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

Table 3 Stepwise multinomial logistic regression model estimating predictors of exercise behavior at 12- month follow-up (n = 263)

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. VO_2peak (mL/kg∙min)	1.04 (0.95–1.15)	0.38	1.12 (1.05–1.20)	< 0.001	1.07 (1.00–1.14)	0.05
2. TPB Difficulty (1–5) ^a	0.91 (0.56–1.48)	0.72	0.80 (0.58–1.12)	0.19	0.60 (0.43–0.85)	0.004
3. Sleep quality (0–21) ^a	0.93 (0.83–1.06)	0.27	0.95 (0.88–1.03)	0.23	1.05 (0.98–1.14)	0.19
4. lower body endurance (reps)	0.99 (0.97–1.00)	0.12	1.00 (1.00–1.01)	0.42	1.01 (1.00–1.02)	0.11
	Aerobic vs. Resistance		Combined vs. Aerobic		Combined vs. Resistance
	OR (95% CI)	p	OR (95% CI)	p	OR (95% CI)	p
1. VO_2peak (mL/kg∙min)	1.08 (0.98–1.18)	0.11	0.95 (0.90–1.00)	0.06	1.02 (0.93–1.12)	0.64
2. TPB Difficulty (1–5) ^a	0.88 (0.55–1.41)	0.59	0.75 (0.55–1.03)	0.07	0.66 (0.40–1.07)	0.09
3. Sleep quality (0–21) ^a	1.02 (0.91–1.15)	0.73	1.11 (1.03–1.19)	0.005	1.13 (1.00–1.27)	0.049
4. lower body endurance (reps)	1.02 (1.00–1.04)	0.043	1.00 (1.00–1.01)	0.30	1.02 (1.00–1.04)	0.015

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 and worse sleep quality

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