OBJECTIVE: To validate the ability of the American College of Rheumatology (ACR) clinical classification criteria and the ACR clinical plus radiographic classification criteria for @entity571 of the knee to predict articular @entity16 . METHODS: Ninety subjects with @entity626 ( @entity571 ) who were enrolled in a prospective study determining the therapeutic efficacy of arthroscopic irrigation were characterized as to whether they fulfilled the ACR clinical classification criteria or the ACR clinical plus radiographic classification criteria. Ten @entity309 ( @entity309 ) @entity1 were included as controls. @entity16 was defined using the ACR/Knee Arthroscopy @entity571 Scale (ACR/KAOS) system, which is a validated outcome instrument for knee @entity571 based on arthroscopic visualization. Mean values of the damage scores in each group were calculated and compared by t-test to determine statistical significance between the 3 groups. RESULTS: The mean ACR/KAOS score for the 10 @entity309 @entity1 was 1.8 [SD 1.22; range 0 to 4]. Of the 90 @entity571 @entity1 who underwent arthroscopy, only 73 @entity1 had sufficient videotape to make an accurate assessment by the blinded assessor. The mean ACR/KAOS score for the 6 @entity571 @entity1 who fulfilled only the ACR clinical classification was 17.4 [SD 11.3; range 5 to 34.3] and the mean ACR/KAOS score for the 67 @entity1 who fulfilled the ACR clinical plus radiographic classification criteria was 42.0 [SD 29.1; range 5.1 to 118.4]. These differences were statistically significant ( @entity309 versus @entity571 clinical P=0.02; @entity309 versus @entity571 clinical+radiographic P<or=0.01). Nonparametric multivariate analysis did not reveal significant correlations between ACR/KAOS scores and WOMAC global scores (r=0.11, P=0.39), @entity1 VAS (r=0.29, P=0.022), and age (r=0.29, P=0.08). CONCLUSIONS: The ACR clinical and clinical plus radiographic criteria for @entity571 of the knee accurately predict @entity16 as assessed by arthroscopy. Furthermore, the ACR clinical classification criteria identify @entity571 @entity1 with @entity16 before any radiographic change, while the ACR clinical plus radiographic classification criteria identify @entity571 @entity1 with more severe @entity16 . RELEVANCE: The ACR classification criteria correlates well with articular @entity16 in @entity1 with @entity571 .

Validation of American College of Rheumatology classification criteria for @entity626 using arthroscopically defined XXXX scores.

@entity1 :: ('9606', 'Species') :: ['patients', 'patient'] @entity626 :: ('MESH:D020370', 'Disease') :: ['knee osteoarthritis'] @entity571 :: ('MESH:D010003', 'Disease') :: ['osteoarthritis', 'OA', 'Osteoarthritis'] @entity16 :: ('MESH:D009422', 'Disease') :: ['Cartilage damage', 'cartilage damage'] @entity309 :: ('MESH:D001172', 'Disease') :: ['rheumatoid arthritis', 'RA']
@entity16 :: (MESH:D009422,Disease) :: ['cartilage damage']
