As a platform for HIV and substance use-related research, mSTUDY features sub-studies that address scientific questions beyond the scope of our primary aims.  Below, please find a list of our approved and active concepts.  If you would like to propose a sub study, please contact for more information.

Name Title
Hilary Aralis Chaotic Lifestyle Factors and Achievement of Viral Suppression among HIV-Positive Men in Los Angeles
Stephan Baral Assessing the relationship between stigma and engagement in HIV prevention and treatment
Susie Cassels Associations between migration, sexual risk behavior, and HIV testing behavior, and HIV care among mSTUDY participants
Jesse Clark PAREDES: A Comprehensive Partner-Based Approach to HIV and STI Case-Detection for Latino MSM
Stephanie Clavijo Beginning of chronic health conditions in young MSM of color in Los Angeles
Ryan Cook BMI-SUB study: The Bodyweight, Microbiome, Inflammation, and SUBstance use study
Jennifer Fulcher Recent methamphetamine use is associated with increased rectal mucosal inflammatory cytokines, regardless of HIV-1 serostatus
Pamina Gorbach Behavior change following HIV diagnosis: findings from a Cohort of Los Angeles MSM
Pamina Gorbach Sexual Behavior Difference within Main Partnerships by Drug Use
Pamina Gorbach Predictors of transmission risk in HIV-positive mSTUDY participants
Pamina Gorbach Predictors of incarceration within the mSTUDY Cohort
Pamina Gorbach Associations Between Cannabis Use, Sexual Behavior, and STIs/HIV In a Cohort of Young MSM
Pamina Gorbach Self-report and biomarkers of drug use
Nina Harawa HIV intervention models for criminal justice involved Black MSM
Jennifer Hsia Cigarette and E-Cigarette Use Among MSM of Color in Los Angeles
Jennifer Hsia Syndemic trends in tobacco use, other substance use, risky sexual behaviors, and mental health among MSM based on HIV serostatus
Shehnaz Hussain Biomarkers and Bugs: Microbiome and cytokine biomarkers in meth using mSTUDY participants
Marjan Javanbakht Transactional Sex among Men Who Have Sex with Men: Differences by Substance Use and HIV Status
Hayoun Lee Defining HIV-1 infection specific cellular pathways using single-cell RNA sequencing
Michael Li Longitudinal associations between minority stress, sexual risk behaviors, and risk of STI infection in MSM
Emeka Okafor Associations of mood disorder diagnosis, marijuana and drug use and inflammatory cytokines
Emeka Okafor Correlates of preexposure prophylaxis (PrEP) use among men who have sex with men (MSM) in Los Angeles, California
Brendan Quinn Needs Assessment of HIV Prevention Efforts: Geospatial analysis of HIV risk behaviors among men of color who have sex with men (MCSM) in Los Angeles county
Brendan Quinn Health and syndemic factors among MSM of Color in Los Angeles
Brendan Quinn Alcohol use and HIV clinical health outcomes
Steve Shoptaw Methamphetamine dose response in mSTUDY cohort
Chelsea Shover Methamphetamine use trajectory and HIV treatment outcomes in young minority MSM
Sae Takada Social capital and stigma and risk factors in engagement in care
Janine Trevilliyan Impact of methamphetamine use and HIV infection on periodontal disease, metabolic disease and cardiovascular risk