Table 1.
Preoperative demographic and clinical data [Mean±SD].
| Variable | SM4+2 | SP4+2 | IM6+2 | IP6+2 |
|---|---|---|---|---|
| Patients (n) | 53 | 27 | 100 | 50 |
| Mean age (years) | 37.4±9.3 | 36.0±10.3 | 38.7±8.3 | 37.5±9.5 |
| Sex ratio (M/F) | 36/17 | 19/8 | 65/35 | 36/14 |
| AO fracture classification (A1/A2/A3) | 33/9/11 | 15/5/7 | 55/20/25 | 27/9/14 |
| Time interval from injury to operation (days) | 6.5±2.9 | 6.7±2.9 | 6.9±3.1 | 6.6±3.0 |
| Mean ISS | 13.7±7.1 | 12.7±6.5 | 13.8±7.1 | 13.6±7.2 |
| Follow-up (months) | 22.4±8.1 | 21.3±10.5 | 22.4±8.0 | 24.9±5.9 |
SM4+2/SP4+2: short-segment monoaxial/polyaxial pedicle screw fixation; IM6+2/IP6+2: intermediate monoaxial/polyaxial pedicle screw fixation; ISS: injury severity score.