Table 3
Mean (SEM) calibrations and strata for PF-10 based on the ALS-HPS sample (n=446)
| n | Average item calibration (logit) | SEM | Infit statistic | Strata | Item order in population survey | |
| Vigorous activities | 278 | 3.31 | 0.18 | −0.7 | 7 | 10 |
| Walking more than a mile | 277 | 0.65 | 0.13 | 0.0 | 6 | 7 |
| Moderate activities | 275 | 0.58 | 0.13 | −1.7 | 6 | 5 |
| Lifting or carrying groceries | 278 | 0.42 | 0.13 | −0.3 | 5 | 6 |
| Climbing several flights of stairs | 277 | 0.40 | 0.13 | 0.5 | 5 | 9 |
| Bending, kneeling, or stooping | 279 | −0.29 | 0.13 | −0.5 | 4 | 8 |
| Walking half a mile | 276 | −0.48 | 0.13 | −1.7 | 3 | 4 |
| Bathing or dressing | 281 | −1.14 | 0.12 | 6.3 | 2 | 2 |
| Climbing one flight of stairs | 278 | −1.66 | 0.13 | −2.4 | 1 | 3 |
| Walking 100 yards | 272 | −1.80 | 0.13 | −1.6 | 1 | 1 |
