Robson Group
Contribution of group to all births % (n) Cesarean birth rate in group % (n) *Absolute group contribution to overall CS rate % Relative group contribution to overall CS rate % Cesareans in each group performed without attempting vaginal birth % (n)
1 21.0 (6868) 17.4 (1194) 3.6 11.6 -
2a 12.0 (3917) 34.4 (1349) 4.1 13.1 -
2b 1.3 (416) 100 (416) 1.3 4.0 100 (416)
3 25.4 (8307) 2.5 (207) 0.6 2.0 -
4a 11.9 (3899) 6.6 (258) 0.9 2.5 -
4b 0.8 (258) 100 (258) 0.8 2.5 100 (258)
5 14.8 (4832) 81.5 (3937) 12.0 38.3 92.5 (3640)
6 2.1 (672) 96.4 (648) 2.0 6.3 90.0 (583)
7 1.9 (616) 95.6 (589) 1.8 5.7 89.3 (526)
8 1.7 (557) 71.5 (398) 1.2 3.9 89.4 (356)
9 0.4 (145) 92.4 (134) 0.4 1.3 73.1 (98)
10 6.3 (2079) 38.7 (805) 2.5 7.8 72.9 (587)
Not classifiable 0.5 (190) 51.1 (97) 0.3 0.9 89.7 (87)
Total 100 (32756) 31.4 (10290) 31.4 100 63.7 (6551)