Figure 3.

Risk of HF or death in black and while patients in prespecified subgroups (stratified by the etiology of cardiomyopathy, gender, QRS duration, and QRS morphology).

Findings were obtained from multivariate models further adjusted for age ≥ 65, etiology of cardiomyopathy, left ventricular ejection fraction, creatinine ≥1.4 mg/dL, diabetes mellitus, left atrial volume index (mL/BSA); analyses were carried out separately in blacks and whites and the effect in subgroups was assessed using interaction term analysis.