Patterns and predictors of exercise behavior during 24 months of follow-up after a supervised exercise program during breast cancer chemotherapy

Table 4 Stepwise multinomial logistic regression model estimating predictors of exercise behavior at 24-month follow-up (n = 248)

Step/predictors	Resistance vs. Neither		Aerobic vs. Neither		Combined vs. Neither
Step/predictors	OR (95% CI)	p	OR (95% CI)	p	OR (95% CI)	p
1. Upper body strength (kg)	1.07 (1.01–1.13)	0.025	1.04 (0.99–1.08)	0.10	1.08 (1.04–1.13)	< 0.001
2. TPB Difficulty (1–5) ^a	0.86 (0.53–1.40)	0.54	0.58 (0.41–0.82)	0.002	0.62 (0.43–0.89)	0.010
3. VO_2peak (mL/kg∙min)	1.01 (0.93–1.11)	0.77	1.09 (1.03–1.16)	0.004	1.07 (1.01–1.14)	0.031
	Aerobic vs. Resistance		Combined vs. Aerobic		Combined vs. Resistance
	OR (95% CI)	p	OR (95% CI)	p	OR (95% CI)	p
1. Upper body strength (kg)	0.97 (0.92–1.03)	0.28	1.05 (1.01–1.09)	0.023	1.02 (0.96–1.07)	0.58
2. TPB Difficulty [1–5] ^a	0.67 (0.41–1.10)	0.11	1.08 (0.76–1.54)	0.67	0.72 (0.44–1.19)	0.20
3. VO_2peak (mL/kg∙min)	1.08 (0.99–1.17)	0.10	0.98 (0.93–1.04)	0.52	1.06 (0.97–1.15)	0.22

Resistance = meeting resistance exercise guideline only; Aerobic = meeting aerobic exercise guideline only; Neither = meeting neither exercise guideline; Combined = meeting both exercise guidelines; TPB = theory of planned behavior, OR represents the change in the odds of a meeting a guideline for a one-unit change in the variables
^a High scores indicate higher difficulty in exercise

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