Planned home compared with planned hospital births: mode of delivery and Perinatal mortality rates, an observational study

Table 2 Intervention (operative vaginal delivery and caesarean section) in women who are in primary care at the onset of labour

	TOTAL(n)	IV (N)	%	p	Model 1			p	Model 2			p
					Crude RR		95% CI		Adj OR		95% CI
Intended place of birth				**				**				**
Home	402,912	43,766	0,109		0,76	0,75	0,78		0,77	0,75	0,78
Hospital (REF)	219,105	30,135	0,138		1				1
Unknown	57,935	7042	0,122		0,87	0,84	0,89		0,86	0,84	0,89
Parity				**				**				**
Primiparous	302,489	70,334	0,233		10,49	10,27	10,71		11,90	11,64	12,16
Multiparous (REF)	377,463	10,609	0,028		1				1
Maternal Age				**				**				**
< 19 years	11,939	1295	0,108		0,86	0,81	0,91		0,40	0,37	0,42
20–25 years	74,101	8737	0,118		0,94	0,92	0,96		0,58	0,57	0,60
25–34 years (REF)	478,251	59,536	0,124		1				1
> 35 years	115,661	11,375	0,098		0,77	0,75	0,78		1,36	1,33	1,40
Ethnic background				**				**				**
Dutch (REF)	571,185	69,983	0,123		1				1
Non Dutch	108,767	10,960	0,101		0,80	0,79	0,82		0,96	0,94	0,99
Neighbourhood				**				**				**
Privileged neighbourhood (REF)	638,571	76,646	0,120		1				1
Underprivileged neighbourhood	41,381	4297	0,104		0,85	0,82	0,88		0,90	0,87	0,94
Gestational Age				**				**				**
< 34wk	4621	873	0,189		1,90	1,76	2,04		1,02	0,94	1,10
35-36wk	11,780	1926	0,163		1,48	1,41	1,55		0,96	0,91	1,01
37wk	27,303	2701	0,099		0,83	0,80	0,86		0,63	0,61	0,66
38-41wk (REF)	626,558	73,286	0,117		1				1
> 41 wk	9690	2157	0,223		2,16	2,06	2,27		2,11	2,00	2,22
Big3				**				**				**
SGA	50,681	5169	0,102		0,83	0,81	0,85		0,85	0,82	0,87
Prematurity	16,401	2799	0,350
Congenital abnomality	3594	904	0,252		1,86	1,76	1,97		1,77	1,67	1,88
Combination Big3	2443	507	0,140		2,64	2,44	2,85		1,66	1,49	1,85
No Big3	606,833	71,564	0,118		1				1
Time of delivery								**				**
Day 8.00–18.00 (REF)	288,052	38,414	0,133		1				1
Night 18.00–8.00	391,900	42,529	0,109		0,79	0,78	0,80		0,86	0,84	0,87
Day of delivery								**
Week day (REF)	494,662	58,785	0,119		1				nie
Weekend	185,290	22,158	0,120		1,01	0,99	1,02

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