Extra-striatal D_2/3 receptor availability in youth at risk for addiction.

Including both a positive THC screen and past or current SUD as additional covariates in the analyses strengthened the main group effect [F(1,41) = 9.02, p = 0.005; partial η 2 = 0.18, generally considered a medium effect size]; the group × region interaction continued to be significant at the trend level ( p = 0.077), Greenhouse–Geisser corrected.

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