Abstract
BACKGROUND: Chest pain (CP) in patients with nonobstructive coronary artery disease is a therapeutic challenge affecting morbidity and mortality. We aimed to identify clinical factors associated with CP in this population, hypothesizing that obesity and depressive symptoms are associated with CP. METHODS AND RESULTS: In 814 patients with angiographically confirmed nonobstructive coronary artery disease, we measured sociodemographic variables, clinical risk factors, medications, and Patient Health Questionnaire 9 scores for depressive symptoms. We assessed CP frequency and prevalence by using all items from the Seattle Angina Questionnaire angina frequency domain to generate an angina frequency composite score. In the overall sample (58.8±11.7 years old, 52.6% female), 42.8% had obesity, and 71.5% had CP, with an angina frequency composite score (SD) score of 76.4 (22.1). Compared with individuals without obesity, individuals with obesity had a higher prevalence (77.6% versus 67%, P<0.001) and more frequent CP (angina frequency composite score, 74.9 [SD, 22.2] versus 78.3 [SD, 21.9], P=0.02). Obesity was independently associated with CP occurrence (odds ratio [OR], 1.7 [95% CI, 1-2.9], P=0.04). Obesity's connection with CP was only in men: men with obesity had more frequent CP (angina frequency composite score, 75.8 [SD, 20.1] versus 82.1 [SD, 19.9], P=0.002) and more prevalent CP (79.5% versus 58.2%, P<0.001) than their counterparts insofar as men with obesity had similar CP to women. Patient Health Questionnaire 9 score (OR, 1.07 [95% CI, 1.01-1.13], P=0.03) was independently associated with CP and partly mediated the association between obesity and CP. CONCLUSIONS: Obesity and depressive symptoms were independently associated with CP in individuals with nonobstructive coronary artery disease, particularly in men, and depressive symptoms partly mediated this association.