Table 2. Interaction model—weight change at 12 months (N = 1025).
| Estimate (SE) | df | Adj df | F | p | |
|---|---|---|---|---|---|
| Race (non-Black as referent) | −1.33 (0.68) | 1 | 946.70 | 3.80 | 0.0515 |
| Treatment (SD condition as referent) | |||||
| IT | −0.92 (0.34) | 2 | 11,558.00 | 9.75 | <.0001 |
| PC | −1.51 (0.34) | ||||
| Weight at randomization | 0.03 (0.01) | 1 | 834.00 | 14.51 | 0.0002 |
| SF-36 vitality | −0.05 (0.02) | 1 | 663.40 | 6.24 | 0.0127 |
| Family discouragement, eating habits | 0.25 (0.11) | 1 | 928.70 | 5.46 | 0.0197 |
| Friends discouragement, eating habits | −0.24 (0.11) | 1 | 428.10 | 4.61 | 0.0324 |
| Friend encouragement, exercise | −0.02 (0.13) | 1 | 701.8 | 0.03 | 0.8530 |
| Race*friend encouragement, exercise | 0.41 (0.20) | 1 | 935.10 | 4.23 | 0.0400 |
R2 = 0.0517, controlling for gender; SF-36: (a) Physical Composite, (b) Bodily Pain, (c) General Health, (d) Social Functioning, (e) Vitality; Family Encouragement of Eating Habits; Friend Encouragement of Eating Habits; Family Encouragement of Exercise; Perceived Stress; and, Depression
IT Interactive Technology, PC Personal Contact; only those variables with a significant difference in LS-means are included