Inequity in primary and secondary preventive care for acute myocardial infarction? Use by socioeconomic status across middle-aged and older patients

Background — There has been limited research exploring socioeconomic inequity in targeted preventive care for acute myocardial infarction (AMI). The objective of this study was to examine socioeconomic disparities in the use of primary and secondary preventive services relevant to the identification and management of heart disease in a cohort of patients with AMI.

Methods — Preventive services used before the AMI event were examined in a cohort of 30,491 patients with first-time AMI in Ontario, Canada from 2010 to 2012. Using logistic regression, socioeconomic differences in lipid testing, glucose testing, stress testing, electrocardiography (ECG), and echocardiography in middle-aged and older patients were examined.

Results — For many of the services, there were no differences in the use of primary and secondary preventive services between patients according to socioeconomic status; however, a number of exceptions were found. Controlling for other factors, the researchers found that for primary preventive services, low-income middle-aged patients had 13% (95% confidence interval [CI], 0.790-0.967) and 10% (95% CI, 0.812-0.997) lower odds of receiving lipid and glucose testing, respectively, when compared with high-income middle-aged patients. Controlling for other factors, the researchers found that for secondary preventive services, low-income middle-aged and older patients had 24% (95% CI, 1.087-1.415) and 10% (95% CI, 1.012-1.202) higher odds of receiving echocardiography when compared with their high-income counterparts.

Conclusions — Socioeconomic disparities in primary and secondary preventive services for patients with AMI could not be demonstrated in many instances. However, inequities in primary preventive care were found in middle-aged patients receiving lipid and glucose testing, which may have implications for Canadian health policy to ensure healthy aging across the age spectrum.