Obstructive sleep apnea, diagnosed by the Berlin questionnaire and association with coronary artery disease severity

Background: obstructive sleep apnea syndrome (osas) is a highly prevalent sleep-relateddisorder that is associated with increased risk of hypertension (htn) and coronary heartdisease. this study aimed to evaluate the correlation between the osas and coronary arterydisease (cad) severity.methods: the cross-sectional study was conducted from september 2012 to december 2013.we enrolled 127 patients with chronic stable angina who were referred for coronaryangiographic studies in shahid chamran and nour hospitals in isfahan, iran. the berlinquestionnaire (bq) was used for estimate the probability of osas in patients as a low or highprobability. demographic characteristics and metabolic risk factors including diabetes mellitus,htn, obesity, and smoking also were recorded. the severity of cad was assessed and comparedbased on the gensini score with mann–whitney u statistical test. independent t-test forcontinuous variables and chi-square test for categorical variables were used.results: totally, 65.4% of subjects were considered as high and 34.6% as low probability forosas, which 81.1% of them had cad. there was a significant difference between body massindex, systolic blood pressure, diastolic blood pressure, and ischemic heart disease drugconsumption with osas probability (p < 0.0500). cad was accompanied by osas significantly(p = 0.0260). the gensini score was significantly higher in patients with high osas probability(100.4 ± 69.1 vs. 65.3 ± 68.9; p = 0.0030). osas also increase odds of cad based on regressionanalysis (odds ratio, 95% confidence interval = 2.7).conclusion: this study indicates that more severe cad is associated with high osasprobability identified by bq.