Table 5

Prevalence of cartilage abnormalities (cartilage WORMS >0 and WORMS ≥2) in the incidence and control groups by compartment

Prevalence of WORMS >0


Medial

Lateral

Groupa, b

Femur

Tibia

Femur

Tibia

Patella

Incidence group (n = 92)

11 (12.5%)

4 (4.5%)

8 (9.0%)

17 (19.3%)

48 (54.5%)

Control group (n = 53)

5 (11.1%)

1 (2.2%)

2 (4.4%)

10 (22.2%)

26 (57.7%)

Prevalence of WORMS ≥2

Medial

Lateral

Groupa, b

Femur

Tibia

Femur

Tibia

Patella

Incidence group (n = 92)

10 (11.3%)

3 (3.4%)

6 (6.8%)

10 (11.3%)

25 (28.4%)

Control group (n = 53)

3 (6.6%)

0 (0.0)%

1 (2.2%)

4 (8.8%)

11 (24.4%)


aAll P values were greater than 0.05 using a logistic regression both when unadjusted and when adjusted for age, body mass index, and gender. bEight subjects from the control group and four subjects from the incidence group did not have whole-organ magnetic resonance imaging score (WORMS) readings available. Various subjects had lesions in multiple compartments.

Joseph et al. Arthritis Research & Therapy 2011 13:R153   doi:10.1186/ar3469

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