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Table 1 Sources of the migration variables and year the data was collected

From: Migration intensity has no effect on peak HIV prevalence: an ecological study

Variable Source of variable Years data collected
Internal migration   
 Internal migration rate Human Development Report, 2009 [28] 1990-2005
 Percent internal migrants World Development Report, 2009 [31] 1992-2006
 Percent recent internal migrants World Development Report, 2009 [31] 1992-2006
 Recent urban migration (Women) Voeten et al. [24] 1987-2005
 Recent urban migration (Men) Voeten et al. [24] 1987-2005
 Crude migration intensity (5 year) Bell et al. [33] 2008-2009
 Crude migration intensity (Lifetime) Bell et al. [33] 2008-2009
 Courgeau’s k index (5 year) Bell et al. [33] 2008-2009
 Courgeau’s k index (Lifetime) Bell et al. [33] 2008-2009
International migration   
 Average annual net migration rate United Nations Department of Economic and Social Affairs: World Population Prospects [34] 2000-2005
 Immigration rate (1960) Human Development Report, 2009 [28] 1960
 Immigration rate (2005) Human Development Report, 2009 [28] 2005
 Emigration rate Human Development Report, 2009 [28] 2000-2002
 International movement rate Human Development Report, 2009 [28] 2000-2002
Within South Africa   
 Spent ≥ 1 month living in different province National HIV Prevalence, HIV Incidence, Behaviour and Communication Survey I [35] 2002
 Born in different province National HIV Prevalence, HIV Incidence, Behaviour and Communication Survey I [35] 2002
 Spent ≥ 1 month away from home in the preceding year National HIV Prevalence, HIV Incidence, Behaviour and Communication Survey II [36] 2005