Table 1 Comparison between GMC II and GMC III group
Parameters | GMC II (n = 346) | GMC III (n = 152) | P value |
|---|---|---|---|
Age (years ± SD) | 22.5 ± 10.8 | 22.6 ± 10.3 | 0.910* |
Gender | 0.430 | ||
Male (n%) | 137 (39.6%) | 66 (43.4%) | |
Female (n%) | 209 (60.4%) | 86 (56.6%) | |
History of repeated intramuscular injections | 0.580 | ||
Yes (n, %) | 330 (95.4%) | 147 (96.7%) | |
No (n, %) | 16 (4.6%) | 5 (32.9%) | |
Unequal length of lower limbs | 0.012 | ||
Yes (n, %) | 240 (69.4%) | 122 (80.3%) | |
No (n, %) | 106 (30.6%) | 30 (19.7%) | |
Mean time of one-side surgery (min ± SD) | 26.1 ± 7.9 | 27.8 ± 11.5 | 0.445# |
Postoperative hospital stay (day ± SD) | 6.5 ± 1.2 | 7.5 ± 0.8 | 0.019* |
Obvious hip snap before first surgery | 0.059 | ||
Yes (n, %) | 276 (79.8%) | 132 (86.8%) | |
No (n, %) | 70 (20.2%) | 20 (13.2%) | |
Obvious hip snap after first surgery | 0.004 | ||
Yes (n, %) | 11 (3.2%) | 15 (9.9%) | |
No (n, %) | 335 (96.8%) | 137 (90.1%) | |
JOA score for hip joint function before first surgery (score ± SD) | 79.6 ± 6.4 | 74.8 ± 7.2 | 0.001# |
JOA score for hip joint function after first surgery (score ± SD) | 94.0 ± 3.2 | 92.5 ± 4.4 | < 0.001# |
Hip range of motion before first surgery | < 0.001^ | ||
0–120° | 2 (0.6%) | 23 (15.1%) | |
121–150° | 19 (5.5%) | 78 (51.3%) | |
151–200° | 290 (83.8%) | 49 (32.2%) | |
201–220° | 35 (10.1%) | 2 (1.3%) | |
Hip range of motion after first surgery | < 0.001^ | ||
121–150° | 9(2.6%) | 18(5.2%) | |
151–200° | 22(6.4%) | 10(6.6%) | |
201–220° | 315(91.0%) | 124(81.6%) |