Table 3.
Details of surgical data
| Variables | All patients (n = 364) |
Patients without SSI (n = 342) | Patients with SSI(n = 22) | p value |
|---|---|---|---|---|
| Preoperative stay (days), median | 6 | 6 | 5 | 0.184b |
| Preoperative stay (≥ 7 days), n(%) | 176(48.4) | 165(48.2) | 11(50.0) | 0.873c |
| Incision cleanliness | < 0.001c* | |||
| I, n(%) | 333(91.5) | 322(94.2) | 11(50.0) | |
| II, n(%) | 18(5.0) | 14(4.1) | 4(18.2) | |
| III, n(%) | 13(3.5) | 6(1.8) | 7(31.8) | |
| ASA | 0.133c | |||
| I-II, n(%) | 236(64.8) | 225(65.8) | 11(50.0) | |
| III-V, n(%) | 128(35.2) | 117(34.2) | 11(50.0) | |
| Anesthesia type | 0.497c | |||
| Local anesthesia, n(%) | 16(4.4) | 14(4.1) | 2(9.1) | |
| Combined spinal-epidural, n(%) | 155(42.6) | 147(43.0) | 8(36.4) | |
| General, n(%) | 193(53.0) | 181(52.9) | 12(54.5) | |
| Drainage use, n(%) | 190(52.2) | 174(50.9) | 16(72.7) | 0.047c* |
| Plate use(vs. without plate), n(%) | 282(77.5) | 263(76.9) | 19(86.4) | 0.303c |
| Intraoperative blood loss (ml), median | 400 | 400 | 550 | 0.151b |
|
Intraoperative blood loss ≥ 400 mL, n(%) |
174(47.8) | 161(47.1) | 13(59.1) | 0.274c |
| Surgical duration (minutes), median | 165 | 163 | 180 | 0.136b |
| Surgical duration | 0.312c | |||
| < 120 min, n(%) | 58(15.9) | 56(16.4) | 2(9.1) | |
| 120–180 min, n(%) | 191(52.5) | 181(52.9) | 10(45.5) | |
| > 180, n(%) | 115(31.6) | 105(30.7) | 10(45.5) | |
| Postoperative stay (days), median | 12 | 11 | 36 | < 0.001b* |
Abbreviation: SSI surgical site infection, ASA American Society of Anesthesiologists
b Mann-Whitney U test.
c Pearson Chi-Square test.
* indicates significant variable at p < 0.05.