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Table 2 Hierarchical logistic regressions, non-operative vaginal deliveries

From: How did episiotomy rates change from 2007 to 2014? Population-based study in France

 

Episiotomy (2007–2014)

Episiotomy (2010–2014)

Episiotomy (2013–2014)c

aOR

95% CI

aOR

95% CI

aOR

95% CI

Maternal age (ref ≥ 40 years)

  < 20

0.89

[0.87–0.91]

0.89

[0.86–0.92]

0.85

[0.81–0.90]

 20–29

1.03

[1.01–1.05]

1.03

[0.99–1.04]

0.98

[0.94–1.02]

 30–39

1.09

[1.07–1.12]

1.07

[1.05–1.09]

1.04

[1.01–1.08]

Single pregnancy (ref = 0)

0.74

[0.72–0.76]

0.57

[0.55–0.59]

a

a

Breech vaginal delivery (ref = 0)

1.27

[1.23–1.30]

1.45

[1.41–1.48]

1.59

[1.49–1.67]

Epidural analgesia (ref = 0)

1.45

[1.43–1.47]

1.43

[1.43–1.45]

1.47

[1.45–1.52]

Non-reassuring fetal heart rate (ref = 0)

1.47

[1.47–1.49]

1.49

[1.47–1.52]

1.49

[1.47–1.54]

Status of health establishment (ref = Private)

1.33

[1.12–1.56]

1.30

[1.09–1.54]

1.37

[1.15–1.64]

Year of delivery (ref = 2014)

 2007

1.63

[1.61–1.64]

    

 2008

1.58

[1.56–1.60]

a

a

a

a

 2009

1.46

[1.44-1.48]

a

a

a

a

 2010

1.37

[1.36-1.39]

1.37

[1.35–1.38]

a

a

 2011

1.31

[1.29-1.32]

1.30

[1.29–1.32]

a

a

 2012

1.21

[1.20-1.23]

1.21

[1.20–1.23]

a

a

 2013

1.13

[1.12-1.15]

1.13

[1.12–1.15]

1.13

[1.11–1.14]

Parity (ref = multiparous women)

3.85

[3.84–4.00]

4.00

[4.00–4.17]

4.17

[4.17–4.35]

Gestational age (ref > 41 WA)

  < 37WA

b

b

0.42

[0.40-0.44]

0.42

[0.39–0.45]

 37-41WA

b

b

0.82

[0.79-0.85]

0.82

[0.77–0.87]

Newborn weight (ref < 4000 g)

b

b

b

b

1.54

[1.49-1.56]

  1. aOR: Adjusted Odds ratio, CI: Confidence Interval, WA: Weeks of Amenorrhea
  2. aNot studied
  3. bNot available in database
  4. cOnly single pregnancy