Prevalence of Angina Among Primary Care Patients With Coronary Artery Disease

Key Points Question What is the prevalence of angina among stable US outpatients with coronary artery disease (CAD)? Findings In a survey study of 1612 outpatient primary care patients with CAD in a large US integrated primary care network, 21.2% of surveyed patients reported experiencing angina at least once per month (daily or weekly, 12.5%; monthly, 8.7%). After multivariable adjustment, speaking a language other than Spanish or English, Black race, smoking, atrial fibrillation, and chronic obstructive pulmonary disease were associated with increased angina frequency. Meaning These findings suggest that angina is prevalent among US outpatients with CAD; proactive angina assessment in outpatient settings may identify patients with suboptimally controlled angina and may be associated with improved treatment and outcomes.
This survey study examines the prevalence and frequency of angina among stable US outpatients with coronary artery disease.
Importance Angina pectoris is associated with morbidity and mortality. Angina prevalence and frequency among contemporary US populations with coronary artery disease (CAD) remain incompletely defined. Objective To ascertain the angina prevalence and frequency among stable outpatients with CAD. Design, Setting, and Participants This cross-sectional survey study involved telephone-based administration of the Seattle Angina Questionnaire–7 (SAQ-7) between February 1, 2017, and July 31, 2017, to a nonconvenience sample of adults with established CAD who receive primary care through a large US integrated primary care network. Data analysis was performed from August 2017 to August 2019. Exposure SAQ-7 administration. Main Outcomes and Measures Angina prevalence and frequency were assessed using SAQ-7 question 2. Covariates associated with angina were assessed in univariable and multivariable regression. Results Of 4139 eligible patients, 1612 responded to the survey (response rate, 38.9%). The mean (SD) age of the respondents was 71.8 (11.0) years, 577 (35.8%) were women, 1447 (89.8%) spoke English, 147 (9.1%) spoke Spanish, 1336 (82.8%) were White, 76 (4.7%) were Black, 92 (5.7%) were Hispanic, 974 (60.4%) had Medicare, and 83 (5.2%) had Medicaid. Among respondents, 342 (21.2%) reported experiencing angina at least once monthly; among those, 201 (12.5%) reported daily or weekly angina, and 141 respondents (8.7%) reported monthly angina. The mean (SD) SAQ-7 score was 93.7 (13.7). After multivariable adjustment, speaking a language other than Spanish or English (odds ratio [OR], 5.07; 95% CI, 1.39-18.50), Black race (OR, 2.01; 95% CI, 1.08-3.75), current smoking (OR, 1.88; 95% CI, 1.27-2.78), former smoking (OR, 1.69; 95% CI, 1.13-2.51), atrial fibrillation (OR, 1.52; 95% CI, 1.02-2.26), and chronic obstructive pulmonary disease (OR, 1.61; 95% CI, 1.18-2.18) were associated with more frequent angina. Male sex (OR, 0.63; 95% CI, 0.47-0.86), peripheral artery disease (OR, 0.63; 95% CI, 0.44-0.90), and novel oral anticoagulant use (OR, 0.19; 95% CI, 0.08-0.48) were associated with less frequent angina. Conclusions and Relevance Among stable outpatients with CAD receiving primary care through an integrated primary care network, 21.2% of surveyed patients reported experiencing angina at least once monthly. Several objective demographic and clinical characteristics were associated with angina frequency. Proactive assessment of angina symptoms using validated assessment tools and estimation of patients at higher risk of suboptimally controlled angina may be associated with reduced morbidity.