Table 2 Accelerometer and questionnaire data provision rates by trial arm at baseline, Time 1 and Time 2.
| Â | Control, n (%) | Intervention, n (%a) | Total, n (% a) |
|---|---|---|---|
Time 0 | |||
 Accelerometer returned | 153 (96.84) | 258 (96.27) | 411 (96.48) |
 Accelerometer validb | 128 (81.01) | 224 (83.58) | 352 (82.63) |
 Accelerometer invalidc | 25 (15.82) | 34 (12.69) | 59 (13.85) |
 Accelerometer missingd | 5 (3.16) | 10 (3.73) | 15 (3.52) |
 Psychosocial questionnaire | 157 (99.37) | 269 (100.00) | 426 (99.77) |
Time 1 | |||
 Accelerometer returned | 135 (85.44) | 255 (95.15) | 390 (91.55) |
 Accelerometer valid | 107 (67.72) | 196 (73.13) | 303 (71.13) |
 Accelerometer invalid | 27 (17.09) | 54 (20.15) | 81 (19.01) |
 Accelerometer missing | 24 (15.19) | 18 (6.71) | 42 (9.86) |
 Psychosocial questionnaire | 144 (91.14) | 257 (95.54) | 401 (93.91) |
Time 2 | |||
 Accelerometer returned | 140 (88.61) | 241 (89.93) | 381 (89.44) |
 Accelerometer valid | 91 (57.59) | 174 (64.93) | 265 (62.21) |
 Accelerometer invalid | 44 (27.85) | 66 (24.63) | 110 (25.82) |
 Accelerometer missing | 23 (14.56) | 28 (10.45) | 51 (11.97) |
 Psychosocial questionnaire | 144 (91.14) | 251 (93.31) | 395 (92.51) |
Time 0 and Time 1 | |||
 Valid accelerometer data | 95 (60.13) | 177 (66.04) | 272 (63.85) |
 Psychosocial questionnaire | 144 (91.14) | 257 (95.54) | 401 (93.91) |
Time 0 and Time 2 | |||
 Valid accelerometer data | 81 (51.27) | 162 (60.45) | 243 (57.04) |
 Psychosocial questionnaire | 144 (91.14) | 251 (93.31) | 395 (92.51) |