Table 4.
Cox regression analysis for factors associated with reoperation.
| Variable | Reoperation |
P-value | CHR(95% CI) | P-value | AHR(95% CI) | ||
|---|---|---|---|---|---|---|---|
| Yes | No | ||||||
| SSI | Yes | 20(37.74) | 33(62.26) | <0.001 | 10 (4.5–21.7) | <0.001 | 7(3.16–15.72) |
| No | 09(4.55) | 189(95.45) | 1 | 1 | 1 | ||
| Age(years) | <60 | 24(82.8) | 190(85.6) | 1 | 1 | ||
| ≥60 | 5(17.2) | 32(14.4) | 0.695 | 1.2(0.46–3.2) | |||
| Incision site | Extremity | 19(65.5) | 84(37.8) | 0.007 | 2.87(1.3–6.2) | 0.023 | 2.5(1.14–5.42) |
| Abdominal | 10(34.5) | 138(62.2) | 1 | 1 | |||
| Duration of surgery(hours) | <2 | 21(72.4) | 166(74.8) | 1 | |||
| ≥2 | 8(27.6) | 56(25.2) | 0.734 | 1.15(0.51–2.6) | |||
| Urgency of surgery | Scheduled | 7(24.1) | 77(34.7) | ||||
| Emergent | 22(75.9) | 145(65.3) | 0.257 | 1.64(0.7–3.83) | |||
| Duration of AMP (hours) | ≤24 | 1(3.4) | 39(22.2) | 1 | 1 | ||
| >24 | 28(96.6) | 137(77.8) | 0.052 | 7.2(0.98–53.1) | 0.274 | 3.1(0.41–23.3) | |
| ASA score | <3 | 26(89.7) | 214(96.40) | 1 | |||
| ≥3 | 3(10.3) | 8(3.6) | 0.117 | 2.6(0.79–8.6) | 0.260 | 0.5(0.14–1.7) | |
| Comorbidity | Yes | 6(20.7) | 44(19.8) | 0.942 | 1.03(0.4–2.5) | ||
| No | 23(79.3) | 178(80.2) | 1 | ||||
| Gender | Male | 18(62.1) | 107(48.20) | 0.162 | 1.7(0.81–3.61) | 0.125 | 0.53(0.23–1.2) |
| Female | 11(37.9) | 115(51.8) | 1 | 1 | |||
| Type of wound | Clean or clean-contaminate | 17(58.6) | 197(88.7) | 1 | 1 | ||
| Contaminated | 12(41.4) | 25(11.3) | <0.001 | 4.7(2.23–9.80) | 0.739 | 1.2(0.49–2.73) | |
| Residence | Urban | 2(6.9) | 67(30.2) | 1 | |||
| Rural | 27(93.1) | 155(69.8) | 0.021 | 5.4(1.29–22.86) | 0.150 | 2.91(0.68–12.4) | |
| AMP use | Yes | 29(100) | 177(79.7) | ||||
| No | 0 | 45(20.3) | 0.103 | 0.04(0.001–2) | - | - | |
| Khat chewing | Yes | 7(24.1) | 63(28.4) | 0.579 | 0.8(0.34–1.84) | ||
| No | 22(75.9) | 159(71.6) | |||||
| Preoperative hospital stay (days) | <7 | 22(75.9) | 168(75.7) | ||||
| ≥7 | 7(24.1) | 54(24.3) | 0.988 | 1(0.43–2.40) | |||
| Postoperative WBC | Normal | 17(58.6) | 166(80.6) | 1 | 1 | ||
| Low | 1(3.4) | 6(2.9) | 0.712 | 1.5(0.2–11) | 0.474 | 0.46(0.05–3.9) | |
| High | 11(37.9) | 34(16.5) | 0.008 | 2.8(1.3–5.98) | 0.643 | 1.2(0.53–2.8) | |
NB-SSI-surgical-site-infection, WBC-white-blood-cell, AMP-antimicrobial-prophylaxis, ASA- American Society of Anaesthesiologists.