Table 5.
Reliability in the Waking-Hour Time Framea
| Measurement Tool | Activity Intensity | Duration, min/d, X̅ (SD) | Differenceb (95% CI) | Significance of F Testc | ICC (95% CI) | |
|---|---|---|---|---|---|---|
| Week 1 | Week 2 | |||||
| ACT | Light (min/d) | 64.0 (33.3) | 63.6 (37.4) | 0.3 (–11.5, 12.2) | .96 | .86 (.66, .94) |
| Moderate (min/d) | 9.9 (12.8) | 8.3 (7.7) | 1.6 (–2.8, 5.9) | .46 | .82d (.56, .93) | |
| Light to moderate (min/d) | 73.8 (42.9) | 71.9 (43.9) | 1.9 (–13.0, 16.8) | .79 | .86 (.65, .94) | |
| No. of steps/d | 4,506 (2,045) | 4,352 (1,693) | 154 (–446, 754) | .60 | .89 (.70, .96) | |
| SWA | Light (min/d) | 134.0 (88.9) | 147.7 (91.0) | –12.7 (–34.0, 8.6) | .23 | .94 (.85, .98) |
| Moderate (min/d) | 45.1 (39.6) | 43.8 (34.3) | 1.3 (–8.3, 10.9) | .78 | .93 (.83, .97) | |
| Light to moderate (min/d) | 180.1 (117.6) | 191.5 (114.8) | –11.5 (–39.3, 16.4) | .40 | .94 (.85, .98) | |
| No. of steps/d | 5,992 (3,483) | 6,002 (3,127) | –10 (–774, 754) | .98 | .96 (.89, .98) | |
a
Daily physical activity duration and intraclass correlation coefficient (ICC) in 21 participants with matching data from the Actigraph (ACT) and the SenseWear Armband (SWA) in the waking-hour time frame during the 2 weeks of data collection.
b
Difference between week 1 and week 2 and corresponding 95% confidence interval (CI).
c
Significance of the F test from the analysis of variance used to calculate ICCs.
d
The point estimates of the ICCs from the ACT were not contained in the 95% Cls of the ICCs from the SWA for the duration of moderate activities.