Table 4.
Adjusted least square means for between-group comparisons: physical activity changes
| Within-group change (intervention) | Within-group change (control) | Between-group difference (intervention - control) | ||
|---|---|---|---|---|
| Mean Change (95% CI) | Mean Change (95% CI) | Mean Change (95% CI) | p-value | |
| Among all social network members | ||||
| Weekly walking MET-minutes | ||||
| Very close relationship (intervention n=103; control n=61) | +87.58 (−149.18, +324.34) | −10.39 (−303.47, +282.68) | +97.98 (−210.95, +406.90) | 0.534 |
| Somewhat or not very close relationship (intervention n=70; control n=63) | +161.30 (−140.88, +463.48) | +70.51 (−238.93, +379.96) | +90.79 (−255.55, +437.13) | 0.607 |
| Spatially close (intervention n=98, control n=83) | +104.70 (−153.51, +362.91) | +86.48 (−180.48, +353.43) | +18.22 (−274.93, +311.38) | 0.903 |
| Not spatially close (intervention n=75, control n=41) | +105.51 (−167.52, +378.54) | −116.10 (−457.93, +225.73) | +221.61 (−150.68, +593.90) | 0.243 |
| Weekly moderate-to-vigorous MET-minutes | ||||
| Very close relationship (intervention n=98, control n=60) | +613.62 (+105.30, +1121.94) | +612.83 (−9.65, +1235.31) | +0.787 (−659.44, +661.02) | 0.998 |
| Somewhat or not very close relationship (intervention n=66, control n=58) | +502.31 (−145.53, +1150.15) | +895.30 (+223.83, +1566.77) | −392.99 (−1145.77, +359.78) | 0.306 |
| Spatially close (intervention n=93, control n=79) | +693.39 (+149.44, +1237.33) | +890.44 (+311.81, +1469.08) | −197.06 (−830.53, +436.42) | 0.542 |
| Not spatially close (intervention n=71, control n=39) | +408.30 (−176.88, +993.49) | +456.95 (−281.02, +1194.93) | −48.65 (−851.73, +754.43) | 0.906 |
| Weekly total MET-minutes | ||||
| Very close relationship (intervention n=95, control n=59) | +742.85 (+120.00, +1365.69) | +819.90 (+59.60, +1580.21) | −77.06 (−886.77, +732.65) | 0.852 |
| Somewhat or not very close relationship (intervention n=65, control n=58) | +761.89 (−32.52, +1556.30) | +1200.55 (+375.86, +2025.24) | −438.66 (−1365.53, +488.21) | 0.354 |
| Spatially close (intervention n=92, control n=78) | +867.70 (+201.69, +1533.71) | +1227.93 (+519.20, +1936.65) | −360.23 (−1133.44, +412.99) | 0.361 |
| Not spatially close (intervention n=68, control n=39) | +572.59 (−145.03, +1290.21) | +518.89 (−371.78, +1409.57) | +53.69 (−927.03, +1034.42) | 0.915 |
| Social network members who had a very close relationship with trial participants | ||||
| Weekly walking MET-minutes | ||||
| Spatially close (intervention n=52, control n=36) | −89.19 (−418.04, +239.67) | +87.23 (−298.02, +472.49) | −176.42 (−607.91, +255.07) | 0.423 |
| Not spatially close (intervention n=51, control n=25) | +14.99 (−334.83, +364.80) | −543.00 (−1005.85, −80.15) | +557.98 (+76.22, +1039.75) | 0.023 |
| Social network members who were spatially close to trial participants | ||||
| Weekly walking MET-minutes | ||||
| Very close relationship (intervention n=52, control n=36) | −101.30 (−425.58, +222.98) | +124.12 (−255.75, +503.99) | −225.43 (−654.48, +203.63) | 0.303 |
| Somewhat or not very close relationship (intervention n=46, control n=46) | +63.03 (−332.27, +458.33) | −160.66 (−540.42, +219.09) | +223.69 (−184.25, +631.64) | 0.283 |
Significant p-values are indicated in bold. 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.