Table 2.
Unadjusted weight and step data for study participants
| Variable | Total n=117 |
Control No Device n=41 |
Control With Device n=40 |
Intervention n=36 |
P value |
|---|---|---|---|---|---|
| Baseline weight (kg), mean (SD) | 84.5 (20.7) | 84.8 (21.7) | 82.5 (20.7) | 86.3 (19.5) | 0.54 |
| End of study weight (kg), mean (SD)a | 86.2 (21.1) | 86.0 (22.1) | 85.5 (20.6) | 87.1 (21.0) | 0.84 |
| Change in weight (kg), mean (SD)b | 1.5 (4.5) | 1.0 (3.9) | 2.7 (5.3) | 0.81 (4.0) | 0.07 |
| Change in weight (kg), Median [IQR]b |
0.91 [−0.91 to 3.9] |
0.91 [−1.0 to 5.4] |
2.4 [−0.45 to 5.4] |
−0.45 [−1.4 to 3.4] |
0.05 |
| Variable | Total n=76 |
Control No Device --- |
Control With Device n=40 |
Intervention n=36 |
P value |
| Proportion of participant-days with ≥ 7000 steps | 0.53 | --- | 0.45 | 0.62 | <0.001 |
| Proportion of days with ≥ 7000 steps at participant level mean (SD) Median [IQR] |
0.51 (0.35) 0.51 [0.14-0.85] |
--- | 0.43 (0.34) 0.36 (0.13-0.78) |
0.60 (0.34) 0.72 [0.28-0.87] |
<0.001 |
| Daily steps throughout study period, mean (SD) Median [IQR] |
7346 (3147) 6751 [4794-9920] |
--- | 7045 (3296) 6551 [4344-6551] |
7691 (2978) 8150 [5393-10000] |
0.30 |
| End of study steps, mean (SD) Median [IQR]c |
8439 (3736) 8455 [5551-10017] |
--- | 7337 (3494) 7121 [4853-10012] |
8532 (3907) 8754 [6560-12120] |
0.19 |
| Daily steps among those with | --- |
Abbreviations: IQR=interquartile range, Kg=kilogram, SD=standard deviation
a
N=116 with baseline weight data
b
N=103 with end of study weight data
c
Steps reported for the last 2-week period of the intervention