| Summary: | While there are known developmental consequences and correlates of intimate partner violence perpetration and victimization, research focused on bidirectional and multiple forms of partner violence among Latino emerging adults is needed. This longitudinal study identified latent classes of intimate partner violence perpetration and victimization patterns among emerging adult Latinos (<italic>N</italic> = 1060; 60.6% female). A second aim examined acculturation and cumulative substance use correlates in high school, as predictors of intimate partner violence perpetration and victimization classes in emerging adulthood. Average age of participants was 15.5 years in 10th grade and 22.7 years in emerging adulthood. We identified four distinct subgroups of intimate partner violence perpetration and victimization, with 22% of individuals identified in a violence perpetration and victimization subgroup. Cumulative heavy episodic drinking and marijuana use in high school predicted belonging to the psychological bidirectional intimate partner violence group rather than the group with no violence. Cumulative marijuana use in high school, predicted belonging to the sexual bidirectional partner violence group compared to the no violence group. Our study extends the literature across developmental periods among Latino youth. The findings have implications for early adolescent prevention strategies and promotion of healthy intimate relationships.
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