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. 2013 Jul 4;15(7):e129. doi: 10.2196/jmir.2540

Table 3.

Weight change after 8 weeks for BLC and SC participants using GLMM and LOCF (all analyses controlled for baseline age and gender).


Mean (95% CI) Effect size,
Cohen’s d
P value for difference between groups

Total (n=1334) BLC (n=953) SC (n=381) Difference between groups

Primary analysis, GLMM





Absolute (kg) -4.6 (-4.9, -4.4) -4.5 (-4.8, -4.2) -5.1 (-5.5, -4.6) -0.6 (-1.2, -0.6) 0.06 .03

Percentage (%) -5.3 (-5.4, -5.1) -5.0 (-5.2. -4.7) -6.0 (-6.4, -5.7) -1.1 (-1.5, -0.7) 0.14 <.001
Sensitivity analysis, LOCF





Absolute (kg) -2.7 (-2.9, -2.6) -2.6 (-2.9, -2.4) -3.0 (-3.3, -2.6) -0.3 (-0.5, -0.2) 0.09 .005

Percentage (%) -3.0 (-3.2, -2.8) -2.9 (-3.1, -2.6) -3.4 (-3.7, -3.0) -0.5 (-0.7, -0.4) 0.15 <.001
Percentage weight change category





Weight gain, % (n) 3.9 (52) 4.7 (45) 1.8 (7) N/A N/A .02

0% to <5%, % (n) 72.1 (962) 72.6 (692) 70.9 (270)



5% to <10%, % (n) 20.8 (278) 20.0 (191) 22.8 (87)



10% or more % (n) 3.2 (42) 2.6 (25) 4.5 (17)