Table 2.
Monitor and questionnaire sedentary time, sensitivity, and specificity using the AP as the criterion measure.
| Baseline period | Intervention period | Sensitivity | Specificity | ||
|---|---|---|---|---|---|
| mean ± SD | mean ± SD | (95% CI) | (95% CI) | ||
| Weekday | AP (% Sedentary) | 68.8 ± 8.5 | 65.1 ± 6.5* | — | — |
| AG100 (% Sedentary) | 66.4 ± 10.2 | 62.9 ± 10.5 | 80 (53,100)† | 67 (39,94) | |
| AG150 (% Sedentary) | 70.5 ± 9.4 | 67.1.4 ± 10.1 | 70 (43,97) | 67 (39,94) | |
| T-SQ (hours/day) | 9.3 ± 3.3 | 8.2 ± 4.4 | 80 (53,100)† | 33 (06,61) | |
| D-SQ (hours/day) | 12.6 ± 2.9 | 11.6 ± 2.2 | 70 (43,100)† | 33 (06,61) | |
| TV-Q (hours/day) | 2.3 ± 1.85 | 2.5 ± 1.75 | 20 (0,47) | 100 (73,100)† | |
| Weekend | AP (% Sedentary) | 60.4 ± 15.6 | 57.3 ± 12.1 | — | — |
| AG100 (% Sedentary) | 62.7 ± 8.9 | 64.4 ± 7.3 | 67 (38,95) | 71 (43,100)† | |
| AG150 (% Sedentary) | 66.7 ± 9.0 | 69.0 ± 6.2 | 57 (29,85) | 80 (52,100)† | |
| T-SQ (hours/day) | 6.2 ± 3.1 | 6.0 ± 3.3 | 57 (29, 85) | 60 (32, 88) | |
| D-SQ (hours/day) | 12.1 ± 5.0 | 10.7 ± 3.9 | 57 (29, 85) | 60 (32, 88) | |
| TV-Q (hours/day) | 3.4 ± 2.14 | 3.3 ± 1.60 | 43 (15, 71) | 100 (72, 100)† | |
Note: AP is activPAL, AG100 is ActiGraph cut-point of 100 counts·min−1, AG150 is ActiGraph 150 cut-point of 150 counts·min−1, T-SQ is total daily sitting questionnaire, D-SQ is domain specific questionnaire, TV-Q is the D-SQ question specifically about TV viewing.
Data included 13 participants with valid data for all measures during both the baseline and intervention period.
AP, AG100, and AG150 are expressed as a percentage (total sedentary time/wear time) to adjust for differences in wear time.
*Indicates statistically significant difference between conditions P < 0.01.
†Indicates significant sensitivity or specificity (P < 0.05).