Table 2.

Methods used in behavioural surveillance: number of countries using as main method(s).

	General Population	Youth	MSM	IDU	SW	STI patients	PLWHA	Migrants
Representative designs
Sexuality module in general health surveys	6	14			2			2
Specific KABP survey	8	10
Comprehensive sexuality/reproductive health surveys	8	6						1
Addiction focused surveys	2	5
Surveys using respondent driven sampling for hard-to-reach populations			2	2	1
Non representative designs
Service based data collection				11	5	9	3	1
Internet surveys		1	14				2
Venue-based/community based surveys			12	8	4		3	5
Cohort studies							2

Mapping of HIV/STI behavioural surveillance in Europe, 2008.*

* More than one method may be used for surveillance in a population