Table 4.
- Rasch analysis, item difficulty and fit statistics.
| Domain/item number* | Activity MET value | Difficulty (SE) | Infit mean square (SE) | Outfit mean square (SE) | |
|---|---|---|---|---|---|
| Household activity | |||||
| 12 | Watching TV | 1.0 | -0.56 (0.08) | 1.30 (2.43) | 1.31 (2.46) |
| 13 | Sitting and reading or talking on the phone | 1.1 | -0.88 (0.08) | 1.07 (0.62) | 1.22 (1.58) |
| 11 | Sitting and writing or using computer | 1.8 | -0.62 (0.06) | 1.46 (3.74) | 1.77 (5.01) |
| 5 | Childcare while sitting | 2.0 | -0.41 (0.06) | 0.76 (-2.35) | 0.75 (-1.95) |
| 15 | Light cleaning | 2.3 | -0.48 (0.08) | 0.89 (-0.85) | 0.84 (-1.19) |
| 16 | Shopping | 2.3 | -0.14 (0.08) | 1.14 (1.05) | 1.12 (0.85) |
| 4 | Preparing meals | 2.5 | -0.77 (0.08) | 0.91 (-0.75) | 0.91 (-0.69) |
| 7 | Playing with children while sitting or standing | 2.7 | -0.06 (0.08) | 0.80 (-1.55) | 0.74 (-1.95) |
| 17 | Heavier cleaning in the house | 2.8 | -0.29 (0.07) | 1.04 (0.34) | 1.07 (0.51) |
| 18 | Mowing lawn on riding mower or cleaning the front or backyards | 2.8 | 0.63 (0.12) | 1.00 (0.06) | 0.80 (-0.65) |
| 6 | Childcare while standing | 3.0 | -0.21 (0.07) | 0.71 (-2.58) | 0.66 (-2.71) |
| 9 | Carrying children | 3.0 | 0.23 (0.09) | 0.91 (-0.36) | 0.74 (-1.09) |
| 14 | Playing with pets | 3.2 | 1.04 (0.21) | 1.06 (0.29) | 1.44 (0.99) |
| 8 | Playing with children while walking or running | 4.0 | 0.33 (0.10) | 0.98 (-0.08) | 0.87 (-0.64) |
| 10 | Taking care of an older adult | 4.0 | 0.81 (0.18) | 1.05 (0.27) | 1.07 (0.34) |
| 19 | Mowing lawn or gardening | 4.4 | 1.38 (0.24) | 1.01 (0.13) | 0.99 (0.06) |
| Transportation | |||||
| 22 | Driving or riding a car or a bus | 1.5 | -0.55 (0.13) | 1.07 (0.49) | 0.94 (-0.37) |
| 20 | Walking slowly to go places | 2.5 | 0.05 (0.14) | 0.86 (-0.81) | 0.87 (-0.82) |
| 21 | Walking quickly to go places | 4.0 | 0.50 (0.15) | 1.04 (0.31) | 1.00 (0.05) |
| Leisure/sports activity | |||||
| 23 | Walking slowly | 3.2 | -1.03 (0.16) | 0.88 (-0.80) | 0.88 (-0.82) |
| 27 | Prenatal exercise classes | 3.5 | 0.43 (0.32) | 0.88 (-0.21) | 2.09 (1.22) |
| 29 | Dancing | 4.5 | 0.64 (0.27) | 1.65 (1.58) | 1.37 (0.76) |
| 24 | Walking quickly | 4.6 | -0.57 (0.18) | 0.82 (-1.22) | 0.75 (-1.63) |
| 28 | Swimming | 6.0 | 0.90 (0.36) | 0.75 (-0.30) | 4.09 (1.76) |
| 25 | Walking quickly up hills | 6.5 | -1.03 (0.20) | 1.09 (0.70) | 1.08 (0.55) |
| 26 | Jogging | 7.0 | 0.66 (0.28) | 0.80 (-0.53) | 1.57 (0.97) |
| Occupational activity | |||||
| 32 | Sitting | 1.6 | -1.71 (0.16) | 1.15 (0.76) | 1.01 (0.11) |
| 34 | Standing or walking slowly not carrying things | 2.2 | -0.51 (0.16) | 0.90 (-0.42) | 0.89 (-0.43) |
| 33 | Standing or walking slowly while carrying things | 3.0 | 0.32 (0.18) | 1.01 (0.13) | 0.91 (-0.21) |
| 36 | Walking quickly not carrying things | 3.3 | 0.58 (0.18) | 0.87 (-0.44) | 0.95 (-0.07) |
| 35 | Walking quickly while carrying things | 4.0 | 1.32 (0.25) | 1.24 (0.92) | 0.99 (-0.17) |
SE: standard error; *Items listed ascendingly according to the MET value for its activity