Table 3 Pregnancy vulnerability distribution (N = 3,686): Marker alone and grouped in six dimensions.

	n	% [95% CI]
Maternal age <20 years or ≥35 years	766	20.8 [19.5–22.1]
Maternal smoking during pregnancy	694	18.8 [17.6–20.1]
Pre-pregnancy body mass index <18.5 or ≥30	806	21.9 [20.5–23.2]
Medico-obstetrical markers
Uterine scare or abnormality of the female reproductive tract	209	5.7 [4.9–6.5]
Previous preterm birth	52	1.4 [1.1–1.8]
Hypertension^a	172	4.7 [4.0–5.4]
Diabetes^b	217	5.9 [5.1–6.7]
Infection of genitourinary tract in pregnancy	636	17.3 [16.0–18.5]
Assisted reproductive technology use	73	2.0 [1.6–2.5]
At least one vulnerability marker of this dimension	1163	31.6 [30.1–33.1]
Socio-economic markers
Mother living alone	337	9.1 [8.2–10.1]
Maternal unemployment during pregnancy^c	221	6.0 [5.3–6.8]
At least one vulnerability marker of this dimension	524	14.2 [13.1–15.4]
Environmental and neighborhood markers
Neighborhood deprivation index: tenth decile	594	16.1 [14.9–17.3]
Noise >55 dB LAeq,night^d	775	21.0 [19.7–22.4]
NO2 ≥ 40 μg/m^3e	138	3.7 [3.2–4.4]
Lack of wooded area in the 100 meters around the residence building	520	14.1 [13.0–15.3]
At least one vulnerability marker of this dimension	1562	42.4 [40.8–44.0]

^aHistory of hypertension or hypertensive disease of pregnancy, excluding preeclampsia and eclampsia.
^bHistory of diabetes or gestational diabetes.
^cDoes not include housewives.
^dNoise average in front of residential building >55 dB LAeq,night (sound pressure level in dB, equivalent to the total sound energy over the night period 22h-6h).
^eAverage level of NO2 ≥ 40 μg/m3 during at least one month of pregnancy.

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