Table 2. Overall CS rate (%) 518/2545 - 20.3%.
| Robson 's10-group classification | No. of CS over total no. of women in each group | Relative size of group (%) |
CS rate in each group (%) |
Contribution made by each group to overall CS rate of 20.3% |
|---|---|---|---|---|
| Nulliparous, single cephalic, >37 wks in spontaneous labor | 96/737 | 28.9(737/2545) | 13(96/737) | 3.77(96/2545) |
| Nulliparous, single cephalic, >37 wks, induced or CS before labor | 47/58 | 2.2(58/2545) | 8.1(47/58) | 1.84(47/2545) |
| Multiparous (excluding previous CS), single cephalic, >37 wks in spontaneous labor | 33/1236 | 48.5(1236/2545) | 2.6(33/1236) | 1.29(33/2545) |
| Multiparous (excluding prev CS), single cephalic >37 wks, induced or CS before labour | 33/54 | 2.1(54/2545) | 61(33/54) | 1.29(33/2545) |
| Previos CS, single cephalic, >37 wks | 173/297 | 11.6(297/2545) | 58.2(173/297) | 6.79(173/2545) |
| All nulliparous breeches | 30/33 | 1.2(30/33) | 90.9(30/33) | 1.17(30/2545) |
| All multiparous breeches (including previous CS) | 37/41 | 1.6(33/2545) | 90.2(37/41) | 1.45(37/2545) |
| All multiple pregnancies (including previous CS) | 26/37 | 1.4(37/2545) | 70.2(26/37) | 1.02(26/2545) |
| All abnormal lies (including previous CS) | 5/5 | 1.1(5/2545) | 100(5/5) | 0.19(5/2545) |
| All single cephalic, <36 wks (including previous CS) | 38/47 | 1.8(47/2545) | 80.8(38/47) | 1.49(38/2545) |