Application of Web-based Respondent Driven Sampling to Foreign-Born Korean Americans Sunghee Lee, Ai Rene Ong, Chen Chen, Michael Elliott University of Michigan Health and Life Study of Koreans This study was funded by the National Science Foundation [grant number SES-1461470, PI: Lee].
24
Embed
Application of Web-based Respondent Driven Sampling to Foreign … Lee... · 2019-10-28 · Application of Web-based Respondent Driven Sampling to Foreign-Born Korean Americans Sunghee
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Application of Web-based Respondent
Driven Sampling to Foreign-Born
Korean Americans
Sunghee Lee, Ai Rene Ong, Chen Chen,
Michael ElliottUniversity of Michigan
Health and Life
Study of Koreans
This study was funded by the National Science Foundation [grant number SES-1461470, PI: Lee].
Respondent Driven Sampling (RDS)
• Proposed by Heckathorn (1997, 2002)
• Sampling based on▫ Chain-referral through social networks and
▫ Actual recruitment by participants using coupons
( Researchers have little control over and little
information about selection)
• Potentially useful locating rare groups
• Popular usage in public health ▫ ~$100 million research funds by NIH as of 2011
▫ Used for National HIV Behavioral Surveillance by CDC
2
RDS Visualization – 1
3
Hypothetical
Network Population
Nodes
Edges
RDS Visualization – 2
4
Seeds
(Ego)
Alters (Peers)
Coupons
Chains RecruitersRecruits
Degrees
Waves
Long chain: Memoryless
Markov process
Two Types of RDS Recruitment Chains
Type 1
2 Seeds Sample size=20
Type 2
2 Seeds Sample size=20
Note: Each dot represents a participant;
Shade of dots: Character similarities;
Arrow: Recruitment direction.
5
Web-RDS & Racial/Ethnic Minorities
•Why RDS?
▫ Racial/ethnic homophily
•Why Web?
▫ Lower constraints with language and geography
coverage
6
This Study
• Utilities of Web-RDS for recruiting immigrants
• Data quality
▫ Geographic coverage
▫ Estimates on a series of socio-demographic, health status and healthcare access
Benchmarks available
• Dynamics in recruitment
▫ Recruitment patterns
▫ Recruitment cooperation through coupon use and follow-up survey
7
Data Quality
8
Health & Life Study of Koreans (HLSK)
• Web RDS ▫ Foreign-born Korean Americans in Los Angeles County
(LA) and State of Michigan (MI)
▫ June 2016 – March 2018
▫ Recruitment coupons Up to 2 coupons issued/participant
Delivered to email, text or messaging app
▫ Incentive: $20 for the main survey; $5 per recruit;