Table 2.
Summary of interaction testing findings
| Interaction terms | Outcomes of interest | |||||
|---|---|---|---|---|---|---|
| Δ Weight (kg) | Δ BMI | Δ Weekly walking MET-minutes | Δ Weekly moderate-to-vigorous activity MET-minutes | Δ Weekly total MET-minutes | Δ REAP-S sum score | |
| Among all social network members (n ranged from 253 to 306) | ||||||
| Relationship closeness*treatment group |
✓ (p=0.030) |
✗ (p=0.050) |
✗ (p=0.975) |
✗ (p=0.429) |
✗ (p=0.551) |
✓ (p=0.007) |
| Spatial closeness*treatment group | ✗ (p=0.132) |
✗ (p=0.208) |
✗ (p=0.401) |
✗ (p=0.771) |
✗ (p=0.507) |
✗ (p=0.291) |
| Social network members who had a very close relationship with trial participants (n ranged from 143 to 173) | ||||||
| Spatial closeness*treatment group |
✓ (p=0.046) |
✗ (p=0.097) |
✓ (p=0.027) |
n/a | n/a | ✗ (p=0.151) |
| Social network members who were spatially close to trial participants (n ranged from 155 to 185) | ||||||
| Relationship closeness*treatment group | ✗ (p=0.473) |
✗ (p=0.292) |
✗ (p=0.132) |
n/a | n/a |
✓ (p=0.012) |
Significant p-values are indicated in bold. ✓ indicates statistically significant interaction terms. ✗ indicates statistically insignificant interaction terms. All models controlled for social network members’ age, sex, education, relationship status, employment status, self-rated health, trial participants’ program attendance, and baseline value of outcome of interest as fixed effects. Trial program sites and trial participants’ identification number were treated as random effects in all models.