Sixty-nine percent identified as gay, 23% identified as bisexual and 8% identified as an “other” sexual orientation.
Thirty-eight percent of the participants were African American, 26% were Latino, 25% were white and 11% were Asian or Pacific Islander, Native American or a different race. The average age of participants upon entry into the study was 19 years old. The oldest participants are currently 26 years old. The investigators collect data on the young men every six to 18 months. A total of 117 were recruited in 2007, 450 were recruited in 2010 and 589 were recruited in 2015. Publishing their findings in The Archives of Sexual Behavior, researchers in the RADAR study are following three cohorts of MSM in Chicago who are at risk for HIV and were recruited when they were 16 to 20 years old.
An ongoing long-term study of men who have sex with men (MSM) in Chicago has found that their condom-use patterns evolve over time and that such patterns differ between age cohorts, aidsmap reports.