DOI: 10.3886/icpsr37603.v4
title: Multilevel Influences on HIV and Substance Use in a YMSM Cohort (RADAR), Chicago Metropolitan Area, 2015-2020
title: Version 4

description: The National Institute on Drug Abuse (NIDA) funded RADAR in 2014 to collect multilevel,
longitudinal data and biospecimens from an ethnically and racially diverse
cohort of young, sexual and gender minorities (SGM; e.g., men who have sex with
men (MSM), transgender women, gender non-conforming individuals) who were
assigned male at birth (AMAB) (current core cohort n=1,113). The primary
objective of this study is to apply a multilevel perspective to a syndemic of
health issues associated with human immunodeficiency virus (HIV) in this
population. The multilevel design focuses on individual, dyadic (i.e., sexual
and romantic relationships), network (i.e., social, drug, and sexual
connections) and biologic factors that may be associated with HIV. The cohort
contains both HIV-negative and HIV-positive individuals, which allows for the
development of a repository of biospecimens and HIV sequence data from both
pre-infection and post-infection visits that will help facilitate future
projects evaluating substance use, HIV risk, and pathogenesis.
 A multiple cohort, accelerated longitudinal
design was utilized by initially enrolling two existing SGM cohorts and then
expanded through the use of convenience and snowball sampling methods.
Enrollment criteria varied slightly based on the recruitment method, but
overall inclusion criteria required participants to be AMAB, between 16 and 29
years of age, report having had sex with a man in the prior year or identify as
a SGM, live in the Chicago metropolitan area, and be an English speaker. Study
recruitment opened in February 2015. Participants
are followed through the developmental period of late adolescence to early
adulthood, which is a critical period of initiation and acceleration of sexual
behavior and substance use. Study visits occur every six months.
description: The primary objective of this study is to apply a multilevel perspective to a syndemic of health issues associated with human immunodeficiency virus (HIV) in this population.
description: A multiple cohort, accelerated longitudinal design was utilized by initially enrolling two existing SGM cohorts and then expanded through the use of convenience and snowball sampling methods. Enrollment criteria varied slightly based on the recruitment method, but overall inclusion criteria required participants to be AMAB, between 16 and 29 years of age, report having had sex with a man in the prior year or identify as a SGM, live in the Chicago metropolitan area, and be an English speaker. Study recruitment opened in February 2015. Participants are followed through the developmental period of late adolescence to early adulthood, which is a critical period of initiation and acceleration of sexual behavior and substance use. Study visits occur every six months.
description: A
multiple cohort, accelerated longitudinal design was utilized by initially
enrolling two existing cohorts of sexual and gender minorities and then expanded with an additional
recruitment group through the use of convenience and snowball sampling methods. Inclusion criteria required participants to be AMAB, between 16 and 29 years of age, report having had sex with a man in the prior year or identify as a SGM, live in the Chicago metropolitan area, and be an English speaker.
description: Datasets: 
DS0: Study-Level Files
DS1: Visit #1 Psychosocial Public Use Data
DS2: Visit #1 Psychosocial Restricted Use Data
DS3: Visit #1 Partner Survey Public Use Data
DS4: Visit #1 Partner Survey Restricted Use Data
DS5: Visit #1 Biomedical Restricted Use Data
DS6: Visit #2 Psychosocial Public Use Data
DS7: Visit #2 Psychosocial Restricted Use Data
DS8: Visit #2 Partner Survey Public Use Data
DS9: Visit #2 Partner Survey Restricted Use Data
DS10: Visit #2 Biomedical Restricted Use Data
DS11: Visit #3 Psychosocial Public Use Data
DS12: Visit #3 Psychosocial Restricted Use Data
DS13: Visit #3 Partner Survey Public Use Data
DS14: Visit #3 Partner Survey Restricted Use Data
DS15: Visit #3 Biomedical Restricted Use Data
DS16: Visit #4 Psychosocial Public Use Data
DS17: Visit #4 Psychosocial Restricted Use Data
DS18: Visit #4 Partner Survey Public Use Data
DS19: Visit #4 Partner Survey Restricted Use Data
DS20: Visit #4 Biomedical Restricted Use Data
DS21: Visit #5 Psychosocial Public Use Data
DS22: Visit #5 Psychosocial Restricted Use Data
DS23: Visit #5 Partner Survey Public Use Data
DS24: Visit #5 Partner Survey Restricted Use Data
DS25: Visit #5 Biomedical Restricted Use Data
DS26: Visit #6 Psychosocial Public Use Data
DS27: Visit #6 Psychosocial Restricted Use Data
DS28: Visit #6 Partner Survey Public Use Data
DS29: Visit #6 Partner Survey Restricted Use Data
DS30: Visit #6 Biomedical Restricted Use Data
DS31: Visit #7 Psychosocial Public Use Data
DS32: Visit #7 Psychosocial Restricted Use Data
DS33: Visit #7 Partner Survey Public Use Data
DS34: Visit #7 Partner Survey Restricted Use Data
DS35: Visit #7 Biomedical Restricted Use Data
DS36: Visit #8 Psychosocial Public Use Data
DS37: Visit #8 Psychosocial Restricted Use Data
DS38: Visit #8 Partner Survey Public Use Data
DS39: Visit #8 Partner Survey Restricted Use Data
DS40: Visit #8 Biomedical Restricted Use Data
DS41: Visit #9 Psychosocial Public Use Data
DS42: Visit #9 Psychosocial Restricted Use Data
DS43: Visit #9 Partner Survey Public Use Data
DS44: Visit #9 Partner Survey Restricted Use Data
DS45: Visit #9 Biomedical Restricted Use Data
DS46: Visit #10 Psychosocial Public Use Data
DS47: Visit #10 Psychosocial Restricted Use Data
DS48: Visit #10 Partner Survey Public Use Data
DS49: Visit #10 Partner Survey Restricted Use Data
DS50: Visit #10 Biomedical Restricted Use Data
description: Young sexual and gender minorities who were assigned male at birth and recruited from the Chicago metropolitan area between 2015-2020. Smallest Geographic Unit: Metropolitan area
description: computer-assisted personal interview (CAPI); computer-assisted self interview (CASI); web-based surveyFor additional information on this study, please visit the Multilevel Influences on HIV and Substance Use in a YMSM Cohort Study webpage.