Using the Robson Classification to Explain the Fluctuations in Cesarean Section

Table 6

Robson’s 10-Group Classification of a selected group of Flemish women giving birth in 2008 and 2016: Cesarean section contribution per group (%).

	2008	2016	OR (95% CI)
1	3.31	2.53 (-0.78)	1.322 (1.03-1.70)
2a	2.94	2.05 (-0.89)	1.447 (1.10-1.90)
2b	2.08	1.15 (-0.93)	1.833 (1.30-2.61)
3	0.58	0.35 (-0.23)	1.671 (0.87-3.31)
4a	0.47	0.35 (-0.12)	1.371 (0.69-2.78)
4b	0.54	0.65 (+0.11)	0.825 (0.47-1.45)
5	6.42	5.81 (-0.61)	1.112 (0.94-1.32)
6	3.01	2.55 (-0.46)	1.184 (0.92-1.53)
7	1.56	1.69 (+0.13)	0.927 (0.67-1.29)
8	0.97	0.76 (-0.21)	1.282 (0.81-2.05)
9	0.19	0.22 (+0.03)	0.857 (0.31-2.35)
10	1.13	1.25 (+0.12)	0.902 (0.61-1.33)

Total absolute CS 23.20% 19.36%. Two-thirds of the decrease in CS rate between 2008 and 2016 is attributable to a drop in the absolute CS rate in Robson groups 1 and 2.