Use of the Robson classification to understand the increased risk of cesarean section in case of maternal obesity

Table 3 Cesarean delivery profiles of women with obesity using Robson classification

Group*	*N CS in group*	*Total N in group*	*Group Size (%) 1*	*Group CS rate (%)2*	*Absolute group contribution to overall CS rate (%) 3*	*Relative group contribution to overall CS rate (%) 4*
1	66	346	11.6***	19.1***	2.2	7.8***
2	99	240	8.0**	41.3***	3.3**	11.8***
2a (Induced)	83	224	7.5**	37.1***	2.8**	9.9**
2b (Prelabor CS)	16	16	0.5	100.00%	0.5	1.9
3	43	910	30.4**	4.7***	1.4***	5.1
4	52	351	11.7***	14.8***	1.7***	6.2***
4a (Induced)	41	340	11.4***	12.1***	1.4***	4.9***
4b (Prelabor CS)	11	11	0.4	100	0.4	1.3
5	342	659	22.0***	51.9***	11.4***	40.7***
5.a (1 CS)	154	468	15.6***	32.9***	5.1***	18.3***
5.b (> 1 CS)	188	191	6.4***	98.4	6.3	22.4
6	17	29	1.0***	58.6	0.6**	2.0***
7	92	136	4.5***	67.6**	3.1***	10.9*
8	44	104	3.5	42.3	1.5	5.2***
9	10	10	0.3	100	0.3	1.2
10	76	206	6.9**	36.9***	2.5***	9
*Total*	841	2991	100	28.1***	28.1	100

* See groups description in Table 2
1. % = n of women in the group / total N women delivered in the setting × 100
2. % = n of CS in the group / total N of women in the group × 100
3. % = n of CS in the group / total N of women delivered in the setting × 100
4. % = n of CS in the group / total N of CS in the setting × 100
Comparisons using Chi square test with the normal weight groups, * p < 0.05, ** p < 0.01, *** p < 0.001

ISSN: 1471-2393