Objectives To describe the sex differences in the prevalence of non-communicable diseases (NCDs) in adults aged 45 years or older in China.
Design Cross-sectional study.
Setting Nationally representative sample of the Chinese population 2011.
Participants 8401 men and 8928 women over 45 years of age who participated in the first wave of the China Health and Retirement Longitudinal Study (CHARLS).
Outcome measures Self-reported data on overall health and diagnosis of hypertension, dyslipidaemia, diabetes, heart disease, stroke, chronic lung disease, cancer or arthritis. Sex differences in NCDs were described using logistic regression to generate odds ratios (OR) with adjustment for sociodemographic factors and health-related behaviours. All analyses were stratified by age group for 45–64-year-old and ≥65-year-old participants.
Results In both age groups, men reported better overall health than women. The crude prevalence of heart disease, cancer and arthritis was higher while that of stroke and chronic lung disease was lower in women than in men. After adjustment, ORs (95% CI) for the 45–64 and ≥65 year age groups were 0.70 (0.58 to 0.84) and 0.66 (0.54 to 0.80), respectively, for arthritis for men compared with women. In contrast, ORs were 1.66 (1.09 to 2.52) and 2.12 (1.36 to 3.30) for stroke and 1.51 (1.21 to 1.89) and 1.43 (1.09 to 1.88) for chronic lung disease for men compared with women. ORs for heart disease (0.65 (0.52 to 0.80)) were lower in men than in women only in the 45–64 year age group.
Conclusions Odds of arthritis were lower while those of stroke and chronic lung disease were higher in men than in women in both age groups. However, odds of heart disease were lower in men than in women, but only in the group of individuals aged 45–64 years.
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Contributors YL conceptualised and designed the study, analysed and interpreted data, drafted the manuscript, critically revised the manuscript for important intellectual content and approved the final manuscript as submitted. GL conceptualised and designed the study, acquired and analysed data, drafted the manuscript and approved the final manuscript as submitted. HW conceptualised and designed the study, drafted the manuscript and approved the final manuscript as submitted. WJ and SW conceptualised and designed the study, critically revised the manuscript for important intellectual content and approved the final manuscript as submitted. DG conceptualised and designed the study, interpreted data, drafted the manuscript, critically revised the manuscript for important intellectual content and approved the final manuscript as submitted. All authors read and approved the final manuscript.
Competing interests None declared.
Patient consent Obtained.
Ethics approval The original CHARLS was approved by the ethics review committee of Peking University, and all participants gave written informed consent at the time of participation.
Provenance and peer review Not commissioned; externally peer reviewed.
Data sharing statement No additional data are available.
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