Table 3

Caesarean section rates in each group of the Robson Ten Group Classification System by the study hospitals (n= 18 908)

Robson Ten Group Classification SystemAll hospitals
n (%)*
Hospital 1
n (%)*
Hospital 2
n (%)*
Hospital 3
n (%)*
P values†
1324/3564 (9.1)113/776 (14.6)62/745 (8.3)149/2043 (7.3)<0.001
2314/1366 (23.0)46/236 (19.5)51/185 (27.6)217/945 (23.0)0.148
3239/7036 (3.4)57/2035 (2.8)73/1861 (3.9)109/3140 (3.5)0.148
4236/2077 (11.4)23/342 (6.7)58/378 (15.3)155/1357 (11.4)0.001
51846/2510 (73.5)448/562 (79.7)283/377 (75.1)1115/1571 (71.0)<0.001
6206/216 (95.4)38/39 (97.4)23/24 (95.8)145/153 (94.8)0.774
7312/355 (87.9)69/78 (88.5)79/82 (96.3)164/195 (84.1)0.017
8501/732 (68.4)45/71 (63.4)132/180 (73.3)324/481 (67.4)0.213
98/8 (100)4/4 (100)2/2 (100)2/2 (100)NA‡
10351/1044 (33.6)41/140 (29.3)92/235 (39.1)218/669 (32.6)0.095
Total 4337/18 908 (22.9)884/4283 (20.6)855/4069 (21.0)2598/10 556 (24.6)
  • *n=number of caesarean sections in the group/total number of births within the group.

  • †P value from Pearson χ2 test comparing caesarean section rates by hospital in each group.

  • ‡Not applicable because the rate of caesarean section is a constant.