Variations in sex differences in major cardiometabolic risk factors by age and menopause status: results from the UK Biobank

Background Sex differences have not been fully explored for certain risk factors or by age or age-related factors, such as menopause. We addressed this issue in a large population cohort. Methods UK Biobank participants with >= 1 risk factor measured at baseline were included. We assessed sex differences, by age and menopausal status, in prevalence, treatment and control of cardiometabolic risk factors. Results 501 389 adults (54.4% women, mean age 56.6 (SD 8.1) years) were included. Mean risk factor levels that were lower in women than men include systolic blood pressure (women-to-men difference: -5.6 mm Hg), diastolic blood pressure (-3.4 mm Hg), body mass index (-0.75 kg/m(2)), waist circumference (-12.2 cm), triglycerides (0.34 mmol/L), glycated haemoglobin (-0.52 mmol/mol) and glucose (-0.08 mmol/L), while high-density lipoprotein cholesterol (+0.31 mmol/L) and C reactive protein (+0.08 mg/L) were higher among women. Total cholesterol and low-density lipoprotein cholesterol (LDL-C) were lower in women than men at younger ages (-0.23 and -0.30 mmol/L, respectively, at <50 years), and higher at older ages (+0.74 and +0.41 mmol/L, at >= 60 years). Total cholesterol and LDL-C were lower in premenopausal women (-0.29 and -0.34 mmol/L, respectively) and higher in postmenopausal women (+0.61 and +0.31 mmol/L), compared with similarly aged men. Prevalence was lower among women than men for current smoking (-3.6%), hypertension (-13.9%), obesity (-1.9%) and diabetes (-2.0%), and sex differences were smaller at older ages and in postmenopausal women. Dyslipidaemia prevalence was lower in women aged <50 years (-8.8%) and premenopausal women (-11.0%), and higher in women aged >= 60 years (+5.4%) and postmenopausal women (+4.6%). Treatment and control of dyslipidaemia were lower in women than men (-12.5% and -12.6%, respectively). Conclusions Effective public health policy is required to address suboptimal risk factor prevalence, treatment and control in both sexes. Targeted interventions may be warranted to address dyslipidaemia among women at older ages.