Table 4.
Sensitivity analysis, comparison of physical activity by time and group.
|
|
Baseline to 6 weeks, estimate (95% CI) | P value | Baseline to 12 weeks, estimate (95% CI) | P value | Baseline to 24 weeks, estimate (95% CI) | P value | |
| Accelerometer-measured moderate to vigorous physical activity per weeka,b | —c | — | — | — | — | — | |
|
|
Tailoring+Fitbit (n=78) | — | — | 1.14 (0.90 to 1.42) | .26 | — | — |
|
|
Tailoring only (n=96) | — | — | 1.02 (1.01 to 1.06) | .83 | — | — |
|
|
Control (n=69) | — | — | 0.79 (0.60 to 1.05) | .10 | — | — |
|
|
Tailoring+Fitbit vs control | — | — | 1.43 (1.02 to 2.01) | .04 | — | — |
|
|
Tailoring only vs control | — | — | 1.28 (1.23 to 1.35) | .12 | — | — |
|
|
Tailoring+Fitbit vs tailoring only | — | — | 1.12 (1.20 to 1.49) | .47 | — | — |
| Self-reported total physical activity per weeka | — | — | — | — | — | — | |
|
|
Tailoring+Fitbit (n=78) | 2.27 (1.79 to 2.89) | <.001 | 2.36 (1.90 to 2.92) | <.001 | 2.08 (1.63 to 2.66) | <.001 |
|
|
Tailoring only (n=96) | 2.10 (1.62 to 2.72) | <.001 | 2.23 (1.72 to 2.86) | <.001 | 2.25 (1.77 to 2.86) | <.001 |
|
|
Control (n=69) | 1.68 (1.27 to 2.25) | <.001 | 2.20 (1.70 to 2.89) | <.001 | 2.48 (1.84 to 3.35) | <.001 |
|
|
Tailoring+Fitbit vs control | 1.34 (0.92 to 1.93) | .12 | 1.06 (1.31 to 1.49) | .71 | 0.84 (0.58 to 1.22) | .36 |
|
|
Tailoring only vs control | 1.23 (0.84 to 1.82) | .28 | 1.00 (0.69 to 1.45) | .99 | 0.90 (0.62 to 1.34) | .61 |
|
|
Tailoring+Fitbit vs tailoring only | 1.08 (0.97 to 1.17) | .66 | 1.06 (0.76 to 1.49) | .71 | 0.93 (0.67 to 1.28) | .65 |
| Accelerometer-measured sedentary time per dayb,d | — | — | — | — | — | — | |
|
|
Tailoring+Fitbit (n=78) | — | — | 34.49 (–0.33 to 69.31) | .05 | — | — |
|
|
Tailoring only (n=96) | — | — | 24.12 (–2.02 to 50.27) | .07 | — | — |
|
|
Control (n=69) | — | — | 38.09 (4.81 to 71.36) | .02 | — | — |
|
|
Tailoring+Fitbit vs control | — | — | –3.60 (–52.47 to 45.27) | .88 | — | — |
|
|
Tailoring only vs control | — | — | –13.96 (–55.92 to 27.99) | .51 | — | — |
|
|
Tailoring+Fitbit vs tailoring only | — | — | 10.36 (–32.88 to 53.61) | .64 | — | — |
| Self-reported sitting time per dayd | — | — | — | — | — | — | |
|
|
Tailoring+Fitbit (n=78) | –56.95 (–123.61 to –9.72) | .09 | –90.39 (–165.56 to –15.22) | .02 | –109.73 (–191.90 to –27.56) | .009 |
|
|
Tailoring only (n=96) | –82.83 (–151.46 to –14.21) | .02 | –56.09 (–130.50 to 18.32) | .14 | –91.71 (–171.12 to –12.31) | .02 |
|
|
Control (n=69) | –62.49 (–136.69 to 11.71) | .10 | 7.57 (–64.09 to 79.24) | .83 | –55.75 (–136.57 to 25.07) | .18 |
|
|
Tailoring+Fitbit vs control | 5.54 (–90.15 to 101.24) | .91 | –97.97 (–200.78 to 4.85) | .06 | –53.97 (–169.52 to 61.57) | .36 |
|
|
Tailoring only vs control | –20.34 (–116.74 to 76.06) | .68 | –63.66 (–161.89 to 34.56) | .20 | –35.96 (–148.64 to 76.72) | .53 |
|
|
Tailoring+Fitbit vs tailoring only | 25.89 (–68.65 to 120.43) | .59 | –34.30 (–135.56 to 66.96) | .51 | –18.01 (–123.33 to 87.30) | .74 |
aReported as percentage change.
bAnalyses controlled for accelerometer wear time.
cNot available.
dReported as mean difference.