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. 2022 May 16;135(10):1242–1248. doi: 10.1097/CM9.0000000000001835

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Spline curves for associations of sleep duration with type 2 diabetes. (A) Nonadjusted. The reference group was 7 h/night sleep duration. P values were 0.184 for the overall association and 0.204 for the nonlinear association. (B) Adjusted for age (continuous), sex, BMI (continuous), smoking status (current, former, never), drinking status (current, former, never), hypertension (yes, no), and hyperlipidemia (yes, no). The reference group was 7 h/night sleep duration. Solid line represents odds ratio, and dotted lines represent 95% confidence interval of odds ratio. P values were 0.062 for the overall association and 0.092 for the nonlinear association. BMI: Body mass index; T2DM: Type 2 diabetes mellitus.