Fig. 1From: Characteristics of patients with depression initiating or switching antidepressant treatment: baseline analyses of the PERFORM cohort studyDistribution of PHQ-9 score categories at baseline, by treatment status. aThe between-group comparison of the categorical data was conducted using a chi-squared test. Abbreviations: AD antidepressant, PHQ-9, 9-item Patient Health QuestionnaireBack to article page