Em. Roos et al., WOMAC Osteoarthritis Index - additional dimensions for use in subjects with post-traumatic osteoarthritis of the knee, OSTEO CART, 7(2), 1999, pp. 216-221
Objective: To compare the sensitivity of WOMAC and the two added dimensions
Sport and Recreation Function and Knee Related Quality of Life in subjects
with radiographic. knee OA to that in controls. To study the influence of
age on the reported outcomes.
Design: Outcomes were compared between subjects having had meniscectomy 21
years ago and which at time of follow-up had definite radiographic OA (N=41
, mean age 57), and age- and sex-matched controls without radiographic OA (
N=50, mean age 53). For the purpose of studying the impact of age, the grou
ps were divided in two age groups, younger and older than 50 years, respect
ively. Close to 50% of both groups reported current physical activity level
s of at least recreational golf, dancing, hiking, etc.
Symptoms and function were assessed by WOMAC Osteoarthritis Index and the a
dded dimensions Sport and Recreational Function (Sport/Rec) and Knee Relate
d Quality of Life (QOL). A percentage score was calculated, 0 indicating ex
treme knee problems and 100 indicating no knee problems.
Results: The control group had mean scores of 88-98 for the different dimen
sions. The OA group scored significantly lower in all dimensions (P<0.0001)
. The most discriminative dimensions in both age groups were Sport/Rec and
QOL with mean scores of 52 and 59 (ranges 0-100).
Conclusion: The dimensions Sport and Recreation Function, and Knee Related
QOL were highly sensitive and discriminant outcomes in both age groups and
should be assessed in addition to WOMAC in subjects with post-traumatic ost
eoarthritis of the knee.