Fig. 1From: The prevalence of multimorbidity and its association with physical activity and sleep duration in middle aged and elderly adults: a longitudinal analysis from ChinaRelationships between poor sleep and multimorbidity stratified by physical activity level and gender. Note: The analyses were adjusted for age, gender, educational level, marital status, living place, household income, health insurance, Body Mass Index (BMI), smoking cigarettes, drinking alcohol and depressionBack to article page