Sex Differences in Cardiovascular Medication Prescription in Primary Care: A Systematic Review and Meta-Analysis

Background Sex differences in the management of cardiovascular disease have been reported in secondary care. We conducted a systematic review with meta-analysis of systematically investigated sex differences in cardiovascular medication prescription among patients at high risk or with established cardiovascular disease in primary care. Methods and Results PubMed and Embase were searched between 2000 and 2019 for observational studies reporting on the sex-specific prevalence of aspirin, statins, and antihypertensive medication prescription, including beta blockers, calcium channel blockers, angiotensin-converting enzyme inhibitors, and diuretics, in primary care. Random effects meta-analysis was used to obtain pooled women-to-men prevalence ratios for each cardiovascular medication prescription. Metaregression models assessed the impact of age and year on the findings. A total of 43 studies were included, involving 2 264 600 participants (28% women) worldwide. Participants' mean age ranged from 51 to 76 years. The pooled prevalence of cardiovascular medication prescription for women was 41% for aspirin, 60% for statins, and 68% for any antihypertensive medications. Corresponding rates for men were 56%, 63%, and 69% respectively. The pooled women-to-men prevalence ratios were 0.81 (95% CI, 0.72-0.92) for aspirin, 0.90 (95% CI, 0.85-0.95) for statins, and 1.01 (95% CI, 0.95-1.08) for any antihypertensive medications. Women were less likely to be prescribed angiotensin-converting enzyme inhibitors (0.85; 95% CI, 0.81-0.89) but more likely with diuretics (1.27; 95% CI, 1.17-1.37). Mean age, mean age difference between the sexes, and year of study had no significant impact on findings. Conclusions Sex differences in the prescription of cardiovascular medication exist among patients at high risk or with established cardiovascular disease in primary care, with a lower prevalence of aspirin, statins, and angiotensin-converting enzyme inhibitors prescription in women and a lower prevalence of diuretics prescription in men.