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. 2023 Mar 29;16(4):507.
doi: 10.3390/ph16040507.

Effects of Statin Dose, Class, and Use Intensity on All-Cause Mortality in Patients with Type 2 Diabetes Mellitus

Affiliations

Effects of Statin Dose, Class, and Use Intensity on All-Cause Mortality in Patients with Type 2 Diabetes Mellitus

Jung-Min Yu et al. Pharmaceuticals (Basel). .

Abstract

Purpose: to examine the impact of statins on reducing all-cause mortality among individuals diagnosed with type 2 diabetes. This investigation explored the potential correlations between dosage, drug classification, and usage intensity with the observed outcomes.

Methods: The research sample consisted of individuals aged 40 years or older diagnosed with type 2 diabetes. Statin usage was determined as a frequent usage over a minimum of one month subsequent to type 2 diabetes diagnosis, where the average statin dose was ≥28 cumulative defined daily doses per year (cDDD-year). The analysis employed an inverse probability of treatment-weighted Cox hazard model, utilizing statin usage status as a time-varying variable, to evaluate the impact of statin use on all-cause mortality.

Results: The incidence of mortality was comparatively lower among the cohort of statin users (n = 50,804 (12.03%)), in contrast to nonusers (n = 118,765 (27.79%)). After adjustments, the hazard ratio (aHR; 95% confidence interval (CI)) for all-cause mortality was estimated to be 0.32 (0.31-0.33). Compared with nonusers, pitavastatin, rosuvastatin, pravastatin, simvastatin, atorvastatin, fluvastatin, and lovastatin users demonstrated significant reductions in all-cause mortality (aHRs (95% CIs) = 0.06 (0.04-0.09), 0.28 (0.27-0.29), 0.29 (0.28-0.31), 0.31 (0.30-0.32), 0.31 (0.30-0.32), 0.36 (0.35-0.38), and 0.48 (0.47-0.50), respectively). In Q1, Q2, Q3, and Q4 of cDDD-year, our multivariate analysis demonstrated significant reductions in all-cause mortality (aHRs (95% CIs) = 0.51 (0.5-0.52), 0.36 (0.35-0.37), 0.24 (0.23-0.25), and 0.13 (0.13-0.14), respectively; p for trend <0.0001). Because it had the lowest aHR (0.32), 0.86 DDD of statin was considered optimal.

Conclusions: In patients diagnosed with type 2 diabetes, consistent utilization of statins (≥28 cumulative defined daily doses per year) was shown to have a beneficial effect on all-cause mortality. Moreover, the risk of all-cause mortality decreased as the cumulative defined daily dose per year of statin increased.

Keywords: class of statin; dose-dependent; mortality; statin; type 2 diabetes.

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Conflict of interest statement

The authors have no potential conflict of interest to declare. The data sets supporting the study conclusions are included in the manuscript.

Figures

Figure 1
Figure 1
Kaplan–Meier overall survival curves of patients with type 2 diabetes who used different classes of statins.
Figure 2
Figure 2
Kaplan–Meier overall survival curves of patients with type 2 diabetes who used different cDDD-year of statins.
Figure 3
Figure 3
DDD of statin use vs. HRs for all-cause mortality.
Figure 4
Figure 4
Kaplan–Meier overall survival curves of patients with type 2 diabetes who used and did not use statins.

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Grants and funding

Lo-Hsu Medical Foundation, LotungPoh-Ai Hospital, supports Szu-Yuan Wu’s work (Funding Number: 10908, 10909, 11001, 11002, 11003, 11006, and 11013).
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