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Christine Khosropour, MPH Rollins School of Public Health Emory University Atlanta, GA. Use of SMS to retain racial/ethnic minority MSM in an online HIV prevention study in the US. July 18, 2011 IAS 2011 Rome, Italy. Background. MSM and the Internet.
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Christine Khosropour, MPH Rollins School of Public Health Emory University Atlanta, GA Use of SMS to retain racial/ethnic minority MSM in an online HIV prevention study in the US July 18, 2011 IAS 2011 Rome, Italy
MSM and the Internet • Men who have sex with men (MSM) in the US are at increased risk for HIV infection • Internet has emerged as a venue for MSM to meet sex partners online • High-risk sexual behavior linked to meeting partners online
Online HIV Prevention • Interest in online HIV prevention interventions has increased • Difficulty with online research: • Retention in longitudinal studies • High attrition of black and Hispanic study participants Alternatives?
Mobile Phone Usage in US 2010 Pew Internet and American Life Project Survey: Smith A. Mobile Access 2010. Available from: http://www.pewinternet.org/Reports/2010/Mobile-Access-2010.aspx.
Study Design and Eligibility • Enrolled white, black, and Hispanic MSM in an online 12-month longitudinal study • > 18 years old • Had a male sex partner in past 12 months • Had an SMS-enabled mobile phone • Stratified randomization by race for bi-monthly follow-up • Online follow-up surveys • SMS follow-up surveys
Retention Strategies • Automated reminder system • 3 reminders sent via SMS or email • Choice of reminder modality • Online Group: Text message or Phone Call • SMS Group: Email or Phone Call • Personal outreach • Phone call to participant
Online FU Baseline Online Survey Month 12 Online Survey Black Bi-monthly FU SMS FU Bi-monthly FU Bi-monthly FU Bi-monthly FU Click-through banner ad Online FU Baseline Online Survey Month 12 Online Survey Screening Questions Consent White Bi-monthly FU SMS FU Online FU Baseline Online Survey Month 12 Online Survey Hispanic Bi-monthly FU SMS FU
Study Enrollment 710 Enrolled in 12-month study 344 SMS 366 Online • 229 White • 46 Black • 69 Hispanic 241 White 60 Black 65 Hispanic
Retention of Study Participants by Follow-Up Group 70% Survival Probability Online SMS P = .20 Month 2 Month 4 Month 6 Baseline Follow-Up Time Point
Retention of Study Participants by Race/Ethnicity White Hispanic Black Survival Probability P = .007 Baseline Month 2 Month 4 Month 6 Follow-Up Time Point
Retention of Study Participants by Follow-Up Group, Stratified by Race/Ethnicity Black SMS White Online Hispanic SMS Hispanic Online White SMS 70% Black Online Survival Probability White SMS Hispanic SMS Black SMS White Online Hispanic Online Black Online P = .87 P = .88 P = .03 Baseline Month 2 Month 4 Month 6 Follow-Up Time Point
Conclusion • 85% cumulative retention at Month 6 • High retention • Difference in retention by race/ethnicity • Frequent follow-up and personal outreach increases retention of participants Can assess outcomes Utilize multiple data collection mechanisms
Acknowledgments • Research participants • Patrick Sullivan, DVM, PhD • Sullivan Research Team • Cyclogram • Emory Center for AIDS Research (CFAR) • P30 AI050409 • NIH, National Center on Minority Health and Health Disparities • Grant # RC1MD004370