Table 3. Interaction model—weight change at 30 months (N = 1025).
| Estimate (SE) | df | Adj df | F | p | |
|---|---|---|---|---|---|
| Race (non-Black as referent) | −6.17 (5.81) | 1 | 307.70 | 1.13 | 0.2892 |
| Gender (men as referent) | −0.36 (1.48) | 1 | 138.10 | 0.06 | 0.8102 |
| Race*Gender | −4.50 (2.31) | 1 | 451.80 | 3.79 | 0.0521 |
| Treatment (SD condition as referent) | |||||
| IT | 0.07 (1.49) | 2 | 841.90 | 4.35 | 0.0132 |
| PC | −0.33 (1.46) | ||||
| Race*treatment (non-Black as referent) | |||||
| Race*IT | −2.87 (2.51) | 1 | 892.90 | 1.30 | 0.2541 |
| Race*PC | −3.35 (2.63) | ||||
| Sex*Treatment (men as referent) | |||||
| Sex*IT | 0.98 (2.05) | 1 | 162.80 | 0.23 | 0.6328 |
| Sex*PC | 0.09 (1.95) | ||||
| Race*sex*treatment (non-Black and men as referents) | |||||
| Race*Sex*IT | 3.60 (3.13) | 1 | 688.90 | 1.32 | 0.2505 |
| Race*Sex*PC | 5.75 (3.17) | ||||
| Weight at randomization | 0.03 (0.01) | 1 | 275.40 | 6.08 | 0.0143 |
| SF-36 mental composite | −0.15 (0.05) | 1 | 347.10 | 8.54 | 0.0037 |
| Race*SF-36 mental composite | 0.22 (0.08) | 1 | 307.70 | 7.75 | 0.0057 |
| SF-36 physical composite | −0.03 (0.08) | 1 | 273.30 | 0.65 | 0.4218 |
| Race*SF-36 physical composite | 0.14 (0.07) | 1 | 269.20 | 4.23 | 0.0408 |
| SF-36 Vitality Subscale | 0.07 (0.04) | 1 | 535.00 | 2.33 | 0.1273 |
| Race*SF-36 Vitality Subscale | −0.2 (0.07) | 1 | 522.80 | 6.89 | 0.0089 |
| Friend encouragement, eating habits | 0.65 (0.16) | 1 | 200.50 | 17.41 | <.0001 |
| Perceived stress | 0.24 (0.27) | 1 | 558.70 | 0.84 | 0.3595 |
| Race*perceived stress | −1.63 (0.43) | 1 | 800.80 | 13.98 | 0.0002 |
| Sex*perceived stress | −0.17 (0.32) | 1 | 192.20 | 0.27 | 0.6041 |
| Race*sex*perceived stress | 2.08 (0.52) | 1 | 757.30 | 16.16 | <.0001 |
| Perceived stress (SD condition as referent)*treatment | |||||
| Stress*IT | −0.22 (0.38) | 1 | 642.20 | 0.33 | 0.5664 |
| Stress*PC | −0.43 (0.37) | ||||
| Perceived stress*race*treatment (SD condition and non-Black as referents) | |||||
| Stress*Race*IT | 1.62 (0.61) | 1 | 910.90 | 6.99 | 0.0084 |
| Stress*Race*PC | 1.32 (0.65) | ||||
| Perceived stress*sex*treatment (SD condition and men as referents) | |||||
| Stress*race*IT | −0.01 (0.48) | 1 | 235.30 | 0.00 | 0.9955 |
| Stress*race*PC | 0.10 (0.46) | ||||
| Perceived stress*race*sex*treatment (SD condition, non-Black, and men as referents) | |||||
| Stress*race*sex*IT | −1.98 (0.75) | 1 | 735.00 | 6.90 | 0.0088 |
| Stress*race*sex*PC | −1.87 (0.76) | ||||
R2 = 0.0643, controlling for SF-36: (a) Bodily Pain, (b) General Health, (c) Social Functioning; Family Discouragement of Eating Habits; Family Encouragement of Eating Habits; Family Encouragement of Exercise; Friend Encouragement of Exercise; Perceived Stress; and, Depression
SD Self-Directed, IT Interactive Technology, PC Personal Contact; only those variables with a significant difference in LS-means are included