Trends in prevalence of substance use among Icelandic adolescents, 1995–2006

Table 1 Number of participants in the Youth in Iceland surveys, 1995–2006.

Year	N	% of population	% males
1995	3,814	86	51
1997	3,912	90	51
1998	3,723	89	52
1999	3,549	87	50
2000	3,220	82	49
2001	3,069	79	47
2002	3,226	78	50
2003	1,699	37	52
2004	3,805	85	52
2005	3,713	78	50
2006	3,670	82	50

Note. In 2003 the Icelandic survey became the local part of the international ESPAD study. This study used a questionnaire too large to implement in full size in class-room setting among 9^th and 10^th graders. The survey was divided into two parts (A and B), using separate questionnaires. Participants were randomly selected for these two groups. Both questionnaires included measures on substance use but only part A had items referring to illegal use such as hashish and amphetamines. The A part is utilized in this analysis.

ISSN: 1747-597X