The findings of this study were as follows: (1) 72.5% of AF patients had SDB;(2) 23.1% of AF patients had CSR; (3) AHI was associated with age, sex, BMI, andhypertension; and (4) the presence of CSR was associated with older age, DM, andelevated NT-proBNP levels, suggesting that in patients with AF, SDB is highlyprevalent, particularly among older, obese men with hypertension. Here, NPPB is linked to atrial fibrillation.