Table 3.
Complications and revision surgery
| Characteristics | MCS (n = 75) | MMSS (n = 26) | MSSS (n = 29) | NMS (n = 51) | χ2 | P |
|---|---|---|---|---|---|---|
| Screw penetration | 3 (4.00)* | 1 (3.85) | 2 (6.9) | 11 (21.57)* | 12.60 | 0.010 |
| Humeral head avascular necrosis | 3 (4.00) | 1 (3.85) | 1 (3.45) | 5 (9.80) | 2.50 | 0.608 |
| Subacromial impingement | 4 (5.33) | 1 (3.85) | 1 (3.45) | 4 (7.84) | 0.91 | 0.875 |
| Implant failures | 0 (0.00) | 0 (0.00) | 1 (3.45) | 1 (1.96) | 2.93 | 0.342 |
| Nonunion | 0 (0.00) | 0 (0.00) | 1 (3.45) | 1 (1.96) | 2.93 | 0.342 |
| Deep infection | 0 (0.00) | 1 (3.85) | 0 (0.00) | 0 (0.00) | 5.27 | 0.304 |
| Total number of complications | 8 (10.67)* | 4 (15.38) | 5 (17.24) | 20 (39.22)* | 16.05 | 0.001 |
| Revision surgery | 3 (4.00)* | 1 (3.85) | 2 (6.90) | 10 (19.61)* | 10.46 | 0.021 |
Data are presented as n (%). *Significant differences were found between MCS and NMS groups. MCS: Medial cortical support group; MMSS: Medial multiscrew support group; MSSS: Medial single screw support group; NMS: No medial support group.