Study followed youth who received treatment for inhalant abuse. Many came from backgrounds marked by isolation, poverty, family violence, and substance abuse. Average age the youths first used inhalants was 9.72 years. Model predicted those who abused inhalants immediately before admission, were described as unmotivated in treatment, and were hospitalized during treatment were at greatest risk of relapsing during follow-up. (Contains 26 references and 5 tables.) (ADT)