Table 2.
Postoperative results
| CSLP group (n = 34) | MCS group (n = 34) | χ2 value/t value/z value | P value | |
|---|---|---|---|---|
| Follow-up period (month) | 21.7 ± 4.66 | 24.8 ± 5.78 | − 2.710 | 0.009 |
| Garden’s alignment index | ||||
| Anteroposterior (degree) | 169.71 ± 4.66 | 170.59 ± 4.69 | − 0.253 | 0.801 |
| Lateral (degree) | 171.87 ± 5.46 | 171.93 ± 5.62 | 1.262 | 0.211 |
| Harris Hip Score | ||||
| 6 weeks after surgery | 59.04 ± 4.13 | 58.32 ± 5.26 | 0.651 | 0.651 |
| 3 months after surgery | 78.81 ± 3.43 | 77.63 ± 3.34 | 1.462 | 0.148 |
| 6 months after surgery | 90.47 ± 5.79 | 89.87 ± 4.24 | 0.591 | 0.556 |
| 1 year after surgery | 92.63 ± 5.55 | 89.74 ± 5.33 | 1.709 | 0.092 |
| Femoral neck shortening | ||||
| In the vertical plane | ||||
| Mean decrease (mm) | 5.10 ± 1.90 | 11.14 ± 2.78 | − 11.13 | < 0.0001 |
| No/mild (0–4.9) | 24 (70.58%) | 12 (35.29%) | − 6.11※ | |
| Moderate (5–9.9) | 10 (29.41%) | 12 (35.29%) | < 0.0001 | |
| Severe (10 or greater) | 0 | 10 (29.41%) | ||
| In the horizontal plane | ||||
| Mean decrease (mm) | 5.11 ± 1.90 | 10.51 ± 2.78 | − 10.61 | 0.000 |
| No/mild (0–4.9) | 26 (76.47%) | 15 (44.12%) | ||
| Moderate (5–9.9) | 8 (23.53%) | 11 (32.35%) | − 5.74※ | < 0.0001 |
| Severe (10 or greater) | 0 | 8 (23.53%) | ||
| Nonunion (%) | 2 (5.88%) | 8 (23.53%) | 4.22 | 0.0399★ |
| Failure of fixation (%)# | 1 (2.94%) | 3 (8.82%) | 0.6135★ | |
| Overall complications (%)& | 3 (8.82%) | 11 (32.35%) | 5.757 | 0.0164★ |
※Rank sum test
★Fisher’s exact test
&Overall complications = nonunion + failure of fixation