Research Article
Using the Robson Classification to Explain the Fluctuations in Cesarean Section
Table 2
Patient, pregnancy, and delivery characteristics.
| | 1992 | 2000 | 2008 | 2016 |
| | Number of women | 67477 | 60987 | 68195 | 64323 | | Nulliparous women (%) | 45.9 | 46.2 | 46.9 | 45.1 | | Mean age (y) | 26.4 | 27.5 | 28.1 | 28.9 | | y (%) | 2.5 | 5.1 | 7.7 | 10.1 | | y (%) | 3.8 | 4.3 | 3.7 | 2.3 | | Multiparous women (%) | 54.1 | 53.8 | 53.1 | 54.9 | | Mean age (y) | 29.6 | 30.7 | 31.1 | 31.6 | | y (%) | 9.6 | 15.8 | 20.1 | 22.4 | | Artificial reproduction technology (ART) | | Ovulation induction | 1.4 | 1.7 | 2.1 | 2.6 | | IVF/ICSI (%) | 0.8 | 1.7 | 3.3 | 4.6 | | Multiple pregnancy (%) | 1.6 | 1.8 | 1.9 | 1.7 | | Preterm birth <37 w (%) | 5.6 | 7.1 | 7.4 | 7.6 | | Preterm birth <32 w (%) | 0.8 | 1.0 | 1.0 | 1.2 | | Epidural (%) | 34.8 | 61.7 | 67.4 | 70.3 | | Labor induction (%) Po | 27.8 | 30.4 | 25.9 | 25.6 | | Labor induction (%) Pn | 28.4 | 30.1 | 24.8 | 21.8 | | Cesarean section (%) | 11.8 | 16.4 | 19.5 | 20.9 | | Instrumental delivery (%) | 14.5 | 12.4 | 10.4 | 9.8 | | Number of births | 68613 | 62122 | 69466 | 65440 | | Birth weight | | <1500 g | 0.9 | 1.1 | 1.1 | 1.2 | | 1500-2499 g | 5.2 | 5.7 | 5.8 | 5.7 | | 2500-3999 g | 85.1 | 85.0 | 84.1 | 84.3 | | 4000-4499 g | 7.8 | 7.2 | 7.9 | 7.8 | | ≥4500 g | 1.0 | 0.9 | 1.1 | 1.0 | | Stillbirth (%) | 0.54 | 0.45 | 0,42 | 0,44 | | Early neonatal death (%) | 0.30 | 0.23 | 0.20 | 0.18 | | Infant death (%) | 0.66 | 0.46 | 0.39 | 0.37 |
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