Objectively-assessed physical activity and weight change in young adults: a randomized controlled trial

Table 3 Physical activity levels based upon gaining or not gaining ≥1 lb

		Baseline to Month 4 change			Baseline to Year 1 change			Baseline to Year 2 change			Mixed effects model*
		N	Mean ± std. dev Median (IQR)	p-value⁺	N	Mean ± std. dev Median (IQR)	p-value⁺	N	Mean ± std. dev Median (IQR)	p-value⁺	Beta coefficient (std err)	p-value
Change in daily steps
Gained >1 lb. from baseline to Year 2	Yes	182	−49 ± 2964 −104 (−1436, 1588)	0.1253	158	−346 ± 2598 −40 (−1794, 1137)	0.3328	173	−568 ± 2947 −388 (−2480, 1224)	0.1015	−302 (201)	0.1346
Gained >1 lb. from baseline to Year 2	No	275	304 ± 2525 375 (−1017, 1654)		263	111 ± 2798 −37 (−1583, 1714)		271	27 ± 3073 −45 (−1837, 1875)		−302 (201)	0.1346
Change in bout-related MVPA (min/week)
gained >1 lb. from baseline to Year 2	Yes	182	14.2 ± 239.7 0.0 (−90.3, 112.0)	0.0189*	158	−37.9 ± 276.9 −20.2 (−122.8, 80.5)	0.0051**	173	−34.4 ± 313.3 −40.0 (−144.7,89.0)	0.0023**	−47.8 (19.1)	0.0125*
gained >1 lb. from baseline to Year 2	No	275	49.8 ± 234.0 51.0 (−59.0, 186.4)		263	39.5 ± 279.2 25.9 (−90.0, 139.0)		271	59.2 ± 334.4 22.8 (−94.0,163.3)

⁺ p-value obtained using the Wilcoxon Rank Sum Test. Mixed effects model examines the change in physical activity across all time points. Other variables included in this model are: clinic, gender, race, total daily caloric intake, percentage of calories consumed from dietary fat, armband wear time, baseline value of outcome measure, treatment group, and treatment group x time interaction. Boldface indicates statistical significance (*p < 0.05, **p < 0.01)

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