Table 1 Patient characteristics
Characteristic | Total | Necrosis of femoral head | Correlation to necrosis | |
|---|---|---|---|---|
No | Yes | |||
n = 32 | n = 15 (46.9%) | n = 17 (53.1%) | ||
Age (years) | ||||
Mean ± SD | 11.0 ± 5.7 | 11.1 ± 6.1 | 10.9 ± 5.4 | |
Range | 3.3–27.0 | 3.4–23.6 | ||
Sex—no. (%) | ||||
Male | 21 (65.6) | 8 (38.1) | 13 (61.9) | p = 0.266 |
Female | 11 (34.4) | 7 (63.6) | 4 (36.4) | |
MPS subtype—no. (%) | ||||
IIIA | 26 (81.2) | 13 (50.0) | 13 (50.0) | p = 0.795 |
IIIB | 4 (12.5) | 1 (25.0) | 3 (75.0) | |
IIIC | 2 (6.2) | 1 (50.0) | 1 (50.0) | |
Phenotype—no./total no.(%) | ||||
Severe | 23/30 (76.7) | 9 (39.1) | 14 (60.9) | p = 0.036* |
Intermediate | 7/30 (23.3) | 6 (85.7) | 1 (14.3) | |
Dysplasia—no. (%) | ||||
No | 23 (71.9) | 13 (56.5) | 10 (43.5) | p = 0.04* |
Yes | 9 (28.1) | 2 (22.2) | 7 (77.8) | |