Table 1.
Item difficulty, Rasch fit statistics for each item ( N = 236)
| Domain | Mean (SD) | Difficulty | Infit | Outfit |
|---|---|---|---|---|
| Item | ||||
| Physical | 12.18 (1.92) | -- | -- | -- |
| Ph1: Pain and discomfort | 2.57 (1.00) | −0.11 | 1.77 | 1.89 |
| Ph2: Medication | 2.62 (1.00) | −0.81 | 1.56 | 1.66 |
| Ph3: Energy and fatigue | 3.18 (0.87) | 0.42 | 0.67 | 0.67 |
| Ph4: Mobility | 3.62 (0.84) | −0.53 | 0.88 | 0.81 |
| Ph5: Sleep and rest | 2.99 (1.00) | 0.80 | 0.93 | 0.95 |
| Ph6: Activities of daily living | 3.31 (0.79) | 0.15 | 0.47 | 0.46 |
| Ph7: Work capacitya | 3.35 (0.94) | 0.08 | 0.77 | 0.73 |
| Psychological | 12.33 (2.47) | -- | -- | -- |
| Ps1: Positive feelings | 2.43 (1.01) | 1.50 | 1.16 | 1.17 |
| Ps2: Spirit/ religion/ beliefs | 3.16 (1.12) | −0.04 | 0.92 | 0.82 |
| Ps3: Think | 3.16 (1.00) | −0.04 | 0.71 | 0.69 |
| Ps4: Body image | 3.54 (0.94) | −0.91 | 1.08 | 1.04 |
| Ps5: Self-esteem | 3.36 (0.89) | 0.78 | 1.01 | 0.98 |
| Ps6: Negative feelings a | 2.84 (0.97) | −0.03 | 1.56 | 1.63 |
| Social | 12.98 (3.00) | -- | -- | -- |
| S1: Personal relationship | 3.39 (0.81) | −0.51 | 0.87 | 0.89 |
| S2: Sexual activity | 3.03 (1.02) | 0.72 | 1.01 | 0.98 |
| S3: Social support | 3.38 (0.94) | −0.48 | 1.20 | 1.11 |
| S4: Being respecteda | 3.17 (0.91) | 0.27 | 0.81 | 0.76 |
| Environment | 12.89 (2.65) | -- | -- | -- |
| E1: Safety and security | 3.25 (1.01) | −0.02 | 1.08 | 0.99 |
| E2: Physical environment | 3.24 (0.94) | 0.01 | 1.05 | 1.05 |
| E3: Financial resources | 2.43 (1.06) | 1.76 | 0.99 | 0.97 |
| E4: Information acquiring | 3.01 (0.98) | 0.51 | 0.84 | 0.83 |
| E5: Leisure activities | 3.00 (1.01) | 0.55 | 1.05 | 1.06 |
| E6: Home environment | 3.55 (0.79) | −0.76 | 0.77 | 0.73 |
| E7: Health services | 3.53 (0.85) | −0.72 | 1.14 | 1.16 |
| E8: Transportation | 3.42 (0.82) | −0.43 | 0.90 | 0.86 |
| E9: Eatinga | 3.60 (0.86) | −0.90 | 1.12 | 1.14 |
aAnchored item.
Reversely coded items are in italics; misfit values are in bold.