Table 2

Mean with SD WOMAC sum scores for the Dutch and Canadian patients

WOMACDutchCanadian
MeanSDMeanSD
Raw sum scores, with lower scores indicating less pain (range 5–25) or better physical functioning (range 17–85).
Standardised raw sum scores (range 0–100), with higher scores indicating less pain or better physical functioning.
Corrected Rasch scores, with lower scores indicating less pain (range −6.04–6.26) or better physical functioning (range −4.18–6.82).
Standardised and corrected Rasch scores (range 0–100), with higher scores indicating less pain or better physical functioning.
Pain
Raw sum score16.54.116.43.2
Standardised raw sum score42.420.543.015.9
Corrected Rasch score0.72.30.71.7
Standardised and corrected Rasch score45.018.345.614.1
Physical functioning
Raw sum score58.112.958.910.1
Standardised raw sum score39.618.938.414.9
Corrected Rasch score0.91.81.01.4
Standardised and corrected Rasch score54.016.653.312.6