Table 4 Content of the reduced NHP versions
From: Classical test theory versus Rasch analysis for quality of life questionnaire reduction
| Original NHP38 dimensions | Classical Test Theory reduction NHP20 | Rasch reduction NHP22 | ||||
|---|---|---|---|---|---|---|
| Emotional | Physical | Sleep | Pain | Physical | Psychological | |
| Energy | ||||||
| EN1 I'm tired all the time | X | |||||
| EN2 Everything is an effort | ||||||
| EN3 I soon run out of energy | X | |||||
| Pain | ||||||
| P1 I have pain at night | X | |||||
| P2 I have unbearable pain | X | |||||
| P3 I find it painful to change position | X | X | ||||
| P4 I'm in pain when I walk | X | |||||
| P5 I'm in pain when I'm standing | ||||||
| P6 I'm in constant pain | X | |||||
| P7 I'm in pain when going up/down stairs | X | |||||
| P8 I'm in pain when I'm sitting | X | X | ||||
| Emotional Reactions | ||||||
| EM1 Things are getting me down | X | X | ||||
| EM2 I've forgotten how to enjoy myself | X | X | ||||
| EM3 I'm feeling on edge | X | |||||
| EM4 These days seem to drag | X | X | ||||
| EM5 I lose my temper easily these days | ||||||
| EM6 I feel as if I'm losing control | X | X | ||||
| EM7 Worry is keeping me awake at night | ||||||
| EM8 I feel that life is not worth living | ||||||
| EM9 I wake up feeling depressed | X | X | ||||
| Sleep | ||||||
| SL1 I take tablets to help me sleep | ||||||
| SL2 I'm waking in the early hours ... | X | |||||
| SL3 I lie awake for most of the night | X | X | ||||
| SL4 It takes me long time to get to sleep | X | X | ||||
| SL5 I sleep badly at night | X | X | ||||
| Social Isolation | ||||||
| SO1 I feel lonely | ||||||
| SO2 I'm finding it hard to contact people | X | |||||
| SO3 I feel there is nobody I am close to | ||||||
| SO4 I feel I am a burden to people | X | |||||
| SO5 I'm finding hard to get on with people | X | |||||
| Physical Mobility | ||||||
| PM1 I can only walk about indoors | X | |||||
| PM2 I find it hard to bend | X | X | ||||
| PM3 I'm unable to walk at all | X | |||||
| PM4 I have trouble getting up/down | X | X | ||||
| stairs | ||||||
| PM5 I find it hard to reach for things | X | |||||
| PM6 I find it hard to dress myself | X | |||||
| PM7 I find it hard to stand for long | X | |||||
| PM8 I need help to walk about outside | ||||||