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"Our findings support the notion that the increasing frequency of psychosocial risk factors experienced during adolescence may have effects on HIV risk behaviors decades later," said study author David Cordova. He's an assistant professor of social work at the university.
Cordova's team followed 850 residents of Flint, Mich., from age 14 until age 32. Most were black. The participants' behaviors, health and social conditions were assessed six times over 18 years.
One-quarter of those with more behavioral risk factors as teens were more likely to have unprotected sex with recent partners. In adulthood, they were also more likely to have sexual intercourse with someone they just met, the study found.
In addition, these participants more often used illegal drugs before sex, and were more likely to have had at least four sexual partners.
These factors put them at higher risk for HIV infection than those with lower rates of drug use, violence and mental distress in their teens, Cordova said in a university news release.
However, the study only found associations, and because of the group's racial imbalance, the researchers noted the findings may not apply to all teenagers.
The findings were published recently in the journal AIDS.
-- Robert Preidt
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SOURCE: University of Michigan, news release, December 2017
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