| Primiparous women FMU/OU (n = 215)/(n = 215) | Multiparous women FMU/OU (n = 624)/(n = 624) | Effect ratio Primiparas/multiparas |
---|---|---|---|
OR (95% CI) | OR (95% CI) | OR (95% CI) | |
Primary outcomes | |||
 Uncomplicated birth | 2.2 (1.4–3.3) | 2.9 (2.0–4.2) | 0.7 (0.4–1.3) |
 Caesarean section | 0.4 (0.2–0.9) | 0.8 (0.3–2.2) | 0.6 (0.2–2.1) |
Secondary outcomes | |||
 Perinatal: | |||
  Apgar score <9/5 min | 0.6 (0.2–1.9) | 0.8 (0.4–1.9) | 0.8 (0.2–3.0) |
  NICU admission <24 h | 0.8 (0.4–1.9) | 0.7 (0.3–1.8) | 1.2 (0.3–4.3) |
  Infant readmission | 0.4 (0.1–1.4) | 0.7 (0.4–1.3) | 0.6 (0.2–2.2) |
 Maternal: | |||
  Intact perineum | 1.3 (0.9–1.9) | 1.3 (1.02–1.7) | 1.0 (0.6–1.6) |
  3rd-4th degree tear | 0.9 (0.4–2.0) | 0.6 (0.2–1.7) | 1.7 (0.4–6.4) |
  Maternal readmission | 0.3 (0.1–0.9) | 0.8 (0.4–1.4) | 0.4 (0.1–1.3) |
 Other: | |||
  Instrumental delivery | 0.4 (0.2–0.7) | 0.3 (0.1–0.9) | 1.5 (0.4–6.2) |
  Augmentation of labour | 0.4 (0.3–0.6) | 0.3 (0.2–0.5) | 1.3 (0.6–2.7) |
  Epidural analgesia | 0.4 (0.3–0.8) | 0.2 (0.1–0.4) | 2.5 (0.9–7.0) |
  Water birth | 2.4 (1.2–4.6) | 2.7 (1.9–3.8) | 0.9 (0.4–1.9) |
  Upright position for birth | 1.5 (0.8–3.1) | 1.9 (1.4–2.7) | 0.8 (0.4–1.7) |