Baseline characteristics by study drug class use.

Abbreviations: SD, standard deviation; n, number; ACE, angiotensin converting enzyme; ARB, angiotensin receptor blocker; CCB, calcium channel blocker; BB, beta blocker.
1The standardized difference is the difference between group means expressed as a proportion of that characteristic's pooled standard deviation. It is less sensitive to sample size than hypothesis testing. Standardized differences greater than 0.1 are considered significant.
2Comorbidities were identified using administrative codes in the five years preceding the qualifying anti-hypertensive prescription.date, chronic lung disease, stroke, dementia.
Baseline characteristics by study drug class use.