Table 1.

Parental Socio-demographics and exposure to drugs of abuse during pregnancy

	Mother's hair positive for cocaine and/or BEG (N = 9)	Mother's hair negative for any drug of abuse (N = 365)
Parental Nationality
Mother's nationality
Spanish	9 (100.0%)	298 (81.7%)
Non-Spanish	0 0%)	67 (18.2%)
Father's nationality
Spanish	9 (100.0%)	298 (81.7%)
Non-Spanish	0 (0%)	67 (18.2%)
Maternal age (years), mean (S.D.)	28.6 (6.0)	30.3 (5.3)
Mother's Educational Level
Unfinished elementary school	4 (44.4%)	85 (23.2%)
Employed mother (yes/no)
No	2 (22.2%)	110 (30.1%)
Mother's socioeconomic status
Managerial, professional & skilled (non-manual)	3 (33.3%)	101 (28.0%)
Skilled (manual) and partly skilled	5 (55.6%)	224 (61.3%)
Unskilled	1 (11.1%)	40 (10.9%)
Single Mother
Yes	0 (0%)	12 (3.3%)
Father's Educational Level
Unfinished elementary school	4 (44.4%)	120 (33.2%)
Employed father (yes/no)
No	0 (0%)	25 (7.0%)
Father's socioeconomic status
Managerial, professional & skilled (non-manual)	1 (11.1%)	101 (28.0%)
Skilled (manual) and partly skilled	7 (77.8%)	244 (66.9%)
Unskilled	1(11.1%)	20 (5.1%)
Habitat
Rural (< 10.000 inhab.)	1 (11.1%)	56 (15.3%)
Semi-rural (10 - 100.000 inhab.)	5 (55.6%)	127 (34.7%)
Urban (> 100.000 inhab.)	3 (33.3%)	182 (50.0%)
Maternal drug use at the visit
Past substance misuse, yes	5 (55.6%)**	47 (12.8%)
Cocaine use, yes	4 (44.4%)**	15 (4.2%)
Tobacco smoking
Mother	7 (77.8%)*	60 (16.3%)
Number of daily cigarettes, mean (S.D.)	6.5 (2.1)	7.2 (6.0)
Did you smoke before pregnancy?, yes	8 (88.8%)*	100 (27.3%)
Father	7 (77.8%)*	138 (37.9%)
Have been exposed to tobacco smoke during pregnancy?	4 (44.4%)	101 (28.0%)
Other smokers in the presence of the pregnant woman?	2 (22.2%)*	23 (6.3%)
Use of Antidepressants, yes	(11.1%)*	8 (2.2%)
Alcohol use, yes	1 (0%)	15 (4.2%)

** P < 0.005 respect control group

* P < 0.05 respect control group