similarly at each stage. With a genetic condition withheld from training, the fusion embedding placed affected children nearest to others sharing a gene group in 0.37 of cases versus 0.10 without the embedding (+0.268 [95% CI +0.242, +0.295]). Conclusions: Routine clinical data available at first echocardiogram can help identify likely genetic diagnoses, and later coded inputs ceiling. Multimodal fusion added no accuracy over LR, but places children sharing a genetic cause near one another, making nearest-neighbor retrieval informative for undiagnosed children.

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Diagnostic Accuracy of WHO IMCI Visual Inspection for Neonatal Jaundice: A Prospective Multi-Country Cohort

Khan, A.; Shapiro, A.; Yazdani, N. S.; Abraham, S. G.; Akelo, V.; Asante, K. P.; Aweyo, F.; Cherian, A. G.; Jat, M.; Jehan, F.; K, I.; Kasadhe, K.; Kasaro, M.; Lee, A. C.; Mazhar, A.; Mazumder, S.; Mores, C.; Mutale, W.; Mwape, H.; Newton, S.; Nisar, M. I.; Ogala, L.; Ogola, N.; Sharma, N.; Spelke, M. B.; Sugirtha, J.; Wei, Y.; Yang, W.-C.; Hoodbhoy, Z.; Pan, Q.; Smith, E. R.

2026-09-22 public and global health 10.64898/2026.09.16.26362263 medRxiv
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BACKGROUND: Adverse consequences of neonatal hyperbilirubinemia disproportionately affect babies in low- and middle-income countries. Laboratory measurement of total serum bilirubin is limited in low-resource settings, necessitating simpler alternatives. Our study aimed to evaluate the diagnostic accuracy of visual inspection of jaundice via the World Health Organization Integrated Management of Childhood Illnesses algorithm compared to transcutaneous bilirubinometry for the identification of hyperbilirubinemia in community settings. METHODS: Hyperbilirubinemia was assessed by visual inspection for jaundice and transcutaneous bilirubinometry at 0-72 hours, 3-5 days, and 5-14 days postnatal in the PRISMA prospective cohort study in six sites in Asia and Africa. We assessed sensitivity, specificity, and positive and negative percent agreement. RESULTS: We analyzed data from 14,331 infants, including 1,852 preterm infants. 15% had hyperbilirubinemia, as defined by transcutaneous bilirubin values and the NICE nomograms, at 3-5 days postnatal. Visual inspection had a sensitivity of 16%, specificity of 96%, positive percent agreement of 56%, and negative percent agreement of 86% at 3-5 days postnatal age, pooled across all sites and gestational ages, versus transcutaneous bilirubin defined by NICE nomograms. CONCLUSION: The poor sensitivity of visual inspection underscores an urgent need for accurate, affordable screening tools to improve screening for hyperbilirubinemia.

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Buccal DNA Methylation-Derived EpiScores are Associated with Neonatal Morbidity Burden in Infants born Very Preterm

Patel, P.; Zhu, S.; Sehgal, N.; Camerota, M.; Carter, B.; Check, J.; Helderman, J.; Hofheimer, J.; Litt, J.; McGowan, E.; Neal, C.; Pastyrnak, S.; Smith, L.; O'Shea, M.; Marsit, C.; Lester, B. M.; Everson, T.

2026-09-27 pediatrics 10.64898/2026.09.25.26363955 medRxiv
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Background: Infants <30 weeks gestational age (very preterm (VPT)), are at risk of experiencing multiple serious neonatal morbidities. These morbidities impart serious biological stress, which may be reflected in dysregulated protein expression even after the morbidities have resolved. Recent studies suggest that DNA methylation-based predictors of circulating proteins may reflect the molecular effects of neonatal adversity. The objective of this study is to examine associations between DNA methylation-derived EpiScores, which are externally trained methylation signatures that proxy circulating protein levels, and neonatal morbidity burden in children born VPT. Buccal DNA methylation was obtained at NICU discharge in 537 infants from the NOVI cohort. A total of 111 EpiScores were calculated and tested for association with multimorbidity (0-1 vs. [&ge;] 2 morbidities) using adjusted linear regression models. Cross-tissue analyses in an external paired blood-buccal dataset (n=21) were used to identify EpiScores with moderate-to-strong correlations across tissues. Results: Eighteen EpiScores were nominally associated with multimorbidity (p < 0.05), with Melanoma-derived growth regulatory protein (MIA) with FDR < 0.05 (beta = 0.0023, p = 0.0004). In cross-tissue analyses, 35 EpiScores yielded r > 0.50 (p<0.05), 11 of which showed nominal associations with multimorbidity, including MIA. Overall, the morbidity-associated EpiScores reflected immune, inflammatory, metabolic, and growth-related pathways. Conclusions: Buccal DNA methylation-derived EpiScores capture biological signatures associated with neonatal morbidity burden in very preterm infants.

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Heating On Transport WitH prEtErm and Low birth weight infants using servocontrol thermoregulation (HOTWHEELS): study protocol for a randomised controlled trial.

Chaudhary, V.; Watson, T.; Lee, M.; Ilagan, N.; Hodgson, G.; Wilson, A.; Batta, V.; Gardiner, J.; Cooper, M.; Davis, J. W.

2026-09-30 pediatrics 10.64898/2026.09.29.26364248 medRxiv
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Background Temperature instability during neonatal transport contributes to adverse outcomes in preterm and low birth weight infants. Hypothermia in this population is associated with increased risk of intraventricular haemorrhage (IVH), sepsis, and death. Current transport temperature management is reactive and manually controlled. The Heating On Transport WitH prEtErm and Low birth weight neonates using Servocontrol patient temperature management system (HOTWHEELS) trial aims to determine whether automated, servo-controlled thermoregulation provides superior thermal stability compared to standard care and reduces hypothermia-associated adverse outcomes. Methods This prospective, randomised, superiority trial is conducted by the Newborn Emergency Transport Service of Western Australia. Infants with a gestational age of less than or equal to 34 weeks and/or weight of 1500 g requiring transport are randomised to serve-controlled or standard thermal care. The primary outcome is the proportion of infants with a temperature between 36.5 and 37.5 degrees Celsius on arrival at the receiving neonatal unit. Secondary outcomes include the incidence of IVH in the first 7 days, mortality before discharge, the incidence of moderate (<36.0) and severe (<35.0) hypothermia for greater than 15 minutes and the temperature change during transport. Trial registration: ANZCTR12624000503527. Impact HOTWHEELS is the first randomised trial in neonatal transport to evaluate servo-controlled temperature control. We believe the findings will inform standards of temperature control during transport for preterm and low birth weight infants.

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Clinicians Perspectives on Fighting the Ventilator

Olivier, L.; Madzhakova, D.; Lauterbach Oprea, C.; Stollenwerk, A.; Orlikowsky, T.; Schoberer, M.

2026-10-21 pediatrics 10.64898/2026.10.20.26365990 medRxiv
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Introduction: Fighting the ventilator (FV) is characterized by a patients active counteraction of respiratory gas flow across multiple breaths during mechanical ventilation. An effective ventilation is prevented during such episodes. The objective of this exploratory study was to evaluate clinicians knowledge, perception and agreement regarding this condition. Methods: In a cross-sectional online survey, medical professionals with experience in intensive care medicine (mostly neonatal and pediatric patients) responded to 11 questions covering various clinical aspects of FV. Results: All respondents were familiar with the phenomenon and assessed it to be clinically relevant. Neonates were perceived to be predominantly affected. Promoting factors of FV included inadequate sedation and ventilation-associated factors. In clinical practice, the participants identified FV by clinical evaluation, analysis of ventilator waveforms and capnography and used both pharmacological and non-pharmacological intervention strategies. There was no consensus concerning the English terminology of the condition. Only few respondents were familiar with local guidelines to manage FV. Conclusion: Although there was consensus on the relevance of FV, diagnostics and management strategies were highly heterogeneous. Many participants agreed that poor patient-ventilator synchrony was an important cause of FV. Future work should focus on characterizing and generating evidence on FV.

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Uptake, reidentification and regret in pediatric gender care

Tollit, M. A.; Conabere, W.; Gray, K.; Sibley, C.; Ayub, I.; Pace, C. C.; Traill, A.; Russo-Batterham, T.; Cavve, B. S.; Ravipati, T.; Rayner, C.; Pang, K. C.

2026-09-24 pediatrics 10.64898/2026.09.17.26363359 medRxiv
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Background: Gender-affirming medical care (GAMC) for children and adolescents in Australia has become increasingly politicized, despite care being provided in accordance with latest evidence-based international guidelines. Critics of GAMC claim that current assessment and deliberation processes are insufficient, and that too many young people are accessing medical interventions, no longer identifying as trans, and expressing treatment regret. These claims have led to widespread bans on the provision of paediatric GAMC, despite growing evidence regarding harms caused by such bans. Aim: This study sought to describe the care journeys of the young people attending Australia's largest paediatric gender service, with a focus on reporting the rates at which young people commenced medical interventions, re-identified with their birth-assigned sex, and expressed regret about their treatment. Methods: The Royal Children's Hospital Gender Service (RCHGS) is a statewide service that provides individualised multidisciplinary care to trans and gender diverse young people in Victoria, Australia. An initial extended triage appointment explores the needs and goals of the young person and their family. Some proceed to receive individualised multidisciplinary care (MDC) at RCHGS which can include psychosocial assessment and management, family support, and medical interventions including pubertal suppression (PS) and gender-affirming hormonal therapy (GAHT). We undertook a retrospective file audit of all patients who had attended at least one RCHGS appointment and been discharged between 1/1/2017-31/12/2024. For each person, key data were extracted from their electronic medical record and recorded in REDCap. Results: 1,391 patients were discharged over the 8-year study period and many different care trajectories were observed. 814 (58.5%) did not access ongoing MDC. Of the remaining 577, 353 (25.4% of total cohort) started a medical intervention ((PS: n=64/1391 (4.6%); estradiol: n=97/1391 (7.0%); testosterone: n=244/1391 (17.5%)). For those who started these medical interventions, the median duration and number of sessions from first appointment until commencement of medications was 530 (IQR: 371-693) days and 9 (IQR: 7-13) sessions. 346 of these patients (98.0%) had data on gender identity at discharge and subsequent care pathways. 7 (2.0%) re-identified with their birth-registered sex and stopped treatment: 4 did so after commencing PS (4/61=6.6% of those starting PS), 2 did so after commencing testosterone, and 1 did so after commencing estradiol (3/341=0.9% of those starting GAHT). Just one of these patients, who had been on estradiol for 1 month, expressed treatment regret given concerns about initial breast budding and future fertility. Conclusion: This study highlights varied trajectories of those referred to paediatric gender services, directly challenges claims used to justify restrictions on paediatric GAMC and underscores the importance of a person-centred approach to care.

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The cry as a vital sign: A smartphone based study protocol of neonatal cry acoustics in hypoxic ischemic encephalopathy

Chakraborty, D.

2026-10-14 pediatrics 10.64898/2026.10.12.26365334 medRxiv
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Background. Many Indian special newborn care units (SNCUs) cannot offer amplitude-integrated EEG (aEEG) or early MRI, so bedside judgement decides which newborns receive closer neurological attention. Earlier work found that asphyxiated newborns cry with a higher pitch and shorter phonation than healthy newborns, and a meta-analysis reported higher fundamental frequency, dysphonation and atypical melody in infants with neurological dysfunction, with wide differences between studies. Aim. To determine whether basic acoustic features of a smartphone-recorded pain cry (following a heel prick) can differentiate term newborns with HIE from control newborns. Also, to track changes in cry acoustics over the first 72 hours of life and evaluate their association with the clinical severity and short-term outcomes of encephalopathy. Design. A prospective, single centre diagnostic accuracy and cohort study in a tertiary SNCU. Three groups of term newborns are recorded: newborns with HIE, healthy comparators, and sick comparators who do not have HIE. Every newborn is recorded after the same stimulus, the first clinically indicated heel-prick. Newborns with HIE and sick comparators are recorded again at 24 hours, 72 hours and before discharge. A cry that is late or absent counts as a result and not as a missing value. Three clinicians blinded to group also classify the cries by listening, so the phone-based measures can be compared with the human ear. Analysis. The primary outcome is the area under the ROC curve of a logistic model with five pre-specified acoustic predictors. The target is 180 analyzable newborns (70 with HIE and 110 comparators). Reporting follows STARD and TRIPOD+AI. Relevance. In a South Asian trial, cooling did not reduce death or disability at 18 months and increased death alone. A cry tool in this setting is therefore proposed to help prioritize EEG, seizure surveillance, closer observation and referral. It is not proposed as a trigger for cooling. Keywords: neonatal encephalopathy; infant cry; acoustic analysis; smartphone; diagnostic accuracy; low-resource setting.

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Maternal Vitamin B12 Deficiency And Perinatal And Child Neurodevelopmental Outcomes: A Systematic Review And Meta-Analysis

Carvalho, E. R. B. d.; Sousa, H. K. P.; Siqueira, T. d. S.; Queiroz, R. R. d.; Silva, J. B. T. d.; Cavalcante, A. J. H.; Viana, P. L. V.; Magalhaes, M. E. A.; Fidencio, G. S.; Carvalho, A. R. B. d.

2026-10-09 pediatrics 10.64898/2026.10.07.26364974 medRxiv
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Background: Vitamin B12 is essential for one-carbon metabolism, deoxyribonucleic acid (DNA) synthesis, and myelination, and inadequate maternal status during pregnancy may influence fetal growth and child neurodevelopment. Objective: To evaluate the association between maternal vitamin B12 status and perinatal and child neurodevelopmental outcomes. Methods: We conducted a systematic review and meta-analysis of observational studies and randomized clinical trials. The main outcomes were preterm birth, low birth weight, small for gestational age (SGA), and cognitive/global development. For binary outcomes, the natural logarithm of the relative risk (logRR) was the primary analytical effect measure; for neurodevelopment, Hedges g was used. Random-effects models were fitted, between-study variance was estimated by restricted maximum likelihood (REML), and inference used Knapp-Hartung (KH) adjustment. Results: For preterm birth, nine estimates yielded a pooled logRR of 0.190 (95% confidence interval [95% CI] KH: -0.046 to 0.427; p = 0.101; I2 = 19.2%). For low birth weight, nine estimates yielded a pooled logRR of 0.136 (95% CI KH: -0.013 to 0.286; p = 0.069; I2 = 4.8%). For SGA, six estimates yielded a pooled logRR of 0.047 (95% CI KH: -0.083 to 0.177; p = 0.397; I2 = 0%). Cognitive/global development, assessed in five independent studies, showed a pooled Hedges g of 0.266 (95% CI KH: 0.034 to 0.499; p = 0.034; I2 = 55.7%). Conclusions: logRR estimates for preterm birth and low birth weight were directionally compatible with higher risk among mothers with lower vitamin B12 availability, but their 95% CIs included the null. No consistent association was observed for SGA. Higher maternal vitamin B12 availability or supplementation was associated with a small favorable effect on cognitive/global development, with moderate heterogeneity.

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Adiposity and the Prevalence, Incidence and Distribution of Refractive Errors in Urban Vietnamese Children

Ho, N. T.; Tran, K. P. M.

2026-09-23 pediatrics 10.64898/2026.09.17.26363286 medRxiv
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PurposeTo examine the association between BMI-for-age z-score (BAZ) and BMI status with refractive error prevalence, incidence, subtypes, and quantitative refraction in Vietnamese schoolchildren. MethodsWe retrospectively analyzed body mass index and refractive error data from annual school health checks in three Vietnamese cities, 2022 to 2024. The main analysis set was restricted to children age 6 and older (49,415 examinations, 31,522 children). Refractive error subtypes and quantitative refraction came from a Hanoi autorefractor sub-cohort (13,059 examinations). We used sex-stratified Poisson models with generalized estimating equations, adjusted for age, city, and year, plus linear mixed models for quantitative outcomes. ResultsAny refractive error followed a U shaped curve across BAZ in both sexes, significant in girls (prevalence ratio 1.01 per 1-SD BAZ, p = 0.027) but not boys (p = 0.099). Obesity was associated with higher any refractive error prevalence in girls (adjusted prevalence ratio 1.05, p = 0.017). Astigmatism was associated with BAZ in both sexes (p < 0.001), anisometropia in boys only (p < 0.001), with no association for myopia or hyperopia. Spherical equivalent shifted slightly toward hyperopia, not myopia, with higher BAZ. A supplementary check over 1 to 2 years found no evidence that prior BAZ predicted new refractive error onset (prevalence ratio 1.02, p > 0.6 in both sexes), and the nonlinear pattern did not reappear. ConclusionsAdiposity relates cross-sectionally to refractive error in a nonlinear, sex specific way concentrated in astigmatism and anisometropia rather than myopia, though this did not hold up short term.

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GC801-enabled AAV gene therapy in a neonate with Pompe disease

Chen, J.; Ma, W.; Qi, H.; Ma, X.; He, Y.; He, L.; Ke, Y.; Zhuang, L.; Jiang, X.; Wang, J.; Xu, J.; Xia, Y.; Zhou, J.; Wang, Y.; Dong, X.; Wu, X.; Feng, Z.

2026-09-29 genetic and genomic medicine 10.64898/2026.09.23.26363499 medRxiv
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We report a neonate with IOPD who had high pre-existing anti-AAV9 antibody titers, which precluded eligibility for AAV9-mediated gene therapy (GC301). Preconditioning with a single dose of the IgG-degrading enzyme GC801 (0.2 mg/kg) safely reduced serum IgG from 6.25 g/L to a nadir of 0.72 g/L within 5 days. This pharmacological window facilitated successful GC301 vector transduction, driving a robust increase in GAA activity to 19.38 mmol/L/16h by day 84. Crucially, no adverse events beyond the underlying IOPD were observed. Our findings support the potential utility of GC801 as an agent to overcome pre-existing humoral barriers in neonatal gene therapy candidates.

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Social Inequities in Healthcare Access Among U.S. Children With ADHD, Autism, and Co-occurring ADHD and Autism: Evidence From the 2023 to 2024 National Survey of Children's Health

Onwuameze, C. N.; Orji, G.; Bate, M. A.; Madu, V. O.; KAYA, P. B.; INALEGWU, J. E.

2026-10-06 public and global health 10.64898/2026.10.02.26364593 medRxiv
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Objective: To compare healthcare access among U.S. children with attention-deficit/hyperactivity disorder (ADHD) only, autism only, and co-occurring ADHD-autism, and to identify social inequities associated with unmet care using recent nationally representative data. Methods: We analyzed combined 2023-2024 National Survey of Childrens Health data for 13,576 children aged 3-17 years with current ADHD and/or autism. Six healthcare-access outcomes were examined: forgone healthcare, unmet mental health care, no medical home, coverage gap or inadequate insurance, unmet specialist care, and unmet care coordination. Survey-weighted modified Poisson regression estimated adjusted prevalence ratios (aPRs) and 95 percent confidence intervals (CIs). Six multiply imputed poverty measures were combined using Rubins rules. Sensitivity models additionally adjusted for functional difficulty. Results: Compared with ADHD only, co-occurring ADHD-autism was associated with higher prevalence of forgone healthcare (aPR, 1.73; 95 percent CI, 1.38-2.16), no medical home (1.11; 1.02-1.20), inadequate or discontinuous insurance (1.14; 1.03-1.28), unmet specialist care (1.49; 1.14-1.94), and unmet care coordination (1.15; 1.04-1.28). Autism only was associated with unmet mental health care (1.49; 1.13-1.97) and care coordination (1.13; 1.02-1.25). Food insufficiency, housing instability, and non-supportive neighborhood conditions were consistently associated with poorer access. After adjustment for functional difficulty, associations remained for co-occurring ADHD-autism with forgone and specialist care and for autism only with unmet mental health care. Conclusions: Healthcare access inequities differed by neurodevelopmental diagnostic group and social context. Pediatric systems should strengthen care coordination, specialty and mental health access, insurance continuity, family navigation, and responses to food and housing hardship. Keywords: attention-deficit/hyperactivity disorder; autism spectrum disorder; healthcare access; health disparities; social determinants of health

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Vitamin D Supplementation For The Prevention Of Respiratory Infections In Childhood: A Systematic Review And Meta-Analysis

Sousa, H. K. P.; Siqueira, T. d. S.; Oliveira, M. A. M. d. C.; Carvalho, E. R. B. d.; Cavalcante, A. J. H.; Silva, J. B. T. d.; Viana, P. L. V.; Fidencio, G. S.; Costa, V. C. S.; Arnaud, L. M. L. B.; Matos, A. P. V.; Barbosa, J. M. R.

2026-10-13 pediatrics 10.64898/2026.10.11.26365254 medRxiv
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Background: Vitamin D modulates innate and adaptive immunity and has been investigated for preventing pediatric respiratory infections. Objective: To assess the effects of vitamin D supplementation on respiratory tract infections (RTIs), including upper RTIs, lower RTIs/recurrent pneumonia, and hospitalization/clinical severity in children and adolescents. Methods: Systematic review and random-effects meta-analysis of 16 publications, of which 13 contributed to quantitative synthesis. Twenty-four effect estimates were pooled, eight per outcome. The odds ratio (OR) was analyzed on its natural logarithmic scale (logOR), using restricted maximum likelihood (REML) estimation and Knapp-Hartung (KH) adjusted inference. Where necessary, risk ratios (RRs), hazard ratios (HRs), and incidence rate ratios (IRRs) were approximated on the logOR scale. Results: For respiratory infection/upper RTI, pooled logOR was -0.284 (KH-adjusted 95% confidence interval [CI]: -0.678 to 0.110; OR 0.753; p = 0.132; I2 = 97.2%). For lower RTI/recurrent pneumonia, logOR was -0.445 (95% CI: -0.987 to 0.097; OR 0.641; p = 0.093; I2 = 89.5%). For hospitalization/clinical severity, logOR was -0.609 (95% CI: -1.134 to -0.083; OR 0.544; p = 0.029; I2 = 78.3%). Conclusions: Pooled estimates favored supplementation in direction for all three groups, although confidence intervals included the null for the first two. Heterogeneity was substantial, and the results are limited by approximations among effect measures, clinically diverse endpoints, and potentially correlated effects from individual studies.

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Risk factors for a low five-minute Apgar score at a provincial referral hospital in southern Mozambique: A secondary analysis of a matched case-control study

Maculuve, B. Z. I.; Fernandes, N.

2026-10-14 pediatrics 10.64898/2026.10.13.26365388 medRxiv
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Perinatal asphyxia is a leading cause of neonatal death in Mozambique and the main cause of early neonatal death in the referral hospitals of Gaza Province. Where blood gas analysis is unavailable, a low five-minute Apgar score remains a key marker of intrapartum compromise. This study aimed to identify maternal, obstetric, fetal and institutional factors associated with a low five-minute Apgar score at Xai-Xai Provincial Hospital, Mozambique. We conducted a secondary analysis of the records of 471 newborns delivered between January 2016 and December 2018, drawn from a matched case-control study of early neonatal death. The outcome was a five-minute Apgar score below 7. Associations were estimated with bivariate and multivariable conditional logistic regression and are reported as odds ratios with 95% confidence intervals. Of the 471 newborns, 76 (16.1%) had a low five-minute Apgar score. In the multivariable model, a gestational age of 42 weeks or more (adjusted odds ratio 4.04; 95% confidence interval 1.18-13.82) and ruptured membranes on admission (adjusted odds ratio 3.69; 95% confidence interval 1.37-9.96) were associated with higher odds of a low score, whereas partograph use during labour was associated with lower odds (adjusted odds ratio 0.07; 95% confidence interval 0.01-0.31). The association with preterm birth was attenuated after adjustment for birth weight. Post-term birth and ruptured membranes on admission were associated with a low five-minute Apgar score, and partograph use with lower odds. Because the sample was drawn from a study of early neonatal death, these associations should be confirmed in unselected birth cohorts. They nonetheless support strengthening intrapartum monitoring in Mozambican referral maternities.

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'I love my AI girlfriend': a content analysis of youth social AI risk in online communities

Bischops, A. C.; Berkane, T.; Martoma, D.; Majumder, M.

2026-10-01 pediatrics 10.64898/2026.09.25.26363809 medRxiv
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Youth are increasingly engaging with generative AI beyond its use as a productivity tool, with a growing share turning to AI for social interaction and emotional support. This leads to unknown risks for their well-being and development. Online community discussions reveal that youth already perceive risks that caregivers have not recognized.

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Early Pregnancy Glycosylated Hemoglobin in Relation to Gestational Diabetes Mellitus and Adverse Pregnancy Outcomes: Evidence from a Multisite Low- and Middle-Income Countries Cohort

Yang, W.-C.; Sunil Joseph, S.; Vijayalekshmi, B.; Freeman, B. L.; Nisar, M. I.; Pan, Q.; Benjamin, S. J.; G, J. A.; Sharma, N.; Mazumder, S.; Hoodbhoy, Z.; Akelo, V.; Aweyo, F.; Smith, E. R.; Mores, C. N.; Oakley, E. M.; Spelke, M. B.; Mwape, H.; Mukuka, S.; Kasaro, M. P.; Cherian, A. G.

2026-09-29 public and global health 10.64898/2026.09.23.26362980 medRxiv
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Background Oral glucose tolerance test (OGTT), the gold standard for diagnosing gestational diabetes mellitus (GDM), faces significant implementation challenges, prompting interest in alternative biomarkers, such as glycated hemoglobin (HbA1c), for early detection. This study aimed to assess the association between early pregnancy HbA1c and subsequent GDM and adverse perinatal outcomes in low- and middle-income countries. Methods We analyzed data from the Pregnancy Risk, Infant Surveillance, and Measurement Alliance - Maternal and Newborn Health (PRISMA-MNH) cohort, which followed pregnant women enrolled before 20 weeks of gestation across five study sites in Kenya, India, Pakistan, and Zambia. We excluded participants with overt diabetes, severe anemia (Hb <7.0 g/dl), multiple gestations, or pregnancies that ended before 24 weeks of gestation. HbA1c was measured at enrollment. The primary outcome was GDM, diagnosed according to the International Association of Diabetes and Pregnancy Study Groups (IADPSG) criteria based on OGTT performed after 24 weeks of gestation. Secondary outcomes included hypertensive disorder of pregnancy, emergent Cesarean section, preterm birth, large for gestational age, and stillbirth after 28 weeks. We used AUC and ROC analyses to evaluate predictive performance and single- and two-threshold approaches to identify optimal cutoffs for predicting GDM. We used modified Poisson regression with robust standard errors to assess associations between early HbA1c and outcomes, and meta-analysis to pool site-specific estimates. Results Among 10,918 pregnancies, GDM prevalence was 6.4%. Women with GDM were older (28.0 +/- 5.4 versus 26.0 +/- 5.3 years) and had higher BMI at enrollment (25.0 +/- 5.8 versus 22.9 +/- 5.0 kg/m2) than women without GDM. The AUC for HbA1c alone in predicting GDM was 0.65 (95% confidence interval 0.63-0.67). A single early HbA1c threshold of 5.4%, based on the largest Youden's index, showed limited predictive performance (sensitivity 46.7%, specificity 75.8%). A two-threshold approach identified rule-out and rule-in cutoffs of 5.0% (sensitivity 80.3%, specificity 35.6%) and 5.5% (sensitivity 34.5%, specificity 83.1%), respectively. In adjusted models, each 0.1% increase in HbA1c was associated with a 12% higher risk (RR 1.12, 95% CI 1.10-1.15) of GDM, while no significant associations were observed for any secondary outcomes. Conclusion Early pregnancy HbA1c is independently associated with an increased risk of subsequent GDM. However, it demonstrated limited discriminatory ability as a standalone alternative to OGTT for identifying women who would later develop GDM. The identified rule-out threshold may help identify women at low risk of GDM, although the majority would still require OGTT for definitive diagnosis.