Table 1.

Socio-demographic variables

	Cases (n)	Controls (n)	Cases (Mean)	Controls (Mean)
Newborn’s gender
Male	113	111
Female	74	76
Mother’s age at pregnancy			29.6	30.1
Mean gestational age			38.9	39.3
Newborn weight			3387	3279
Apgar store (at 1 and 5 min)			>7/>8	>7/>8
Mother’s employment
No	112	117
Yes	75	70
Mother’s educational level
None	19	18
Primary school	62	60
Incomplete secondary	19	18
Complete secondary	40	39
Incomplete college	2	3
Complete college	45	49
Smoked during pregnancy?
No	91	95
Yes	93	89
Age when interviewed (year)
0.5–1	5	5
1–5	83	83
6–10	44	43
>10	55	56
Delivery type
Vaginal	137	138
Cesarian	44	40
Vacuum	3	5
Forceps	3	4
Net Income/month (€)
<800	15	16
800–1500	41	37
1500–2000	33	34
2000–2500	14	11
2500–3500	25	23
>3500	16	17

There were no significant differences in any of the variables.