Table GPS-8. Lifetime prevalence of drug use among all adults (aged 15 to 64 years) in nationwide surveys among the general population. [see all tables in this series...]

Part (ii) Survey methods: last survey available for each Member State (from 2000 onwards)

Country		Geographical area	Year	Reference	Collection method	Original age range	Original sample size	Age range all adults	Sample size all adults	Age range young adults	Sample size young adults
Belgium		National	2004	(6)	Interview	All ages	12650	15–64		15–34
Bulgaria		National	2005	(1)	Interview	18–60	1036	18–60	1036	18–34	433
Czech Republic		National	2004	(2)	Interview	18–64	3526	18–64	3526	18–34	1414
Denmark		National	2005	(4)	Interview	16+	14566	16–64	13310	16–34	3583
Germany		National	2006	(7)	Mail	18–64	7912	18–64	7912	18–34	3306
Estonia		National	2003	(2)	Mail	15–69	1891	15–64			646
Ireland		National	2006–07	(5)	Interview	15–64	4967	15–64		15–34
Greece		National (except Aegean and Ionian Islands)	2004	(3)	Interview	12–64	4781	15–64	4351	15–34	2620
Spain		National	2005–06	(6)	Interview	15–64	27934	15–64	27934	15–34	14699
France		National	2005	(6)	Phone	12–75	30514	15–64	25879	15–34	10855
Italy		National	2005	(3)	Mail	15–64	27995	15–64	27995	15–34	16552
Cyprus		National	2006	(1)	Interview	15–64	3504	15–64	3504	15–34	1753
Latvia		National	2003	(1)	Interview	15–64	4534	15–64	4534	15–34
Lithuania		National	2004	(1)	Interview	15–64	4207	15–64	4207	15–34	1814
Hungary		National	2003	(2)	Interview	18–54	3675	18–54		18–34	2319
Malta		National	2001	(1)	Interview	18–64	2828	18–64	1755	18–34	640
Netherlands		National	2005	(3)	Interview	15–64	4516	15–64	4516	15–34
Austria		National	2004	(1)	Interview	14–100	4547	15–64	3980	15–34	1754
Poland		National	2006	(2)	Interview	15–64	2859	15–64	2859	15–34	2031
Portugal		National	2007	(2)	Interview	15–64	12202	15–64	12202	15–34	4765
Romania		National	2004	(1)	Interview	15–64		15–64		15–34
Slovakia		National	2006	(6)	Interview	15–64	1305	15–64	1305	15–34	556
Finland		National	2006	(7)	Mail	15–69	3029	15–64	2802	15–34	1387
Sweden		National	2006	(7)	Mail	16–84	56889	16–64	41701	16–34	14408
United Kingdom		England and Wales	2006–07	(10)	Interview	16–59	31054	16–59	31054	16–34	11973
United Kingdom		Northern Ireland	2005	(12)	Interview	16–59		16–59		16–34
United Kingdom		Scotland	2006	(15)	Interview	16+	3157	16–59	3157	16–34	1115
United Kingdom		United Kingdom	2004	(13)	Interview					16–34
Norway		National	2004	(2)	Interview	15+	3191	15–64	2669	15–34	1238

Notes:

 This table presents the methods and results for the last surveys available in each country. The number indicated in the column ‘Ref.’ is the reference to the corresponding survey in the table presenting all surveys available for each country Table GPS-0. 

 This table aims to present an overview of national surveys. Exceptionally, some relevant regional surveys are presented. Some city surveys reported by countries were not included as they tend to produce higher prevalence estimates which are not comparable with estimates for whole countries (or large regions with both urban and rural areas). Athens was included as a reference point for the 1993 survey. 

 ‘Data collection' means 'data collection method used in the survey': 'interview' (face-to-face interview, which may include self-completed sections for the more sensitive questions, also it may include CAPI — computer assisted interviews), 'phone' (telephone interview), 'mail' (mailed questionnaire), 'Multimethod' (Multi-Method — simultaneous use of interview, mail or internet in the same survey).  

  'Survey sample' refers to the number of actual respondents to the survey (Net sample). In some cases, national surveys cover originally a broader age range ('original age range') than that presented here for the standard groups 'All adults'(15–64) and 'Young adults' (15–34). Sample sizes are presented respectively for the 'original age range', the 'all adults' and 'young adults' groups.  

 In surveys with small sample sizes results should be interpreted with caution. 

 Countries were asked to report results using, as far as possible, EMCDDA standard age groups (all adults: 15–64, young adults: 15–34). In countries where age ranges are more restrictive, prevalence estimates may tend to be slightly higher. Some countries have recalculated their prevalence figures using the EMCDDA standard age groups. 

 For methods and definitions on population surveys in general, see General population surveys of drug use – methods and definitions.  

 See also 'General notes for interpreting data' on the Explanatory notes and help page. 

Sources:

 See Table GPS-0. 

 For more details on methodological features for each survey, see Table GPS-121. 

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