Estimated Number of People who Inject Drugs in Ho Chi Minh City, Vietnam: Findings from a Two-survey Capture–Recapture Population Size Estimation Exercise

Authors

Nghia Van Khuu¹, Phuc Duy Nguyen¹, Giang Tong Le², Hoa Thi Yen Luong³, Van Thi Thu Tieu⁴, Hau Phuc Tran¹, Thuong Vu Nguyen¹, Meade Morgan⁵, Abu S. Abdul-Quader^{3, *,}

¹Department of HIV/AIDS, Pasteur Institute of Ho Chi Minh City, Ho Chi Minh City, Vietnam

²Program Development Office, United States Agency for International Development, Hanoi, Vietnam

³Division of Global HIV and TB Prevention, Centers for Disease Control and Prevention, Hanoi, Vietnam

⁴Department of HIV Prevention, Ho Chi Minh City Provincial AIDS Committee, Ho Chi Minh City, Vietnam

⁵Division of Global HIV and TB Prevention, Centers for Disease Control and Prevention, Atlanta, GA, USA

^*Corresponding author. Email: afa3@cdc.gov

DOI

10.2991/jegh.k.200615.001How to use a DOI?

Keywords

Population size estimation; people who inject drugs; respondent-driven sampling; Ho Chi Minh City; Vietnam

Abstract

Background: HIV/AIDS program managers in Ho Chi Minh City (HCMC), Vietnam have always relied on the police reports and the UNAIDS Estimation and Projection Package for population size estimation of People Who Inject Drugs (PWID).

Methods: We used Respondent-driven Sampling (RDS) to implement a two-source capture–recapture study to estimate the population size of PWID in HCMC in 2017. The study was implemented in seven out of 24 districts and included men and women ages 18 years and older who reported injecting illicit drugs in the last 90 days, and who had lived in the city for the past six months. Estimates of the PWID population size for each of the seven districts were calculated accounting for the RDS sampling design. These were then adjusted to account for the district sampling probabilities to give an estimate for HCMC. Chapman two-source capture–recapture estimates of population size, based on simple random sampling assumptions, were also calculated for comparison.

Results: The estimates resulted in a population size for HCMC of 19,155 [95% Confidence Interval (CI): 17,006–25,039] using the RDS approach and 17,947 (95% CI: 15,968–19,928), using the Chapman approach.

Conclusion: The two-survey capture–recapture exercise provided estimates of PWID in HCMC – based on Chapman estimator and RDS approach – are similar. For planning HIV prevention and care service needs among PWID in HCMC, both estimates may need to be taken into consideration together with size estimates from other sources.

Copyright

© 2020 The Authors. Published by Atlantis Press International B.V.

Open Access

This is an open access article distributed under the CC BY-NC 4.0 license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - JOUR
AU  - Nghia Van Khuu
AU  - Phuc Duy Nguyen
AU  - Giang Tong Le
AU  - Hoa Thi Yen Luong
AU  - Van Thi Thu Tieu
AU  - Hau Phuc Tran
AU  - Thuong Vu Nguyen
AU  - Meade Morgan
AU  - Abu S. Abdul-Quader
PY  - 2020
DA  - 2020/06/19
TI  - Estimated Number of People who Inject Drugs in Ho Chi Minh City, Vietnam: Findings from a Two-survey Capture–Recapture Population Size Estimation Exercise
JO  - Journal of Epidemiology and Global Health
SP  - 76
EP  - 82
VL  - 11
IS  - 1
SN  - 2210-6014
UR  - https://doi.org/10.2991/jegh.k.200615.001
DO  - 10.2991/jegh.k.200615.001
ID  - VanKhuu2020
ER  -