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Temporal Stability of the Timeline Followback Interview for Alcohol and Drug Use with Psychiatric Outpatients

Kate B. Carey, Michael P. Carey, Stephen A. Maisto, James M. Henson

Objective: The purpose of this study was to evaluate the test-retest reliability of the Timeline Followback (TLFB) interview for assessing daily alcohol and drug use with adults living with a severe mental illness. Method: Participants were 132 psychiatric outpatients (64% men) with a confirmed schizophrenia-spectrum (52%) or major mood disorder (48%) and a lifetime history of substance use disorder. They completed a 90-day TLFB twice, separated by a mean of 5 days, and represented 55% of the participants who originally consented to be in the study. Results: Test-retest reliability coefficients ranged from 0.73 to 1.00 (rounded) for 30-day TLFB and from 0.77 to 1.00 (rounded) for the 90-day TLFB. Within-subject comparisons of means across the three 30-day windows revealed no significant differences, and no degradation of the magnitude of the reliability coefficients was observed with increasingly distant assessment periods. Conclusions: The TLFB is a reliable method of assessing alcohol and drug use in outpatients diagnosed with severe mental illness. (J. Stud. Alcohol 65: 774-781, 2004)