a: Hazard rates of initiating inhalant use for females ages 8-17 by ethnicity and region. These functions show the probability that a respondent would initiate inhalant use at age j, given that he or she had not been intoxicated before age j.
b: Hazard rates of initiating inhalant use for males ages 8-17 by ethnicity and region
Notes: W=White; AI=American Indian; NP=Northern Plains; SW=Southwest; UGL=Upper Great Lakes. Non-signficant coefficients for SW, male*region, age*male, age*AI, and male*AI were not used to calculate the hazard rates in Figures 3a and 3b.