title: Impact of statins on risk of new onset diabetes mellitus: a population-based cohort study using the Korean National Health Insurance claims database.
abstract: Statin therapy is beneficial in reducing cardiovascular events and mortalities in patients with atherosclerotic cardiovascular diseases. Yet, there have been concerns of increased risk of diabetes with statin use. This study was aimed to evaluate the association between statins and new onset diabetes mellitus (NODM) in patients with ischemic heart disease (IHD) utilizing the Korean Health Insurance Review and Assessment Service claims database. Among adult patients with preexisting IHD, new statin users and matched nonstatin users were identified on a 1:1 ratio using proportionate stratified random sampling by sex and age. They were subsequently propensity score matched further with age and comorbidities to reduce the selection bias. Overall incidence rates, cumulative rates and hazard ratios (HRs) between statin use and occurrence of NODM were estimated. The subgroup analyses were performed according to sex, age groups, and the individual agents and intensities of statins. A total of 156,360 patients (94,370 in the statin users and 61,990 in the nonstatin users) were included in the analysis. The incidence rates of NODM were 7.8% and 4.8% in the statin users and nonstatin users, respectively. The risk of NODM was higher among statin users (crude HR 2.01, 95% confidence interval [CI] 1.93-2.10; adjusted HR 1.84, 95% CI 1.63-2.09). Pravastatin had the lowest risk (adjusted HR 1.54, 95% CI 1.32-1.81) while those who were exposed to more than one statin were at the highest risk of NODM (adjusted HR 2.17, 95% CI 1.93-2.37). It has been concluded that all statins are associated with the risk of NODM in patients with IHD, and it is believed that our study would contribute to a better understanding of statin and NODM association by analyzing statin use in the real-world setting. Periodic screening and monitoring for diabetes are warranted during prolonged statin therapy in patients with IHD.
authors: Division of Clinical Pharmacy, College of Pharmacy, Ajou University, Suwon, South Korea.
authors: Jimin
authors: J
authors: Lee
authors: Division of Clinical Pharmacy, College of Pharmacy, Ajou University, Suwon, South Korea.
authors: Yoojin
authors: Y
authors: Noh
authors: Division of Clinical Pharmacy, College of Pharmacy, Ajou University, Suwon, South Korea.
authors: Sooyoung
authors: S
authors: Shin
authors: Department of Cardiology, School of Medicine, Ajou University, Suwon, South Korea.
authors: Hong-Seok
authors: HS
authors: Lim
authors: Department of Biomedical Informatics, School of Medicine, Ajou University, Suwon, South Korea.
authors: Rae Woong
authors: RW
authors: Park
authors: Division of Pharmaceutical Sciences, College of Pharmacy, The Catholic University of Korea, Bucheon, South Korea.
authors: Soo Kyung
authors: SK
authors: Bae
authors: Division of Pharmaceutical Sciences, College of Pharmacy, The Catholic University of Korea, Bucheon, South Korea.
authors: Euichaul
authors: E
authors: Oh
authors: Division of Biomedical Informatics, College of Medicine, Seoul National University, Seoul, South Korea.
authors: Grace Juyun
authors: GJ
authors: Kim
authors: Division of Biomedical Informatics, College of Medicine, Seoul National University, Seoul, South Korea.
authors: Ju Han
authors: JH
authors: Kim
authors: Division of Clinical Pharmacy, College of Pharmacy, Ajou University, Suwon, South Korea.
authors: Sukhyang
authors: S
authors: Lee
keywords: Atorvastatin; Fluvastatin; IHD; Ischemic heart disease; Lovastatin; NODM; Pitavastatin; Pravastatin; Rosuvastatin; Simvastatin; new onset diabetes mellitus