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. 2022 May 1;18(5):1297–1305. doi: 10.5664/jcsm.9846

Figure 3. Simple linear regression models of modified PHQ-9 score change as a predictor of PSQI score change.

Figure 3

(A) Pooled sample data. (B) Male patients. (C) Female patients. (D) Age > 50 years. (E) Age < 50 years. (F) Severe depression. (G) Mild to moderately severe depression. (H) More frequent sedative-hypnotic use. (I) Less frequent sedative-hypnotic use. (J) Criteria for depression response met. (K) Criteria for depression response not met. PHQ-9 = Patient Health Questionnaire-9, PSQI = Pittsburgh Sleep Quality Index.