TABLE III.
Psychometric Properties of PROMIS CAT Domains by Age, Sex, and Race
| PROMIS CAT Domain and Variable | Age in Yr | P Value* | Sex | P Value* | Race | P Value* | ||||
| 18-39 | 40-59 | ≥60 | Female | Male | Caucasian | Not Caucasian | ||||
| Upper extremity | ||||||||||
| Floor effects (%) | 0.0 | 0.8 | 1.1 | 0.333 | 1.2 | 0.5 | 0.205 | 0.9 | 0.7 | 0.716 |
| Ceiling effects (%) | 3.1 | 1.0 | 0.5 | 0.009 | 0.5 | 1.7 | 0.055 | 1.4 | 0.7 | 0.279 |
| Time to completion (TTC)† (sec) | 41.2 ± 31.6 | 51.5 ± 40.6 | 59.2 ± 43.3 | <0.001 | 53.9 ± 44.5 | 52.8 ± 37.6 | 0.659 | 52.2 ± 41.2 | 55.4 ± 40.7 | 0.205 |
| No. of questions†‡ | 5.4 ± 2.6 | 4.7 ± 1.8 | 4.6 ± 1.7 | <0.001 | 4.4 ± 1.4 | 5.1 ± 2.2 | <0.001 | 4.8 ± 1.9 | 4.7 ± 1.9 | 0.337 |
| Physical function | ||||||||||
| Floor effects (%) | 0.0 | 0.0 | 0.0 | — | 0.0 | 0.0 | — | 0.0 | 0.0 | — |
| Ceiling effects (%) | 0.6 | 0.0 | 0.0 | 0.139 | 0.2 | 0.3 | 0.716 | 0.1 | 0.4 | 0.392 |
| Time to completion (TTC)† (sec) | 46.0 ± 42.2 | 47.3 ± 44.6 | 49.1 ± 29.6 | 0.659 | 46.1 ± 38.0 | 47.6 ± 40.7 | 0.569 | 44.4 ± 31.7 | 51.6 ± 51.9 | 0.014 |
| No. of questions†‡ | 4.3 ± 1.1 | 4.1 ± 0.5 | 4.1 ± 0.4 | <0.001 | 4.1 ± 0.7 | 4.2 ± 0.8 | 0.370 | 4.2 ± 0.8 | 4.2 ± 0.8 | 0.948 |
| Pain interference | ||||||||||
| Floor effects (%) | 2.4 | 0.9 | 0.9 | 0.015 | 0.9 | 1.5 | 0.205 | 1.6 | 0.7 | 0.083 |
| Ceiling effects (%) | 0.0 | 0.1 | 0.1 | 0.765 | 0.1 | 0.0 | 0.205 | 0.1 | 0.1 | 0.769 |
| Time to completion (TTC)† (sec) | 44.9 ± 43.4 | 47.4 ± 33.6 | 58.0 ± 45.8 | <0.001 | 49.6 ± 41.4 | 51.2 ± 40.8 | 0.391 | 49.5 ± 39.9 | 52.1 ± 42.9 | 0.163 |
| No. of questions†‡ | 4.3 ± 1.4 | 4.2 ± 0.9 | 4.2 ± 0.9 | 0.009 | 4.2 ± 0.9 | 4.2 ± 1.2 | 0.229 | 4.2 ± 1.1 | 4.2 ± 1.0 | 0.621 |
| Depression | ||||||||||
| Floor effects (%) | 21.0 | 17.4 | 15.4 | 0.020 | 15.6 | 19.5 | 0.015 | 17.6 | 17.6 | 0.989 |
| Ceiling effects (%) | 0.0 | 0.0 | 0.0 | — | 0.0 | 0.0 | — | 0.0 | 0.0 | — |
| Time to completion (TTC)† (sec) | 39.2 ± 110.5 | 28.1 ± 76.4 | 26.3 ± 73.8 | 0.014 | 26.5 ± 64.9 | 33.9 ± 101.0 | 0.044 | 30.5 ± 85.0 | 30.1 ± 87.0 | 0.931 |
| No. of questions†‡ | 6.8 ± 3.6 | 6.4 ± 3.4 | 6.4 ± 3.4 | 0.085 | 6.3 ± 3.3 | 6.7 ± 3.5 | 0.003 | 6.5 ± 3.4 | 6.5 ± 3.5 | 0.864 |
*
P values from comparison of psychometric properties among groups for the given row. When comparing age groups, the T-scores, TTC, and number of questions were compared using 1-way ANOVA, and floor and ceiling effects were compared using chi-square tests. When comparing sex and race groups, the T-scores, TTC, and number of questions were compared with independent samples t tests, and floor and ceiling effects were compared with chi-square tests. Bold indicates a significant value.
†
The values are given as the mean and standard deviation.
‡
Question burden.