Table 2.
Comparison of operative and non-operative group
| Demographic data | Surgical treatment(n = 12) | No surgical treatment(n = 5) | p-value |
|---|---|---|---|
| Sex | |||
| Male/Female | 10(83.3%)/2(16.7%) | 4(80.0%)/1(20.0%) | 1.000 |
| Age | 42.4 ± 9.7 | 40.6 ± 8.6 | 0.722 |
| Smoking | 4(33.3%) | 1(20.0%) | 1.000 |
| Diabetes | 5(41.7%) | 1(20.0%) | 0.600 |
| Course of osteomyelitis | |||
| (> 3 months) | 11(91.7%) | 5(100.0%) | 1.000 |
| Previous operation time | 4.0 ± 1.5 | 3.8 ± 0.8 | 0.782 |
| Bone exposure | 11(91.7%) | 4(80.0%) | 0.515 |
| Preoperative Lab result | |||
| WBC and ESR/CRP | 7.5 ± 2.4and 4.3 ± 4.2/11.1 ± 3.1 | 8.0 ± 1.5and 25.5 ± 1.3/11.8 ± 1.8 | 0.657and 0.555/0.657 |
| Type of external fixator | |||
| Ring/Monolateral | 9(75.0%)/3(25.0%) | 4 (80.0%)/1(20.0%) | 0.538 |
| Size of bone defect | 6.2 ± 1.6 | 7.3 ± 2.3 | 0.268 |
| Average recurrent time (months) | 9.9 ± 2.8 | 13.0 ± 2.4 | 0.043 |
| Level of bone transport | |||
| Single/Double | 10(83.3%)/2(16.7%) | 3(60.0%)/2(40.0%) | 1.000 |
| Flap coverage | 1(8.3%) | 3(60.0%) | 0.053 |
| Intraoperative blood transfusion | 6(50.0%) | 3(60.0%) | 1.000 |
| Microbiological result | |||
| Pseudomonas aeruginosa | 9 (75.0%) | 0 (0%) | 0.009 |
| Staphylococcus aureus (include MRSA) | 3(25.0%) | 2(40.0%) | 0.600 |
WBC:white blood count; CRP:C-reactive protein; ESR:erythrocyte sedimentation rate; MRSA: methicillin-resistant Staphylococcus aureus