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Table 4 Univariate and Multivariate logistical models of predictors of instrumental delivery

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

Maternal characteristic   Instrumental delivery Univariate analysis OR (95% IC) p value Instrumental delivery Multivariate analysis OR (95% IC) p value
Epidural analgesia Yes 3582/15821 (22.64) 4.50 (4.03–5.03) < 0.001 3582/15821 (22.64) 3.27 (2.93–4.61) < 0.001
No 370/7362 (5.03) Ref.   370/7362 (5.03) Ref.  
Age Yes 31.72 ± 4.14   0.798 31.72 ± 4.14   0.714
No 31.13 ± 3.86 Ref.   31.13 ± 3.86 Ref.  
Parity Parity 1 2988/12242 (24.40) 1.37 (0.88–2.13) 0.152 2988/12242 (24.40) 3.71 (1.14–12.00) < 0001
Parity 2 950/8681 (10.94) 2.95 (0.70–12.38) 0.131 950/8681 (10.94) Ref.  
3 or more 14/2260 (0.52) 4.05 (0.99–16.63) 0.051 14/2260 (0.52) Ref.  
Episiotomy Yes 3858/13155 (29.32) 51.59 (41.27–64.49) < 0.001 3858/13155 (29.32) 51.59 (41.27–64.49) 0.155
No 80/10026 Ref.   80/10026 Ref.  
New-born male Yes 2163/12092 (17.88) 1.22 (1.13–1.30) < 0.001 2163/12092 (17.88) 1.22 (1.13–1.30) 0.012
No 1775/11091 (16.00) Ref.   1775/11091 (16.00) Ref.  
Weight > 4000 g, Yes 157/1070 (14.67) 0.83 (0.70–0.99) 0.039 157/1070 (14.67) 0.83 (0.70–0.99) < 0.001
No 3781/22113 (17.09) Ref.   3781/22113 (17.09) Ref.