Table 5.

Interpregnancy intervals by statistically significant study variables

	Yes		No
	n	%	N	%	p
	Late first visit to MHC
<6 months	10	9.52	95	90.48	<0.0001
6−12 months	30	16.85	148	83.15
>12 months	305	6.65	4,283	93.35
	Participation to first trim serum screening
<6 months	13	12.38	92	87.62	<0.0001
6−12 months	41	23.03	137	76.97
>12 months	1605	34.98	2,983	65.02
	Placenta sample taken
<6 months	2	1.90	103	98.10	0.0003
6−12 months	7	3.93	171	96.07
>12 months	41	0.89	4,547	99.11
	Blood glucose tolerance test performed
<6 months	24	22.86	81	77.14	<0.0001
6−12 months	51	28.65	127	71.35
>12 months	2,144	46.73	2,444	53.27
	Diagnoses O14.0
<6 months	5	4.76	100	95.24	0.0073
6−12 months	5	2.81	173	97.19
>12 months	64	1.39	4,524	98.61
	Diagnoses 014.0/1/9
<6 months	7	6.67	98	93.33	0.0067
6−12 months	8	4.49	170	95.51
>12 months	111	2.42	4,477	97.58
	Diagnoses O36.5
<6 months	2	1.90	103	98.10	0.0153
6−12 months	7	3.93	171	96.07
>12 months	61	1.33	4,527	98.67
	Number of check-ups at hospital			Number of all follow-up visits
	Mean (SD)	95 % CI	P	Mean (SD)	95 % CI	p
<6 months	3.7 (0.3)	3.2−4.3	0.0376	17.9 (0.1)	16.9−18.8	0.0294
6−12 months	3.5 (0.2)	3.1−3.9		16.8 (0.4)	16.1−17.5
>12 months	3.1 (0.0)	3.0−3.2		16.6 (0.1)	16.5−16.8

Diagnoses O14.0: Mild to moderate pre-eclampsia

O14.0/1/9: Mild to moderate pre-eclampsia/Severe pre-eclampsia/Unspecified pre-eclampsia

O36.5: Maternal growth for known or suspected poor fetal growth