Table 4.
Standardized differences of the stable matching parameters before and after matching
| BCR | ||||||
|---|---|---|---|---|---|---|
| Yes | No | Standardized differences | ||||
| n | % | n | % | Matched sample | Original sample | |
| Open—sublay* | 196 | 67.4 | 196 | 67.4 | 0.000 | 0.752 |
| Component separation* | 95 | 32.6 | 95 | 32.6 | 0.000 | 0.752 |
| Male* | 160 | 55.0 | 160 | 55.0 | 0.000 | 0.065 |
| ASA score I | 19 | 6.5 | 15 | 5.2 | 0.059 | 0.092 |
| ASA score II | 153 | 52.6 | 167 | 57.4 | 0.097 | 0.113 |
| ASA score III–IV | 119 | 40.9 | 109 | 37.5 | 0.070 | 0.166 |
| Medial | 262 | 90.0 | 261 | 89.7 | 0.011 | 0.126 |
| Lateral | 76 | 26.1 | 74 | 25.4 | 0.016 | 0.173 |
| Combined | 47 | 16.2 | 44 | 15.1 | 0.028 | 0.347 |
| Defect size W1 (< 4 cm) | 62 | 21.3 | 68 | 23.4 | 0.050 | 0.081 |
| Defect size W2 (> = 4–10 cm) | 134 | 46.0 | 123 | 42.3 | 0.076 | 0.190 |
| Defect size W3 (> = 10 cm) | 95 | 32.6 | 100 | 34.4 | 0.036 | 0.286 |
| Fixation* | 249 | 85.6 | 249 | 85.6 | 0.000 | 0.157 |
| Preoperative pain | 191 | 65.6 | 183 | 62.9 | 0.057 | 0.167 |
| Unknown preoperative pain | 28 | 9.6 | 32 | 11.0 | 0.045 | 0.043 |
| No preoperative pain | 72 | 24.7 | 76 | 26.1 | 0.032 | 0.206 |
| Recurrent operation* | 59 | 20.3 | 59 | 20.3 | 0.000 | 0.057 |