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. 2019 Jan 15;15(1):129–137. doi: 10.5664/jcsm.7586

Figure 2. Unadjusted mean depression, assessed by PHQ-9, over time by intervention groups.

Figure 2

Numbers per group at baseline, postintervention, and 3-month follow-up were as follows: CBT-I group, 35, 35, and 30; non-CBT-I group, 32, 32, and 30, respectively. CBT-I = cognitive behavioral therapy for insomnia, PHQ-9 = Patient Health Questionnaire.