Overall drug use in the study sample was very high on comparison
of the results in the general population according to EDADES
2009/2010 (Encuesta Domiciliaria sobre Alcohol y Drogas en España)
[26], a survey on alcohol and drugs in Spain. None of the environmental
factors studied led to an increased risk, except for an increase in
heroin use in the low socioeconomic group and an increase in cocaine
consumption in ADHD patients. Tobacco was reportedly consumed
regularly by 76.6% of the study subjects while in the EDADES survey
tobacco consumption was described in 28% of women and 35.9%
of men [26]. The most prevalent illegal drug reportedly used was
cannabis, as in the general population. In our study 86.7% of subjects
stated having used cannabis at least once in their life and 70% reported
use during the last year, while in the general population between 15 and
64 years of age, 32.1% had ever used cannabis and 10.6% had done so in
the last year [26]. In our study occasional consumption of cocaine was
of 46.7% while use during the last year was of 30%. These percentages
in the general population are lower, being 10.2% for occasional use and
2.6% for consumption in the last year [26]. According to the EDADES
survey, in the last year 7.1% of adults between 15 and 64 years of age
had consumed hypnosedatives, 0.8% ecstasy, 0.6% amphetamines, 0.5%
hallucinogens and 0.1% heroine [26], all of them lower percentages
than ours, except for hypnosedatives which was 6.7% in our sample.