The effect of progesterone and pregnenolone on diabetes status in Chinese rural population: A dose-response analysis from Henan Rural Cohort

Abstract

Objective: Previous studies have uncovered a progestin-only contraceptive association with an increased risk of diabetes, but limited studies have explored the relationship of endogenous progesterone and pregnenolone levels with diabetes status. A case-control study was conducted in Henan Rural Cohort (register number: ChiCTR-OOC-15006699) to evaluate the dose-response independent and int eractive relationship of progesterone and pregnenolone levels with prediabetes and type 2 diabetes mellit us (T2DM) in Chinese rural population. Design: A case-control study. Methods: A total of 798 T2DM patients, 779 prediabetes patients, and 78 2 individuals with normal fasting plasma glucose were included in this study. Serum progesterone and pre gnenolone were detected by liquid chromatography-tandem mass spectrometry. Logistic regression and restricted cu bic splines were used to assess the independent effects of progesterone and pregnenolone on prediabetes and T2DM . Interactive plots were employed to examine the interaction effects of progesterone and pregnenolone. Results: Progesterone in the fourth versus first quartile was positively associated with prediabetes (odds ratio (OR) (95% CI): 2.66 (1.99-3.55)) and T2DM (OR (95% CI): 6.41 (4.57-8 .98)), whereas pregnenolone in the fourth versus first quartile was inversely related to prediabetes (OR (95% CI): 0.2 3 (0.16-0.33)) and T2DM (OR (95% CI): 0.44 (0.31-0.62)). Additionally, the nonlinear dose-response associations between progesterone and pregnenolone with prediabetes and T2DM were found. Interactive effects of progesterone and pre gnenolone on prediabetes and T2DM were observed, and these significant associations remained in gender- stratified analysis. Conclusions: Prediabetes and T2DM were positively linked to serum concentra tion of progesterone and negatively related to pregnenolone in a dose-response manner in Chinese ru ral population.