Table 4.

Cox Proportional Hazard Models Testing the Association Between CR Dose and Having a Major Adverse Cardiovascular Event

	Unadjusted			Model 1			Model 2			Model 3
	HR	95% CI	P value	HR	95% CI	P value	HR	95% CI	P value	HR	95% CI	P value
≤1 Session	Referent		0.008†	Referent		0.006†	Referent		0.010†	Referent		0.001†
2 to 7 Sessions	0.88	(0.69–1.05)	0.139	0.85	(0.69–1.05)	0.150	0.84	(0.68–1.05)	0.125	0.81	(0.65–1.01)	0.060
7 to 20 Sessions	0.76	(0.61–0.91)	0.005	0.75	(0.60–0.91)	0.005	0.74	(0.62–0.94)	0.010	0.70	(0.57–0.87)	0.001
>20 Sessions	0.68	(0.53–0.87)	0.002	0.67	(0.52–0.86)	0.002	0.66	(0.55–0.91)	0.007	0.64	(0.50–0.82)	0.001
Per 1 session increase*	0.98	(0.97–0.99)	0.008	0.98	(0.97–0.99)	0.007	0.98	(0.97–0.99)	0.031	0.98	(0.97–0.99)	0.005

Cox proportional hazard models shown. Model 1 adjusted for age and sex; Model 2 adjusted for age, sex, ethnocultural background, history of hypertension, any former tobacco use, diabetes, dyslipidemia, and CR indication; Model 3 adjusted for sex, ethnocultural background, any former tobacco use, hypertension, dyslipidemia, the Charlson comorbidity index, and number of treated vessels during PCI.

CR indicates cardiac rehabilitation; HR, hazard ratio; and PCI, percutaneous coronary intervention.

^*Adjusted models that include this variable do not included session quartile.

^† Represents P value for trend.