Fig. 2: Kaplan–Meier curves depicting the probability of dementia-free and cardiovascular disease-free survival between sleep profiles.
From: Multidimensional sleep profiles via machine learning and risk of dementia and cardiovascular disease
P-values are derived from Wald tests based on unadjusted Cox proportional hazards models, using the Active healthy sleepers profile as the reference group. a, b correspond to Kaplan–Meier plots for dementia incidence and cardiovascular disease events incidence, respectively. Green, blue, and yellow lines correspond to Active healthy sleepers, Fragmented poor sleepers, and Long and frequent nappers profiles, respectively. The sample size was n = 2562 for dementia outcome and n = 2606 for cardiovascular disease outcome. Abbreviations: CVD cardiovascular disease, No. number
