Table 2.

Predictors of Mortality and Myocardial Infarction Among Patients Undergoing Cardiac Rehabilitation

Variable	HR (95% CI)
	Mortality	Myocardial Infarction
No. of cardiac rehabilitation sessions*
36 sessions vs 24 sessions	0.86 (0.77–0.97)	0.88 (0.83–0.93)
36 sessions vs 12 sessions	0.78 (0.71–0.86)	0.77 (0.69–0.86)
36 sessions vs 1 session	0.53 (0.47–0.59)	0.68 (0.58–0.81)
Subsequent hospitalization	2.68 (2.50–2.87)	1.55 (1.37–1.74)
Demographic characteristics
Age (per 5 years)	1.35 (1.31–1.39)	1.18 (1.13–1.24)
Male sex	1.31 (1.21–1.40)	0.98 (0.88–1.10)
Nonwhite race	1.04 (0.89–1.22)	1.29 (1.03–1.62)
Comorbid conditions
Cancer	1.43 (1.31–1.55)	0.93 (0.79–1.08)
Cerebrovascular disease	0.99 (0.92–1.06)	0.99 (0.88–1.11)
Chronic obstructive pulmonary disease	1.37 (1.27–1.46)	1.02 (0.91–1.14)
Dementia	1.84 (1.51–2.24)	1.41 (0.96–2.07)
Diabetes mellitus	1.21 (1.13–1.30)	1.41 (1.26–1.57)
Heart failure	1.84 (1.71–1.98)	1.29 (1.15–1.45)
Hypertension	0.87 (0.78–0.96)	1.05 (0.89–1.25)
Peripheral vascular disease	1.22 (1.14–1.31)	1.12 (1.00–1.26)
Peptic ulcer disease	1.17 (1.01–1.35)	0.99 (0.76–1.28)
Renal disease	1.35 (1.22–1.49)	1.32 (1.11–1.58)

Abbreviations: CI, confidence interval; HR, hazard ratio.

^*Estimates from the mortality model are based on a nonlinear spline function; estimates from the myocardial infarction model are based on a linear function.