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Table 2 Univariate and multivariate logistical models of predictors of severe perineal tears (SPT)

From: Epidural analgesia and its implications in the maternal health in a low parity comunity

Maternal characteristic   SPT Univariate analysis OR (95% IC) p value SPT Multivariate analysis OR (95% IC) p value
Epidural analgesia Yes 63/15758 (0.40) 1.05 (0.67–1.64) 0.826 63/15758 (0.40) 0.780 (0.48–1.26) 0.310
No 28/7360 (0.38) Ref.   28/7360 (0.38) Ref.  
Age Yes 32.85 ± 4.05   0.895 32.85 ± 4.05 0.824 (0.76–1.32) 0.721
No 31.86 ± 5.05 Ref.   31.86 ± 5.05   
Parity Parity 1 58/12242 (0.47) 1.37 (0.88–2.13) 0.152 58/12242 (0.47) 3.71 (1.14–12.00) 0.029
Parity 2 30/8681 (0.35) 2.95 (0.70–12.38) 0.131 30/8681 (0.35) Ref.  
3 or more 3/2260 (0.13) 4.05 (0.99–16.63) 0.051 3/2260 (0.13) Ref.  
Instrumental delivery Yes 35/3938 (0.89) 2.50 (1.63–3.82) < 0.001 35/3938 (0.89) 2.97 (1.79–4.92) < 0.001
No 56/19245 (0.29) Ref.   56/19245 (0.29) Ref.  
Episiotomy Yes 62/13155 (0.47) 1.63 (1.04–2.53) 0.023 62/13155 (0.47) 0.67 (0.40–1.13) 0.139
No 29/10028 (0.29) Ref.   29/10028 (0.29) Ref.  
New-born male Yes 39/12092 (0.32) 0.68 (0.45–1.04) 0.07 39/12092 (0.32) 0.65 (0.42–1.01) 0.056
No 52/11091 (0.47) Ref.   52/11091 (0.47) Ref.  
Weight > 4000 g, Yes 10/1070 (0.93) 2.57 (1.32–4.96) 0.005 10/1070 (0.93) 3.53 (1.81–6.90) < 0.001
No 81/22113 (0.37) Ref.   81/22113 (0.37) Ref.