Table 3 The cesarean section rate and proportion in subgroup by Robson Ten-Group Classification System.
From: Dissecting the current caesarean section rate in Shanghai, China
Robson Classification | Characteristics | Percent of total births (%) | CS rate (%) | Proportion of total caesareans (%) |
|---|---|---|---|---|
NS (1) | Nulliparous, singleton, cephalic, ≥37 weeks’ gestation, in spontaneous labour | 30.7 | 6.9 | 5.1 |
NI (2a) | Nulliparous, singleton, cephalic, ≥37 weeks’ gestation, induced labour | 13.7 | 19.0 | 6.3 |
NC (2b) | Nulliparous, singleton, cephalic, ≥37 weeks’ gestation, caesarean section before labour | 15.5 | 100.0 | 37.4 |
MS (3) | Multiparous (excluding previous caesarean section), singleton, cephalic, ≥37 weeks’ gestation, in spontaneous labour | 12.4 | 2.2 | 0.7 |
MI (4a) | Multiparous without a previous uterine scar, with singleton, cephalic pregnancy, ≥37 weeks’ gestation, induced labour | 2.6 | 4.3 | 0.3 |
MC (4b) | Multiparous without a previous uterine scar, with singleton, cephalic pregnancy, ≥37 weeks’ gestation, caesarean section before labour | 1.4 | 100.0 | 3.3 |
PC (5) | Previous caesarean section, singleton, cephalic, ≥37 weeks’ gestation | 11.1 | 96.6 | 25.9 |
BR (6 + 7 + 9) | All nulliparous with a single breech, All multiparous with a single breech (including previous caesarean section), and All women with a single pregnancy in transverse or oblique lie (including those with previous caesarean section) | 4.5 | 94.1 | 10.1 |
TW (8) | All multiparous (including previous caesarean section), | 2.2 | 94.1 | 5.0 |
PT (10) | All singleton, cephalic, <37 weeks’ gestation pregnancies (including previous caesarean section) | 5.3 | 44.1 | 5.6 |
UK (99) | Unknown | 0.5 | 21.6 | 0.3 |
Total | 100.0 | 41.5 | 100.0 |
