Table 4

Content of the reduced NHP versions

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







(X) indicates the items included in each dimension of the reduced questionnaires Items common to the NHP20 and NHP22 questionnaires are shown in italics

Prieto et al. Health and Quality of Life Outcomes 2003 1:27   doi:10.1186/1477-7525-1-27