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The Netherlands Drug Situation 2010 - Trimbos-instituut

The Netherlands Drug Situation 2010 - Trimbos-instituut

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Table 2.1.3Annual prevalence and numbers of people with a cannabis-related disorder(m/f). Between brackets: 95% Confidence Intervals. Survey period 2007-2009DisorderCannabis abuseMales(%)0.6(0.2 – 1.0)Females(%)0.2(0.0 – 0.4)Total(%)0.4(0.2 – 0.6)Total(Number)40,2000.40.1Cannabis dependence(0.1 – 0.8) (0.0 – 0.3)Source: Nemesis 2007-2009 (De Graaf et al., <strong>2010</strong>).0.3(0.1 – 0.5)29,300Local surveysIn 2008, general health surveys were held among the general population of 16 years andolder in the four big cities: Amsterdam, Utrecht, Rotterdam and the Hague (Van Veelenet al., 2009). A written questionnaire was completed by a total of 20,877 people (responserate 50%) and data were weighted for gender, age group, ethnicity and type ofarea (disadvantaged or not). Questions on cannabis use were restricted to age group 16-54 years. <strong>The</strong> results showed that last month prevalence of cannabis use was almosttwice as high in Amsterdam (10%) compared to the other cities (5% in Utrecht and theHague and 6% in Rotterdam) (corrected for differences in background characteristics). Inthe total sample, last month prevalence was 7%, with appreciably higher rates amongmen than women (11% against 4%). Cannabis use decreased with increasing age andwas higher among Dutch, Surinamese and Antillean residents compared to Turkish, Moroccanand other non-western immigrants, with highest levels found among 'other western'respondents. Cannabis use was also highest among people who cannot manage ontheir wage and were unmarried or divorced. A comparison of data from 2008 with thosefrom previous surveys held in the period 2003-2005 suggests that cannabis use remainedfairly stable in the past years, at least in these cities.In conclusion<strong>Drug</strong> use in the general population remained fairly stable between 1997 and 2005. Datafrom local studies as well as a comparison between two different (NPO and NEMESIS-2)suggest that no major changes in cannabis prevalence occurred between 2005 and 2008.2.2 <strong>Drug</strong> use in the school and youth populationsData on trends in drug use among pupils aged 12-18 years are available from the DutchNational School Surveys on Substance Use carried out every 3 or 4 years since 1988(Online Standard Table 02). <strong>The</strong> most recent survey was conducted in 2007. In 2008 asurvey was conducted as well among pupils of schools for special education. New data oncannabis use from the 2009 Health Behaviour in School-aged Children (HBSC) study willbe available in December <strong>2010</strong> (after the submission of this National report). <strong>The</strong>re aresome new research data on factors related to (initiation of) cannabis use, among othersfrom the TRAILS study (Tracking Adolescents Individual Lives' Survey), and cannabis useand school problems (secondary analysis HBSC 2005/2006).33

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