Table 3 Standard 10-group (Robson) classification table, 2004-2005 Global Survey in Latin America.
From: WHO Global Survey on Maternal and Perinatal Health in Latin America: classifying caesarean sections
Group (a) | Obstetric population (b) | Relative size of the group (n, % and range) (c) | CS rate (n, % and range) (d) | Absolute contribution to CS rate (% and range) (e) | Relative contribution to CS rate (% and range) (f) |
|---|---|---|---|---|---|
1 | Nulliparous with single cephalic pregnancy, ≥37 wks gestation in spontaneous labour | 26576 27.7 (23.1-32.2) | 6172 23.2 (13.9-37.2) | 6.4 (4.0-10.0) | 18.2 (13.5-24.8) |
2 | Nulliparous with single cephalic pregnancy, ≥37 wks gestation who either had labour induced or were delivered by CS before labour | 8376 8.7 (5.6-14.3) | 5142 61.4 (41.7-74.0) | 5.4 (2.8-8.4) | 15.2 (6.9-23.6) |
3 | Multiparous without a previous uterine scar, with single cephalic pregnancy, ≥37 wks gestation in spontaneous labour | 30909 32.3 (26.4-34.8) | 3044 9.9 (4.5-17.3) | 3.2 (1.5-6.0) | 9.0 (4.3-14.9) |
4 | Multiparous without a previous uterine scar, with single cephalic pregnancy, ≥37 wks gestation who either had labour induced or were delivered by CS before labour | 6704 7.0 (3.8-10.5) | 2822 42.1 (22.8-60.4) | 3.0 (1.5-5.3) | 8.3 (3.7-14.9) |
5 | All multiparous with at least one previous uterine scar, with single cephalic pregnancy, ≥37 wks gestation | 10890 11.4 (8.7-14.1) | 9042 83.0 (76.9-95.9) | 9.4 (7.9-12.0) | 26.7 (23.6-32.2) |
6 | All nulliparous women with a single breech pregnancy | 1409 1.5 (1.0-2.0) | 1258 89.3 (82.2-91.0) | 1.3 (0.9-1.8) | 3.7 (2.2-5.3) |
7 | All multiparous women with a single breech pregnancy including women with previous uterine scars | 1794 1.9 (1.5-2.7) | 1482 82.6 (77.8-88.1) | 1.6 (1.2-2.2) | 4.4 (3.7-6.2) |
8 | All women with multiple pregnancies including women with previous uterine scars | 954 1.0 (0.6-1.3) | 690 72.3 (63.6-82.0) | 0.7 (0.4-1.0) | 2.0 (1.0-3.0) |
9 | All women with a single pregnancy with a transverse or oblique lie, including women with previous uterine scars | 1419 1.5 (0.4-3.8) | 1335 94.1 (77.6-100.0) | 1.4 (0.3-3.6) | 3.9 (1.0-8.9) |
10 | All women with a single cephalic pregnancy ≥36 wks gestation, including women with previous scars | 6773 7.1 (4.7-9.2) | 2913 43.0 (32.8-50.5) | 3.0 (1.5-4.3) | 8.6 (4.2-11.4) |
Total | 95804 100 | 33900 35.4 | 35.4 | 100 |