Table 4.
Self-report (SBQ) versus objective (SWA) assessment of sedentary behaviors among participants enrolled in the SNAP trial.
| N (%) | SWA sedentary time (hours/day) |
SBQ sedentary time (hours/day) |
Difference in sedentary time hours/day (SWA − SBQ) |
p value for difference between SWA and SBQ | Absolute difference in sedentary time (Hours/day)∗ |
|
|---|---|---|---|---|---|---|
| Total sample | 562 | 9.1 ± 1.8 9.1 (8.0, 10.2) |
10.1 ± 3.5 9.6 (7.9, 11.9) |
−0.9 ± 3.5 −0.5 (−2.6, 1.2) |
<0.0001 | 2.6 ± 2.5 1.8 (0.8, 3.4) |
| Normal weight, female | 225 | 9.1 ± 1.8 9.1 (8.0, 10.3) |
9.9 ± 3.1 9.7 (7.9, 11.7) |
−0.9 ± 2.9 −0.4 (−2.7, 1.1) |
0.0002 | 2.3 ± 2.0 1.9 (0.8, 3.0) |
| Overweight, female | 215 | 8.9 ± 1.8 8.8 (7.7, 10.0) |
10.2 ± 4.0 9.8 (7.9, 12.4) |
−1.4 ± 4.0 −0.7 (−3.0, 1.2) |
<0.0001 | 3.0 ± 3.0 1.9 (1.1, 3.9) |
| Normal weight, male | 37 | 9.5 ± 2.4 9.4 (8.3, 10.2) |
9.4 ± 2.9 8.9 (7.4, 11.0) |
0.0 ± 2.9 0.1 (−1.8, 1.3) |
0.7505 | 2.1 ± 1.9 1.7 (0.9, 2.6) |
| Overweight, male | 85 | 9.7 ± 1.5 9.5 (8.7, 10.5) |
10.2 ± 3.2 9.4 (8.5, 11.4) |
−0.5 ± 3.6 −0.3 (−1.3, 1.7) |
0.7528 | 2.5 ± 2.6 1.7 (0.7, 3.4) |
Mean ± SD, median (interquartile range); SWA: SenseWear armband; SBQ: Sedentary Behavior Questionnaire. Absolute difference of the two measures (computed by taking the absolute value of the discrepancy between the self-report and objective measures for each individual, and then taking the average of these individual differences). The difference and absolute difference in sedentary time was not significantly different across the 4 groups (p ≥ 0.05).