title: Inadequacies of self-report data for exclusion criteria detection in marihuana research: an empirical case for multi-method direct examination screening.
abstract: Stringent exclusion criteria in drug abuse research are necessary to protect against methodological confounds compromising the interpretation of findings. However, reliance on self-report screening may fail to detect important exclusion variables. We compared three levels of exclusion criteria screening in a study of neurophysiological/neurocognitive sequelae of chronic marihuana use in normals. LEVEL 1 (self-report) consisted of telephone pre-screening. LEVEL 2 (also self-report) involved in-depth personal interviews. LEVEL 3 consisted of several direct examination assessments including a medical/psychiatric examination by a board certified psychiatrist, eight weeks of twice per week urine drug screens, an EEG exam and eight hours of neuropsychological testing. Results indicated that 39.0% of subjects passing self-report screening had significant exclusion criteria findings that were only detected through LEVEL 3 direct examination procedures. Of all subjects found to have exclusion criteria after being provisionally accepted following LEVEL 1 telephone pre-screening, 55.7% were detected only through more rigorous LEVEL 3 direct examination screening methods.
authors.affiliation: Psychiatry, Louisiana State University Medical Center, Shreveport, USA.
authors.forename: F A
authors.initials: FA
authors.lastname: Struve
authors.forename: J J
authors.initials: JJ
authors.lastname: Straumanis
authors.forename: J E
authors.initials: JE
authors.lastname: Manno
authors.forename: M J
authors.initials: MJ
authors.lastname: Fitzgerald
authors.forename: G
authors.initials: G
authors.lastname: Patrick
authors.forename: J
authors.initials: J
authors.lastname: Leavitt
mesh_terms: D000293:Adolescent; D000328:Adult; D001921:Brain / Q000502:physiology; D003362:Cost-Benefit Analysis; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology; D005260:Female; D006801:Humans; D008297:Male; D002189:Marijuana Abuse / Q000175:diagnosis / Q000191:economics / Q000453:epidemiology*; D012647:Self-Assessment; D015813:Substance Abuse Detection