Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2019 Mar 14;5(1):e11737. doi: 10.2196/11737

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

©Paul Douglas Wesson, Rajatashuvra Adhikary, Anna Jonas, Krysta Gerndt, Ali Mirzazadeh, Frieda Katuta, Andrew Maher, Karen Banda, Nicholus Mutenda, Willi McFarland, David Lowrance, Dimitri Prybylski, Sadhna Patel. Originally published in JMIR Public Health and Surveillance (http://publichealth.jmir.org), 14.03.2019.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work, first published in JMIR Public Health and Surveillance, is properly cited. The complete bibliographic information, a link to the original publication on http://publichealth.jmir.org, as well as this copyright and license information must be included.

PMC Copyright notice

Respondent-driven sampling adjusted reverse tracking method equation (complete and simplified). Correction factors are calculated from the simulated distributions, from which the 2.5 percentile and 97.5 percentile are used to calculate 95% simulation intervals. Key: Ŝ=the estimated population size; n=the number of venues visited on the second visit; Ni=the number of people observed at venue i on the second visit; Mi=the number of people observed at venue i on the first visit; M=the total number of people observed at all venues on the first visit; R*=the sum of the number of times that a mapped venue is reported from the venue inquiry questions; RDS=the RDS sample size; r=the proportion of the RDS sample that reports not going to any venues; p=the proportion of the RDS sample that report attending a mapped venue; s=the proportion of venue-attending RDS participants who attend two venues; t=the proportion of venue-attending RDS participants who attend three venues.