1. Assessing Quality of Population Size Estimates of People Who Inject Drugs Scientific Development Workshop AIDS 2014, Melbourne, 22 July 2014 Riku Lehtovuori, United Nations Office on Drugs and Crime (UNODC) David Wilson, The World Bank Eliot Ross Albers, International Network of People Who Use Drugs (INPUD) Waimar Tun, Population Council

2. Workshop Objective To strengthen participants’ capacity to assess the quality of population size estimates of people who inject drugs (PWID) and take action for improving them

3. QUALITY OF POPULATION SIZE ESTIMATES OF PEOPLE WHO INJECT DRUGS: GLOBAL OVERVIEW RIKU LEHTOVUORI HIV/AIDS SECTION UNODC

4. GLOBAL PREVALENCE OF PEOPLE WHO INJECT DRUGS 12.7 MILLION (0.27%) World Drug Report 2014/ UNODC, WHO, UNAIDS, World Bank

5. GLOBAL PREVALENCE OF HIV AMONG PEOPLE WHO INJECT DRUGS: 1.7 MILLION (13.1%) World Drug Report 2014/ UNODC, WHO, UNAIDS, World Bank

6. Assessing global data set on PWID and HIV 1)By methodology of the estimates; 2)By year of the estimates

7. Pop Size of People Who Inject Drugs Global classification of country estimates GRADEMETHOD AIndirect prevalence estimation methods (capture-recapture, multiplier methods, etc) BGeneral population survey CTreatment and other national registers D1Experts’ judgment with known method of estimation (e.g. obtained through a rapid assessment); Delphi method or other consensus estimate; Official government estimate with no methodology reported D2*Estimate with methodology unknown * Data graded D2 excluded from the UN dataset World Drug Report 2014/ UNODC, WHO, UNAIDS, World Bank (based on Mathers et al, 2008)

8. Size estimates of people who inject drugs; By Methodology Grade (n=89 countries) World Drug Report 2014/ UNODC, WHO, UNAIDS, World Bank

9. Size estimates of people who inject drugs; By Methodology Grade (n=89 countries) World Drug Report 2014/ UNODC, WHO, UNAIDS, World Bank

10. Size estimates of people who inject drugs; By Year (n=89 countries) World Drug Report 2014/ UNODC, WHO, UNAIDS, World Bank

11. Size estimates of people who inject drugs; By Year + Method (n=89 countries) World Drug Report 2014/ UNODC, WHO, UNAIDS, World Bank

12. HIV among People Who Inject Drugs Global classification of country estimates GRADEMETHOD AMulti-site seroprevalence study with at least two sample types (e.g. treatment or outreach sample); Seroprevalence study from a single sample type BRegistration or notification of cases of HIV infection (e.g. from treatment services) CPrevalence study using self-reported HIV D1Official government estimate with no methodology reported; Modelling studies (e.g. mode of transmission models) D2*Estimate with methodology unknown * Data graded D2 excluded from the joint UN dataset World Drug Report 2014/ UNODC, WHO, UNAIDS, World Bank (based on Mathers et. al, 2008)

13. Estimates of HIV among PWID; By Methodology Grade (n=111 countries) World Drug Report 2014/ UNODC, WHO, UNAIDS, World Bank

14. Estimates of HIV among PWID; By Methodology Grade (n=111 countries) World Drug Report 2014/ UNODC, WHO, UNAIDS, World Bank

15. Estimates of HIV among PWID; By Year (n=111 countries) World Drug Report 2014/ UNODC, WHO, UNAIDS, World Bank

16. Estimates of HIV among PWID; By Year + Method (n=111 countries) World Drug Report 2014/ UNODC, WHO, UNAIDS, World Bank

17. Still, many countries 1)Currently have PWID estimates, which are critically outdated and/or 2)Currently have PWID estimates which are methodologically very weak or 3)Do not have PWID and/or PWID/HIV estimates at all

18. Thank you