Key Takeaways

From the Authors As published in the article
  1. The relationship between anhedonia and suicidality in treatment-resistant depression (TRD) is not well understood, particularly with respect to whether the chronicity of anhedonic symptoms confers additional suicide risk beyond state-dependent anhedonia.
  2. Clinicians treating patients with TRD should assess not only the presence but also the persistence of anhedonic symptoms. Patients reporting both historical and current anhedonia may be at significantly elevated risk for suicidal ideation and attempt, and this can be screened with 2 simple questions from the MINI.
Extended Takeaways
  1. In this specialty mood and anxiety sample, 97 of 160 participants met criteria for treatment-resistant depression, underscoring how commonly antidepressant nonresponse presents in referral populations with a history of major depressive episodes.
  2. Within the treatment-resistant depression cohort, suicidality was common even before stratifying by anhedonia status: the mean MINI Suicide Module score was 4.32 (SD, 7.67), 60 (65%) reported suicidal ideation in the month prior to assessment, and 16 (17%) reported a suicide attempt within the same timeframe.
  3. The clinically relevant comparison was not any anhedonia versus none, since 84 participants (91%) in the TRD cohort reported past anhedonia, but chronic anhedonia versus past-only or acute-only anhedonia; 53 participants (58%) indicated chronic anhedonia.
  4. Among patients with treatment-resistant depression, chronic anhedonia identified a subgroup with greater suicidal ideation burden: 34.6 (65%) participants with chronic anhedonia reported suicidal ideation, compared with 44% of those with past or acute anhedonia.
  5. The association with suicidal ideation reached statistical significance in the treatment-resistant depression group, with χ2(1, N =97)=3.86, P= .049, Φ =.205; these patients were 2.4-fold more likely to report suicidal ideation than those without chronic anhedonia.
  6. Chronic anhedonia was also linked to recent suicide attempts in treatment-resistant depression, with χ2(1, N=97)=4.43, P=.035, Φ =.220 and a 3.9-fold greater likelihood of attempt, suggesting this symptom history may help prioritize closer monitoring and follow-up.
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