Table 1 Baseline data of with and without screw fixation
Variable | Group 1 (n = 21) | Group 2 (n = 23) | p value |
|---|---|---|---|
With screw | Without screw | ||
Gender (M/F) | 16/5 | 14/9 | 0.276 |
Age | 65.5 (range 32 to 78) | 70.7 (range 53 to 86) | 0.094 |
BMI | 23.7 (range 19.1 to 34) | 22.5 (range 17.8 to 27.8) | 0.193 |
The duration from the primary operation to the first stage (month) | 46.4 (range, 2-206) | 69.4 (range, 2.6-209.9) | 0.218 |
The duration from the first stage to the second stage (month) | 4.5 (range, 1.7-14.6) | 6.6 (range, 0.8-65) | 0.463 |
First stage to the last follow-up (year) | 5.9 (range 2.3 to 8.3) | 5.5 (range 0.9 to 11) | 0.535 |
Diagnosis before first-stage operation (all patients underwent THA) | |||
Femoral neck fracture | 18 | 15 | |
Osteonecrosis of femoral head | 3 | 8 |