TABLE 4.
Mixed-effects, random-coefficient model of weight change as a function of activity energy expenditure (AEE)1
Coefficient | 95% CI | P | |
Model 1: log likelihood ratio = −2601.402 | |||
Baseline weight (kg) | 0.990 | 0.976, 1.004 | <0.001 |
Age (y) | −0.006 | −0.027, 0.016 | 0.73 |
Time (y) | 0.545 | 0.266, 0.824 | <0.001 |
AEE (MJ/d) | −0.072 | −0.287, 0.143 | 0.51 |
Site | 0.073 | −0.523, 0.668 | 0.81 |
Model 2: log likelihood ratio = −2599.003 | |||
Baseline weight (kg) | 0.990 | 0.976, 1.004 | <0.001 |
Age (y) | −0.005 | −0.027, 0.017 | 0.65 |
Time (y) | −0.244 | −1.143, 0.655 | 0.59 |
AEE (MJ/d) | −0.136 | −0.361, 0.090 | 0.24 |
Site | 0.041 | −0.578, 0.661 | 0.90 |
Time × AEE | 0.228 | −0.017, 0.472 | 0.07 |
Time × site | 0.107 | −0.464, 0.678 | 0.71 |
n = 148 Nigerian and 172 US women with a total of 987 weight determinations. Likelihood ratio test statistic for a comparison of model 1 and model 2: 4.73 (P = 0.09).
Estimated regression coefficients of model using random time coefficients and random intercepts and including AEE, age, and site as fixed effects.
Estimated regression coefficients of model using random time coefficients and random intercepts and including AEE, age, and site as fixed effects and including interaction terms for time-by-AEE and time-by-site.