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. Author manuscript; available in PMC: 2019 Mar 1.
Published in final edited form as: J Adolesc Health. 2017 Dec 7;62(3):341–348. doi: 10.1016/j.jadohealth.2017.09.015

Table 3.

Adjusted Hazard Ratio (aHR) Estimates of Adolescents’ Crash Risk in a Multiple Cox Proportional Hazards Model (N=457)

Variable aHR (95% CI) p-value
TDP 0.796 (0.442, 1.433) 0.447
ODA 0.470 (0.241, 0.914) 0.026
Practice Quantity 1.022 (0.866, 1.208) 0.793
Practice Diversity 1.449 (1.022, 2.055) 0.038

Note: Parameter estimates are adjusted for all other terms in the model: Intervention assignment, ODA assignment, Practice Quantity, and Practice Diversity.