Table IV.

Best fitting models for changes in exercise peak rate-pressure product, peak heart rate increase, and heart rate reserve after 3 years, including abstinence status

A. Change in exercise peak RPP (year 3 – baseline)
Adjusted R2 = 0.14	Standardized β	t	P
Resting HR (beats/min)	−0.29	−5.89	<.001
Abstinence at year 3	0.20	4.03*	<.001
Age (y)	0.12	2.36	.02
B. Change in exercise peak HR increase (year 3 – baseline)
Adjusted R2 = 0.11	Standardized β	t	P
Abstinence at year 3	0.30	4.55	<.001
Change in weight from baseline (kg)	−0.10	−1.25	.21
Age (y)	0.11	2.20	.03
Interaction of change in weight and abstinence at year 3	−0.18	2.13	.03
C. Change in exercise HR reserve (year 3 – baseline)
Adjusted R2 = 0.17	Standardized β	t	P
Resting HR (beats/min)	−0.34	6.91	<.001
Abstinence at year 3	0.23	4.64	<.001

Models initially included abstinence status at year 3, age, sex, resting HR, resting systolic BP, use of β-blockers, body mass index, change in weight, quartile of moderate-vigorous leisure time activity, presence of a home smoking ban, as well as any other variable that was correlated significantly at baseline.

Only significant predictors are displayed above, except for Table 4B because it includes an interaction term.

Data are from the 368 subjects with baseline and 3-year stress tests.

Abbreviations as in Table I.