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Table 3 Univariate Analysis of preoperative risk factors for surgical site infection (SSI) in patients who underwent caesarean sections

From: Incidence and predictors of surgical site infections following caesarean sections at Bugando Medical Centre, Mwanza, Tanzania

  Surgical site infection (SSI)   
Predictive factors Yes n (%) No n (%) HR (95% CI) p - value
Age in years     
 >30 4 (4.4) 86 (95.60 1.0  
 ≤30 30 (11.8) 225 (88.2) 2.8 (1.0-7.9) 0.055
Parity     
 Multiparas 19 (8.7) 119 (91.3) 1.0  
 Nulliparous 15 (11.8) 112 (88.2) 1.3 (0.7-2.6) 0.393
BMI‡     
 None obese 30 (9.6) 282 (90.4) 1.0  
 Obese 4 (12.1) 29 (87.9) 1.3 (0.4-3.6) 0.647
HIV status     
 Negative 23 (10.6) 195 (89.5) 1.0  
 Positive 4 (18.2) 18 (81.8) 1.8 (0.6-5.1) 0.295
Hypertension     
 No 24 (8.3) 265 (91.7) 1.0  
 Yes 10 (17.9) 46 (82.1) 2.2 (1.1-4.7) 0.031
ASA score*     
 1 or 2 22 (7.8) 260 (92.2) 1.0  
 ≥3 12 (19.1) 51 (80.9) 2.7(1.3-5.5) 0.005
Hemoglobin level in g/dl     
 >11 24 (10.0) 217 (90.0) 1.0  
 <11 10 (10.4) 86 (89.6) 1.0 (0.5-2.1) 0.960
Duration of ROM† in hrs     
 ≤8 25 (8.3) 277 (91.7) 1.0  
 >8 9 (20.9) 34 (79.1) 2.7 (1.3-5.8) 0.011
Number of vaginal exams     
 ≤3 20 (7.1) 260 (92.9) 1.0  
 >4 14 (21.5) 51 (78.5) 3.3 (1.7-6.5) 0.001
Duration of labor in hrs     
 ≤12 20 (7.3) 256 (92.7) 1.0  
 >12 14 (20.3) 55 (79.7) 3.0 (1.5-6.0) 0.002
Preop length of stays in hrs     
 ≤12 17 (7.8) 200 (92.2) 1.0  
 >12 17 (13.3) 111 (86.7) 1.7 (0.9- 3.4) 0.116
  1. *ASA = American Society of Anesthesiologists †ROM = rupture of membranes.
  2. ‡ BMI = Body mass index in kg/M2.