| |
AVN Cases (evidence of AVN on MRI) n = 83
|
Non-Cases (without AVN on MRI) n = 8117
|
|---|
|
Mean age ± SD
|
50.4 ± 15.1
|
52.4 ± 15.4
|
|
Females, n (%)
|
50 (60.2)
|
4541 (55.9)
|
|
Race, n %
|
|
White
|
57 (68.7)
|
5975 (73.6)
|
|
Black
|
13 (15.7)
|
542 (6.7)
|
|
Hispanic
|
4 (4.8)
|
458 (5.6)
|
|
Asian
|
4 (4.8)
|
145 (1.8)
|
|
Other
|
0 (0)
|
64 (0.8)
|
|
Not Recorded
|
5 (6.0)
|
933 (11.5)
|
|
Co-morbiditiesa, n (%)
|
|
Rheumatoid Arthritis
|
5 (6.0)
|
205 (2.5)
|
|
Osteoarthritis
|
35 (42.2)
|
2410 (29.7)
|
|
Systemic Lupus Erythematosus
|
8 (9.6)
|
29 (0.4)
|
|
HIV
|
0 (0)
|
16 (0.2)
|
-
aDefined as ≥1 ICD-9 code within the 18-month study period using the following codes: Rheumatoid Arthritis (ICD-9714.0), Osteoarthritis (ICD-9715.X), Systemic Lupus Erythematosus (ICD-9710.0), HIV (ICD-9042).
