Psychometric Properties and Concurrent Validity of the Crafft among Norwegian Adolescents. Ung@hordaland, a Population-Based Study Jens Christoffer Skogen, Tormod Bøe, Ann Kristin Knudsen, Mari Hysing January 2013 Cite DOI adolescence adolescence drug use screening validation drug use validation screening alcohol problems crafft alcohol problems drug use adolescence validation crafft screening Related Sleep and School Attendance in Adolescence: Results from a Large Population-Based Study.