Table 1.

Frequencies of risky driving and sexual risk behaviors for the overall sample and by trajectory class membership

	Overall	Trajectory Class 1: Dual Chronic	Trajectory Class 2: Increasing AOD/Persistent ASB	Trajectory Class 3: Persistent AOD/Adoles cent ASB	Trajectory Class 4: Decreasing Drugs/Persistent ASB	Trajectory Class 5: Relatively Resolved
Risky Driving Behaviors
Past-Year Any Reckless Driving	55.5%	76.0%	56.4%	46.1%	71.0%	35.9%
Past-Year Any Driven Under Influence	47.7%	72.0%	67.8%	46.7%	58.1%	26.5%
Past-Year Any DUI/Driving Offense	8.8%	18.4%	9.8%	10.5%	6.5%	4.8%
Sexual Risk Behaviors
Past-5-Year ≥ 6 Sexual Partners	49.4%	85.7%	56.0%	43.6%	50.8%	39.2%
Past-Year Any Unprotected Sex Under Influence	44.8%	65.2%	45.0%	52.8%	43.1%	30.2%
Lifetime Any STIs	17.6%	22.0%	13.8%	8.4%	6.5%	8.3%
Lifetime Any Injection Drug Use	10.4%	25.5%	17.1%	12.2%	29.4%	15.5%