Table 3 Reduced NHP version obtained through Rasch Analysis: the NHP22
From: Classical test theory versus Rasch analysis for quality of life questionnaire reduction
PHYSICAL SCALE | ||||
|---|---|---|---|---|
ITEMS | ANCHORED MEASURE | SE | INFIT MNSQ | OUTFIT MNSQ |
PM3-UNABLE TO WALK | 76.1 | .62 | .82 | .96 |
PM1-WALKING LIMITED | 64.1 | .51 | 1.03 | 1.35 |
P2-AWFUL PAIN | 59.7 | .47 | .89 | .92 |
PM6-HARD TO DRESS | 55.7 | .45 | .83 | .72 |
P8-PAIN SITTING | 53.1 | .44 | .93 | .90 |
PM5-HARD TO REACH | 47.5 | .42 | .83 | .74 |
EN3-OUT OF ENERGY | 44.7 | .41 | .99 | .99 |
P3-CHANGE PAIN | 41.5 | .41 | .96 | .97 |
P4-WALK PAIN | 39.1 | .41 | .92 | .91 |
PM2-HARD TO BEND | 34.8 | .41 | .90 | .93 |
PM4-STAIRS HARD | 25.2 | .43 | .99 | 1.50 |
PSYCHOLOGICAL SCALE | ||||
ITEMS | ANCHORED MEASURE | SE | INFIT MNSQ | OUTFIT MNSQ |
SO5-PEOPLE HARD | 68.6 | .55 | 1.00 | 1.17 |
SO2-CONTACT HARD | 60.6 | .48 | .96 | 1.03 |
SO4-I'M A BURDEN | 58.6 | .46 | .98 | 1.02 |
EM4-DAYS DRAG | 56.1 | .44 | .90 | .89 |
EM6-NO CONTROL | 55.0 | .44 | .90 | .88 |
EM9-DEPRESSED | 48.1 | .41 | .86 | .81 |
EM2-JOY FORGOTTEN | 44.9 | .41 | 1.06 | 1.11 |
SL3-CAN'T SLEEP | 44.0 | .40 | .93 | .88 |
SL5-SLEEPS BADLY | 40.8 | .40 | .89 | .86 |
SL4-SLOW TO SLEEP | 39.2 | .40 | 1.02 | 1.08 |
EM1-GETTING ME DOWN | 36.8 | .43 | 1.20 | 1.34 |