Table 1 Baseline characteristics of women giving birth in 2018 or 2020 (after exclusion criteria)

Total

2,865

2,846

Maternal age (years), mean (SD)

31.25 (5.54)

31.72 (5.66)

 < 0.001

Gestational age (weeks), mean (SD)

39.08 (1.31)

39.05 (1.30)

Primiparous

47.6%

45.4%

Multiparous (≥ 2)

52.4%

54.6%

Body mass index (kg/m²)

25.06

25.41

 < 0.007

Birth mode (%):

  Vaginal delivery

67.3%

61.9%

 > 0.001

  Caesarean section planned

11.6%

13.5%

 > 0.001

  Caesarean section unplanned

12.4%

14.2%

 > 0.001

  Instrumental vaginal delivery

8.7%

10.4%

 > 0.001