Fig. 2

Associations between self-reported sleep characteristics and dementia by age groups, sex, and APOE ε4 status. A Sleep duration and dementia by age groups; B Sleep efficiency and dementia by age groups; C Sleep quality and dementia by sex; D Sleep duration and dementia by APOE ε4 status; E Sleep latency and dementia by APOE ε4 status. Model 1 was adjusted for age, sex, and education. Model 2 was additionally adjusted for body mass index, alcohol consumption status, smoking status, leisure-time physical activity, hypertension, diabetes, dyslipidemia, coronary heart disease, stroke, depressive symptoms, hypnotics use, and APOE genotype. ^*p < 0.05, ^**p < 0.01, ^***p < 0.001. Abbreviations: APOE apolipoprotein E gene, CI confidence interval, Ref. reference