Table 2.
Distributions (Mean (Standard Deviation)) of and Intraclass Correlation Coefficients (95% Confidence Interval) for Different Physical Activity Measurements in the Women’s Lifestyle Validation Study (n = 683), United States, 2010–2012
| Physical Activity Measurement |
No. of
Participants |
Mean (SD) | ICC | 95% CI |
|---|---|---|---|---|
| DLW physical activity levela | 0.57 | 0.44, 0.68 | ||
| Measurement 1 | 683 | 1.7 (0.2) | ||
| Measurement 2 | 87 | 1.7 (0.3) | ||
| DLW-determined PAEE, kcal/day | 0.42 | 0.28, 0.58 | ||
| Measurement 1 | 683 | 709 (241) | ||
| Measurement 2 | 87 | 706 (285) | ||
| DLW-determined TEE, kcal/day | 0.74 | 0.66, 0.81 | ||
| Measurement 1 | 683 | 2,194 (360) | ||
| Measurement 2 | 87 | 2,158 (390) | ||
| DLW body fat mass, % | 0.83 | 0.76, 0.87 | ||
| Measurement 1 | 683 | 38 (8) | ||
| Measurement 2 | 87 | 38 (7) | ||
| Total physical activity (not including sedentary time) | ||||
| PAQ, MET-hours/day | 0.58 | 0.53, 0.63 | ||
| PAQ1 | 683 | 8.2 (5.0) | ||
| PAQ2 | 683 | 8.1 (4.8) | ||
| ACT24, MET-hours/day | 0.41 | 0.36, 0.47 | ||
| Phase 1 | 683 | 16.1 (9.1) | ||
| Phase 2 | 616 | 16.6 (9.5) | ||
| Phase 3 | 501 | 16.2 (8.4) | ||
| Phase 4 | 268 | 16.1 (8.1) | ||
| Accelerometer | ||||
| Total activity counts/day | 0.78 | 0.75, 0.81 | ||
| Phase 1 | 683 | 588,069 (179,367) | ||
| Phase 2 | 662 | 585,181 (173,407) | ||
| MET-hours/day | 0.77 | 0.74, 0.80 | ||
| Phase 1 | 683 | 29.8 (2.2) | ||
| Phase 2 | 662 | 29.8 (2.1) | ||
| Moderate-to-vigorous physical activity | ||||
| PAQ, MET-hours/day | 0.71 | 0.67, 0.74 | ||
| PAQ1 | 683 | 4.3 (4.5) | ||
| PAQ2 | 683 | 4.3 (4.2) | ||
| ACT24, MET-hours/day | 0.18 | 0.14, 0.24 | ||
| Phase 1 | 683 | 6.7 (8.5) | ||
| Phase 2 | 616 | 7.5 (9.3) | ||
| Phase 3 | 501 | 7.4 (8.0) | ||
| Phase 4 | 268 | 7.2 (7.4) | ||
| Accelerometer, hours/day | 0.77 | 0.74, 0.80 | ||
| Phase 1 | 683 | 0.7 (0.4) | ||
| Phase 2 | 662 | 0.7 (0.4) | ||
| Vigorous activity | ||||
| PAQ, MET-hours/day | 0.67 | 0.62, 0.71 | ||
| PAQ1 | 683 | 1.6 (2.6) | ||
| PAQ2 | 683 | 1.6 (2.6) | ||
| ACT24, MET-hours/day | 0.21 | 0.17, 0.26 | ||
| Phase 1 | 683 | 0.9 (2.8) | ||
| Phase 2 | 616 | 1.4 (4.3) | ||
| Phase 3 | 501 | 1.4 (3.9) | ||
| Phase 4 | 268 | 1.4 (3.6) | ||
| Accelerometer, hours/day | 0.59 | 0.54, 0.64 | ||
| Phase 1 | 683 | 0.04 (0.1) | ||
| Phase 2 | 662 | 0.03 (0.1) | ||
| Moderate activity | ||||
| PAQ, MET-hours/day | 0.64 | 0.60, 0.68 | ||
| PAQ1 | 683 | 2.7 (2.9) | ||
| PAQ2 | 683 | 2.7 (2.8) | ||
| ACT24, MET-hours/day | 0.17 | 0.13, 0.22 | ||
| Phase 1 | 683 | 5.8 (8.1) | ||
| Phase 2 | 616 | 6.1 (8.3) | ||
| Phase 3 | 501 | 5.9 (7.1) | ||
| Phase 4 | 268 | 5.8 (6.9) | ||
| Accelerometer, hours/day | 0.76 | 0.73, 0.79 | ||
| Phase 1 | 683 | 0.6 (0.4) | ||
| Phase 2 | 662 | 0.6 (0.4) | ||
| Sedentary time | ||||
| PAQ, hours/day | 0.35 | 0.29, 0.42 | ||
| PAQ1 | 681 | 3.1 (1.3) | ||
| PAQ2 | 681 | 3.1 (1.3) | ||
| ACT24, hours/day | 0.35 | 0.29, 0.41 | ||
| Phase 1 | 683 | 7.1 (3.2) | ||
| Phase 2 | 616 | 7.3 (3.1) | ||
| Phase 3 | 501 | 7.2 (3.0) | ||
| Phase 4 | 268 | 7.5 (3.1) | ||
| Accelerometer, hours/day | ||||
| Including every minute | 0.69 | 0.65, 0.73 | ||
| Phase 1 | 683 | 8.0 (1.4) | ||
| Phase 2 | 662 | 7.9 (1.4) | ||
| Including bouts of ≥15 minutes | 0.71 | 0.67, 0.74 | ||
| Phase 1 | 683 | 3.7 (1.4) | ||
| Phase 2 | 662 | 3.7 (1.4) | ||
| Resting pulse rate, beats/minute | 0.60 | 0.56, 0.63 | ||
| Measurement 1 | 677 | 68.7 (8.5) | ||
| Measurement 2 | 671 | 69.2 (7.7) | ||
| Measurement 3 | 641 | 68.5 (7.9) | ||
| Measurement 4 | 675 | 68.6 (8.3) |
Abbreviations: ACT24, Activities Completed Over Time in 24 Hours; CI, confidence interval; DLW, doubly labeled water; ICC, intraclass correlation coefficient; MET, metabolic equivalent of task; PAEE, physical activity energy expenditure; PAQ, physical activity questionnaire; TEE, total energy expenditure.
a DLW physical activity level was calculated as the ratio of DLW-determined TEE to resting metabolic rate.