Table 4: Coefficients derived from final multivariate model predicting weight change, accounting for effect modification by Interval.

Difference in weight change (β) ± SE (P-value)P-value for interaction term
Interval 1Interval 2

Intercept−2.7 ± 1.8 (.14)4.1 ± 0.9 (<.001)0.001
CD4 <200 cells/μL (yes/no)3.5 ±1.5 (.03)−3.0 ± 0.7 (<.001)<0.001
Adherence to HIV meds (Excellent/Very Good versus Good/Fair/Poor)3.0 ± 0.9 (.002)−0.01 ± 0.7 (.98)0.01
Nausea (yes/no)2.2 ± 0.8 (.006)−1.3 ± 0.8 (.13)0.005
Moderate/Heavy Drinker (yes/no)−2.6 ± 1.0 (.02)−0.02 ± 0.8 (.98)0.06
Liquid supplements (yes/no)2.6 ± 1.0 (.01)−1.3 ± 1.5 (.39)0.05
Tobacco smoking−1.2 ± 0.5 (.02)0.17

Interaction term (Tobacco smoking * Interval) was dropped from the final model due to nonsignificant P-value. Coefficient shown is from main effect of tobacco smoking only.