. Author manuscript; available in PMC: 2016 May 10.

Published in final edited form as: J Phys Act Health. 2010 Jul;7(4):517–526. doi: 10.1123/jpah.7.4.517

Table 4.

Median (25, 75 Percentile Range) and Beta (β) Values for Physical Activity at 1-Month Follow-Up

	Choice (n = 51)^a		Expert (n = 78)^a		Comparison (n = 81)^a		β values^b

	Baseline	One month	Baseline	One month	Baseline	One month	CH vs. EX	CH vs. CO	EX vs. CO
Moderate physical activity	150 (60, 300)	150 (90, 270)	150 (45, 300)	150 (90, 360)	180 (90, 420)	225 (120, 420)	−16.23	−33.65	−17.43
Moderate physical activity	150 (60, 300)	150 (90, 270)	150 (45, 300)	150 (90, 360)	180 (90, 420)	225 (120, 420)	−13.72	−32.20	−18.48
Vigorous physical activity	30 (0, 120)	60 (0, 135)	0 (0, 60)	70 (0, 150)	60 (0, 225)	90 (0, 225)	−32.35	16.46	48.82^**
Vigorous physical activity	30 (0, 120)	60 (0, 135)	0 (0, 60)	70 (0, 150)	60 (0, 225)	90 (0, 225)	−31.84^c	22.81	54.65^**

Abbreviations: CH, choice group; EX, expert group; CO, comparison group.

Note. All means are unadjusted. Physical activity measured as minutes per week.

P ≤ .05;

^**

P ≤ .01.

Numbers vary slightly due to missing data across outcomes.

Regression coefficients from linear regression models using transformed data; for each outcome variable, the top row presents unadjusted values; the bottom row presents values adjusted for age, education, and race.

In intention to treat analyses, the β value for this contrast was −39.30 (95% CI: −76.86, −1.75, P = .04).