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. 2021 Sep 18;21:634. doi: 10.1186/s12884-021-04054-3

Table 1.

Basic and obstetric charactersitcs of SSI and control groups

Variable SSI group
(n = 828)
Control group
(n = 1500)
P. V
(Sig.)
Crude Odds ratio (95% CI)
Age (mean ± SD) 31.20 ± 4.90 30.90 ± 4.80 0.15NS
  < 19

95% CI (30.9–31.5)

87 (10.50%)

95% CI (30.7–31.1)

141 (9.40%)

0.54NS 1.12 (0.84–1.49)
 20–34 678 (81.90%) 1231 (82.00%) 1.0
  ≥ 35 63 (7.60%) 128 (8.60%) 0.89 (0.65–1.23)
Residence
 Urban 361 (43.60%) 676 (45.10%) 0.50NS 1.0
 Rural 467 (56.40%) 824 (54.90%) 1.06 (0.89–1.26)
Parity
 1–4 716 (86.50%) 1372 (91.50%) ≤ 0.001 1.0
  >  4 112 (13.50%) 128 (8.50%) 1.68 (1.28–2.19)
Gestational age
  <  37 wks. 139 (16.80%) 172 (11.40%) ≤ 0.001 1.56 (1.22–1.98)
  ≥ 37 wks. 689 (83.20%) 1328 (88.60%) 1.0
Type of the CS
 Elective 156 (18.80%) 536 (35.70%) ≤ 0.001 1.0
 Emergency 672 (81.20%) 964 (64.30%) 2.40 (1.95–2.94)
Duration of CS
  ≤ 1 h 112 (13.50%) 421 (28.10%) ≤ 0.001 1.0
  >  1 h 716 (86.50%) 1079 (71.90%) 2.49 (1.98–3.14)
Bleeding (> 1000 ml)
No 739 (89.30%) 1433 (95.50%) ≤ 0.001 1.0
Yes 89 (10.70%) 67 (4.50%) 2.58 (1.85–3.58)
Labour Duration
  < 24 h 719 (86.80%) 1382 (92.10%) ≤ 0.001 1.0
  ≥ 24 h 109 (13.20%) 118 (7.90%) 1.78 (1.35–2.34)
Chorioamnionitis
 No 689 (83.20%) 1446 (96.40%) ≤ 0.001 1.0
 Yes 139 (16.80%) 54 (3.60%) 5.40 (3.89–7.49)
PROM
 No 467 (56.40%) 1297 (86.50%) ≤ 0.001 1.0
 Yes 361 (43.60%) 203 (13.50%) 4.93 (4.03–6.04)
ANC visits
 No 271 (32.70%) 296 (19.70%) ≤ 0.001 2.33 (1.86–2.91)
 1–4 319 (38.50%) 599 (39.90%) 0.003 1.35 (1.11–1.66)
  >  4 238 (28.80%) 605 (40.40%) 1.0
Obesity
 No 692 (83.60%) 1342 (89.50%) ≤ 0.001 1.0
 Yes 136 (16.40%) 158 (10.50%) 1.67 (1.30–2.14)
Diabetes Mellitus
 No 745 (90.00%) 1414 (94.30%) ≤ 0.001 1.0
 Yes 83 (10.00%) 86 (5.70%) 1.83 (1.34–2.51)
Hypertension
 No 787 (95.00%) 1455 (97.00%) 0.016 1.0
 Yes 41 (5.00%) 45 (3.00%) 1.68 (1.09–2.59)

NS Not significant P value

*Significant P value

**Highly significant P value