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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.