Among different subclasses of renin-angiotensin-aldosterone system inhibitors, the adjusted odds ratio (OR) for UTC risk was 1.00 [95% confidence interval (CI) = 0.96-1.04] in angiotensin-converting enzyme inhibitors, 1.22 (95% CI = 1.18-1.26) in patients who received angiotensin II receptor blockers, 0.91 (95% CI = 0.87-0.96) in spironolactone.