Hazard ratios and 95% confidence intervals for the incidence of total strokes (N = 5,974), non-fatal strokes (N = 5,885), and fatal strokes (N = 5,745) according to self-reported sleep duration (hours per 24 hours), women aged 25 to 74 years.

Abbreviation: HR: hazard ratio, CI: confidence interval, N: Size of the underlying study population with regard to the particular stroke outcome, h: hour. Model 1: crude model (unadjusted). Model 2: adjusted for age (continuous) and survey (1, 2, 3, 4). Model 3: “Socio-demographic and lifestyle model” was, in addition to model 2, further adjusted for education (low, high), physical activity (>2 h/week, 1 h/week (regular), 1 h/week (irregular), no sport), alcohol consumption (men: 0–39 g/day, ≥40 g/day; women: 0–19 g/day, ≥20 g/day), current smoking activity (yes, no). Model 4: The full model (“health status model”) was, in addition to model 3, adjusted for BMI (continuous), hypertension (yes, no), diabetes (yes, no), dyslipidemia (yes, no). 1 Number of incident stroke cases. Hazard ratios and 95% confidence intervals for the incidence of total strokes (N = 5,974), non-fatal strokes (N = 5,885), and fatal strokes (N = 5,745) according to self-reported sleep duration (hours per 24 hours), women aged 25 to 74 years.