Table 3 Univariate analyses of demographic, preoperative, and intraoperative characteristics of patients with and without surgical site infection in the cohort of 1173 patients
Variable | Total (n = 1173) | No SSI (n = 1081) (%) | SSI (n = 92) (%) | Odds Ratio (OR) | 95% CI of OR | P value |
|---|---|---|---|---|---|---|
Age (in years) | ||||||
10–25 | 310 | 298 (96) | 12 (4) | R | - | - |
> 25–40 | 468 | 430 (92) | 38 (8) | 2.19 | 1.12–4.26 | 0.021 |
> 40 | 395 | 353 (89) | 42 (11) | 2.95 | 1.52–5.71 | 0.001 |
Parity | ||||||
Primiparous | 157 | 155 (99) | 2 (1) | R | - | - |
Multiparous | 192 | 185 (96) | 7 (6) | 2.93 | 0.60–14.3 | 0.184 |
Grand-multiparous | 28 | 27 (96) | 1 (6) | 2.87 | 0.25–32.7 | 0.396 |
Non pregnant | 796 | 714 (90) | 82 (10) | 8.90 | 2.16–36.58 | 0.002 |
Number of vaginal examinations 48 h. before surgery | ||||||
None | 890 | 872 (98) | 18 (2) | R | - | - |
1–9 | 187 | 115 (83) | 32 (17) | 10.00 | 5.47–18.26 | <0.005 |
> 10 | 96 | 54 (56) | 42 (44) | 37.67 | 20.33–69.81 | <0.005 |
Vaginal discharge | ||||||
Absent | 1084 | 1022 (94) | 62 (6) | R | ||
Present | 89 | 59 (66) | 30 (31) | 5.46 | 3.35–8.88 | <0.005 |
Variable | All (N = 1173) | No SSI (n = 1081) (%) | SSI (n = 92) (%) | Odds Ratio (OR) | 95% CI of OR | P value |
Blood glucose levels | ||||||
Normal | 677 | 628 (93) | 49 (7) | R | - | |
High | 92 | 57 (62) | 35 (38) | 7.86 | 4.7–13.12 | <0.005 |
Medical illness# | ||||||
Absent | 947 | 917 (97) | 30 (3) | R | - | |
Present | 226 | 164 (73) | 62 (27) | 11.55 | 7.24–18.42 | <0.005 |
ASA class | ||||||
Class 1 or 2 | 1111 | 1052 (95) | 59 (5) | R | - | |
Class 3–5 | 62 | 29 (47) | 33 (53) | 20.28 | 11.54–35.64 | <0.005 |
Emergency surgery | ||||||
No | 882 | 830 (94) | 52 (6) | R | - | |
Yes | 291 | 251 (86) | 40 (14) | 2.54 | 1.64–3.93 | <0.005 |
Type of anesthesia | ||||||
Local or spinal | 889 | 839 (94) | 50 (6) | R | - | |
General anesthesia | 284 | 284 (85) | 42 (15) | 2.91 | 1.88–4.49 | <0.005 |
Concurrent surgical procedure | ||||||
No | 1067 | 1005 (94) | 62 (6) | R | - | |
Yes | 106 | 76 (72) | 30 (28) | 6.39 | 3.90–10.48 | >0.005 |
Duration of surgery (hr.) | ||||||
Less than 1 | 262 | 250 (95) | 12 (5) | R | - | - |
1–4 | 852 | 787 (92) | 65 (8) | 1.72 | 0.91–3.23 | 0.92 |
More than 4 | 41 | 26 (63) | 15 (37) | 5.67 | 5.08–28.39 | <0.005 |
Antibiotic prophylaxis | ||||||
Within 1 h | 524* | 512 (98) | 12 (2) | R | - | |
After 1 h | 640* | 562 (88) | 78 (12) | 5.92 | 3.18–11.00 | <0.005 |
Blood transfusion | ||||||
No | 1033 | 969 (94) | 64 (6) | R | - | |
Yes | 140 | 112 (73) | 28 (20) | 3.78 | 2.32–6.14 | <0.005 |
Duration of post-op stay | ||||||
1–7 days | 663 | 634 (96) | 29 (4) | R | - | - |
> 7–14 days | 424 | 383 (90) | 41 (10) | 2.34 | 1.43–3.82 | 0.001 |
> 14 days | 86 | 64 (74) | 22 (26) | 7.51 | 4.07–13.84 | <0.005 |