Categorical treatment outcomes. A, Outcomes for participants assigned to the brief behavioral treatment for insomnia (BBTI) and IC groups (χ2=13.8, P<.001). See the “Methods” section for definitions. B, Percentages of participants in each group who no longer met the Diagnostic and Statistical Manual of Mental Disorders(Fourth Edition, Text Revision)2 and/or International Classification of Sleep Disorders(Second Edition)1 criteria for insomnia after treatment (χ2=15.5, P<.001). See the “Methods” section for details.