Table 2 Relative size of each group by Robson's classification according to pre and post intervention period
Groups | Relative size of groups % | |
|---|---|---|
Pre intervention | Post intervention | |
1. Nulliparous, single cephalic, ≥ 37 weeks, in spontaneous labour | 25.6 | 22.7 |
(170/664) | (143/628) | |
2. Nulliparous, single cephalic, ≥ 37 weeks, induced or CS before labour | 6.0 | 7.5 |
(40/664) | (47/628) | |
3. Multiparous (excluding prev. CS), single cephalic, ≥ 37 weeks, in spontaneous labour | 28.5 | 26.9 |
(189/664) | (169/628) | |
4. Multiparous (excluding prev. CS), single cephalic, ≥ 37 weeks, induced or CS before labour | 4.7 | 7.2 |
(31/664) | (45/628) | |
5. Previous CS, single cephalic, ≥ 37 weeks | 22.9 | 21.3 |
(152/664) | (134/628) | |
6. All nulliparous breeches | 1.3 | 1.3 |
(9/664) | (8/628) | |
7. All multiparous breeches (including prev. CS) | 2.0 | 1.9 |
(13/664) | (12/628) | |
8. All multiple pregnancies (including prev. CS) | 2.0 | 1.9 |
(13/664) | (12/628) | |
9. All abnormal lies (including prev. CS) | 0.5 | 0.6 |
(3/664) | (4/628) | |
10. All single cephalic, ≤ 36 weeks (including prev. CS) | 6.6 | 8.6 |
(44/664) | (54/628) | |