Table 1.
Descriptive statistics of the legacy instruments including reliability and floor/ceiling effects
| Legacy Domains | Scores | Cronbach’s alpha | Floor | Ceiling | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
|
| ||||||||||
| N | Mean | Median | min | max | N | % | N | % | ||
| CESD (0–30)* | 142 | 8.7 | 8 | 0 | 27 | 0.84 | 8 | 5.6 | 0 | 0.0 |
| HAQ-DI (0–3)* | 142 | 0.9 | 0.9 | 0 | 2.6 | 0.87 | 14 | 9.9 | 0 | 0.0 |
| SF-36v.2 Physical Functioning | 143 | 35.4 | 36 | 14.9 | 57 | 0.92 | 5 | 3.5 | 6 | 4.2 |
| SF-36v.2 Role Limitations—Physical | 141 | 37.8 | 37.3 | 17.7 | 56.9 | 0.96 | 13 | 9.2 | 15 | 10.6 |
| SF-36v.2 Bodily Pain | 142 | 45.2 | 46.1 | 19.9 | 62.1 | 0.92 | 1 | 0.7 | 19 | 13.4 |
| SF-36v.2 General health | 143 | 43.6 | 43.4 | 31.5 | 55.3 | 0.73 | 0 | 0.0 | 0 | 0.0 |
| SF-36v.2 Vitality | 143 | 43.8 | 45.8 | 20.9 | 70.8 | 0.88 | 1 | 0.7 | 3 | 2.1 |
| SF-36v.2 Role Limitations--Emotional | 141 | 43.7 | 48.1 | 9.2 | 55.9 | 0.94 | 9 | 6.4 | 58 | 41.1 |
| SF-36v.2 Social Functioning | 143 | 42.6 | 45.9 | 13.2 | 56.8 | 0.89 | 1 | 0.7 | 38 | 26.6 |
| SF-36v.2 Emotional Well being | 143 | 47.2 | 50 | 7.8 | 64.1 | 0.87 | 2 | 1.4 | 1 | 0.7 |
| SF-36v.2 PCS (7–72) | 140 | 38.2 | 37.7 | 12.9 | 58.9 | 0.97 | 0 | 0 | 0 | 0 |
| SF-36v.2 MCS (6–71) | 140 | 47.8 | 50.2 | 6.2 | 69.4 | 0.97 | 0 | 0 | 0 | 0 |
| FACIT Fatigue (0–52) | 143 | 31.6 | 31 | 4 | 52 | 0.95 | 0 | 0.0 | 3 | 2.1 |
| MOS Sleep Problem index (9 items)* | 142 | 39.4 | 40.3 | 0 | 84.4 | 0.84 | 1 | 0.7 | 0 | 0.0 |
*
Higher scores indicate poor HRQOL (for other domains, a higher score indicates better HRQOL) Floor effect is presented as “worst” possible score and ceiling as “best” possible score irrespective of the direction of the scale