Table 3.

Categorical covariates (n = 193) considered in the analysis.

Covariate	Count
Sex
Male	161
Female	32
Race
Asian	2
Black	33
Caucasian	154
Hispanic	3
Other	1
New York Heart Association score
Class 3	157
Class 4	36
Digoxin
With	106
Without	87
β-blocking agent
With	32
Without	161
Aetiology
Coronary artery disease	156
Non-ischaemic dilated cardiomyopathy	32
Other	5