Addiction
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To examine rates and patterns of marijuana and other illicit drug use among different types of students and colleges in 1999, and changes in use since 1993. ⋯ Use of marijuana and other illicit drugs has increased on campuses across the United States in most student subgroups and all types of colleges. This may reflect earlier increases in middle schools and secondary schools among this cohort. However, nearly one-third of students initiated marijuana use in college and one of three began to use it regularly. Intervention efforts should be directed at college students, as well as secondary school students.