Table 3.
Population size estimates of people who inject drugs in Ho Chi Minh City, Vietnam
| Calculation details | Survey district | PWID totala | ||||||
|---|---|---|---|---|---|---|---|---|
| Binh Chanh | Nha Be | Quan 3 | Quan 6 | Tan Binh | Tan Phu | Thu Duc | ||
| Participants in survey round one | 175 | 175 | 188 | 178 | 175 | 175 | 175 | |
| Participants in survey round two | 187 | 142 | 206 | 187 | 188 | 179 | 151 | |
| Participants in both round one and two | 54 | 38 | 58 | 28 | 21 | 52 | 60 | |
| Chapman population size estimates | 601 (491–710) | 644 (494–795) | 662 (544–780) | 1159 (810–1509) | 1511 (968–2054) | 597 (485–709) | 438 (369–506) | 17,947 (15,968–19,928) |
| RDS percentage of round two participants also in round one (95% CI) | 28.1% (21.4–34.8) | 26.2% (19.5–33.0) | 30.8% (22.4–39.1) | 14.5% (8.6–20.3) | 9.7% (4.7–14.6) | 27.0% (19.3–34.8) | 40.0% (31.0–49.0) | |
| RDS population size estimate | 623 (503–819) | 667 (530–899) | 611 (481–838) | 1227 (879–2079) | 1813 (1198–3739) | 647 (503–907) | 437 (357–565) | 19,155 (17,006–25,039) |
a
Calculated as a weighted sum of the district estimates.