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

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

   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
No 275 304 ± 2525
375
(−1017, 1654)
  263 111 ± 2798
−37
(−1583, 1714)
  271 27 ± 3073
−45
(−1837, 1875)
 
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*
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)
   
  1. + 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)