Table 1 Demographic data for the two groups
Variables | The modified trapdoor group (N = 67) | The “light bulb” group (N = 72) | P value |
|---|---|---|---|
Age (year) | 36.3 ± 5.3 | 38.5 ± 4.1 | 0.894 |
Male:female | 41:26 | 43:29 | |
Mean preop. Harris hip score (points) | 67.3 ± 7.5 | 68.2 ± 6.3 | 0.910 |
Etiology (no. of hips) | 0.946 | ||
Alcohol use | 37 | 38 | |
Use of corticosteroids | 20 | 22 | |
Idiopathic etiology | 10 | 12 | |
Preoperative stage | 0.685 | ||
ACRO II | 45 | 46 | |
ARCO III | 22 | 26 | |
Size | 0.982 | ||
B | 25 | 27 | |
C | 42 | 45 | |
Location | 0.916 | ||
B | 12 | 11 | |
C1 | 29 | 32 | |
C2 | 26 | 29 |