Comorbidity clusters associated with newly treated Type 2 diabetes mellitus: a Bayesian nonparametric analysis

BackgroundType 2 Diabetes Mellitus (T2DM) is associated with the development of chronic comorbidities over time, which can lead to high drug utilization and adverse events. Understanding the patterns of disease progression is needed. ObjectivesTo identify common comorbidity clusters and explore the progression over time in newly treated T2DM patients. MethodsThe IQVIA Medical Research Data incorporating data from THIN, a Cegedim database of anonymized electronic health records, was used to identify all patients with a first-ever prescription for a non-insulin antidiabetic drug (NIAD) between January 2006 and December 2019. We selected 58 chronic comorbidities of interest and used Bayesian nonparametric latent models (BNLM) to identify disease clusters and model their progression over time. ResultsAmong the 175,383 eligible T2DM patients, we identified the 20 most frequent comorbidity clusters, which were comprised of 14 latent features (LFs). Each LF was associated with a main disease (e.g., 98% of patients in cluster 2, characterized by LF2, had congestive heart failure [CHF]). The presence of certain LFs increased the probability of having another LF active. For example, LF2 (CHF) frequently appeared with LFs related to chronic kidney disease (CKD). Over time, the clusters associated with cardiovascular diseases, such as CHF, progressed rapidly. Moreover, the onset of certain diseases led to the appearance of further complications (e.g., CHF onset was associated with an increasing prevalence of CKD). ConclusionsOur models identified established T2DM complications and previously unknown connections, thus, highlighting the potential for BNLMs t to characterize complex comorbidity patterns.