Table 2.
Comparison of imputed visibility SS-PSE (successive sampling-population size estimation) posterior medians with other population size estimation methods for the 15 Armenia datasets.
| Population | Expert values (n) | Object multiplier | Service multiplier | WOCa (best mean) | SS-PSE median (no visibility) | SS-PSE median (visibility) | ||
|
|
Low | Median | High |
|
|
|
|
|
| FSWb, Yerevan 2012 | 1500 | 3143 | 9900 | N/Ac | N/A | N/A | 2041 | 3734 |
| FSW, Yerevan 2014 | 1500 | 3143 | 9900 | N/A | N/A | N/A | 469 | 445 |
| FSW, Yerevan 2016 | 1500 | 3143 | 9900 | 571 | 1283 | 1615 | No fitd | 2090 |
| FSW, Gyumri 2016 | 165 | 351 | 1089 | 150 | 92 | 196 | 277 | 171 |
| FSW, Vanadzor 2016 | 115 | 239 | 759 | 204 | 156 | 67 | 275 | 205 |
| MSMe, Yerevan 2012 | 2420 | 4202 | 6667 | N/A | N/A | N/A | No fit | 2407 |
| MSM, Yerevan 2014 | 2420 | 4202 | 6667 | N/A | N/A | N/A | No fit | 2299 |
| MSM, Yerevan 2016 | 2420 | 4202 | 6667 | 749 | 8300 | 11,900 | 1121 | 1550 |
| MSM, Gyumri 2016 | 176 | 306 | 485 | 3659 | N/A | 138 | 168 | 249 |
| MSM, Vanadzor 2016 | 123 | 214 | 339 | 150 | N/A | 40 | No fit | 666 |
| PWIDf, Yerevan 2012 | 1667 | 5842 | 14,473 | N/A | N/A | N/A | 1245 | 3236 |
| PWID, Yerevan 2014 | 1667 | 5842 | 14,473 | N/A | N/A | N/A | 1743 | 3435 |
| PWID, Yerevan 2016 | 1667 | 5842 | 14,473 | 9000 | N/A | 19,342 | 997 | 1245 |
| PWID, Gyumri 2016 | 167 | 584 | 1446 | 3000 | 6800 | 26 | No fit | 596 |
| PWID, Vanadzor 2016 | 117 | 409 | 1013 | 3000 | 7000 | 198 | No fit | 477 |
aWOC: wisdom of the crowd estimates.
bFSW: female sex workers.
cN/A: not applicable. Information was not collected at the time the study was implemented that would enable calculation of these values.
dSS-PSEs without visibility imputation where the value is No fit indicate that the model would not converge.
eMSM: men who have sex with men.
fPWID: people who inject drugs.