Table 3.

WORMS cartilage lesion scoring presented for both cohorts. The cartilage was scored per compartment on an 8-point scale from 0 to 6, with 0 meaning “normal (healthy) cartilage”, to 6 representing “highly degenerated cartilage with ≥ 75% of areas with full thickness cartilage loss”.^*

Results were pooled to derive an overall cartilage lesion score for the whole knee joint..

WORMS Cartilage	Subjects		P-value
	African American n = 100	Caucasian American n = 100
WORMS Cartilage lesion scoreˆ
Global knee joint	3.61 [3.03–4.17]	3.62 [3.14–4.10]	0.970
Lateral Femur	0.32 [0.17–0.46]	0.29 [0.16–0.42]	0.804
Lateral Tibia	0.57 [0.39–0.77]	0.62 [0.45–0.76]	0.686
Medial Femur	0.58 [0.36–0.79]	0.45 [0.28–0.61]	0.306
Medial Tibia	0.09 [0.00–0.17]	0.02 [−0.01–0.05]	0.150
Patella	2.05 [1.76–2.34]	2.26 [1.97–2.55]	0.337
WORMS Grade = 0
Lateral Femur (n %)	83 (100)	80 (100)	0.578
Lateral Tibia (n %)	64 (100)	54 (100)	0.157
Medial Femur (n %)	72 (100)	74 (100)	0.732
Medial Tibia (n %)	95 (100)	98 (100)	0.257
Patella (n %)	14 (100)	9 (100)	0.297
WORMS Grade = 0 and 1
Lateral Femur (n %)	88 (100)	93(100)	0.251
Lateral Tibia (n %)	85 (100)	89(100)	0.394
Medial Femur (n %)	82(100)	85(100)	0.549
Medial Tibia (n %)	98(100)	100 (100)	0.157
Patella (n %)	45(100)	39(100)	0.396
WORMS Grade ≥ 2
Lateral Femur (n %)	12(100)	7(100)	0.251
Lateral Tibia (n %)	15(100)	11(100)	0.394
Medial Femur (n %)	18(100)	15(100)	0.549
Medial Tibia (n %)	2(100)	0(0)	0.157
Patella (n %)	55(100)	61(100)	0.396

^ˆData are given as mean values [95% Confidence Intervals ]

^*A detailed outline of the WORMS cartilage lesion scoring system is given in Table 1.