https://www.selleckchem.com/products/sodium-succinate.html 9%) screened positive for BPD. Overall, ECT was associated with significant improvement of depressive symptoms (χ²₁ = 504.8, P < .0001). Despite differing from BPD- individuals on key baseline features, BPD+ individuals responded to ECT with similar improvement in overall depression severity (χ²₁ = 0.22, P = .64), suicidality (χ²₁ = 1.63, P = .20), and core emotional (χ²₁ = 0.63, P = .43), sleep (χ²₁ = 0.20, P = .65), and atypical (χ²₁ = 1.30, P = .25) symptoms after 15 treatments. Post hoc analysis indicated a slightly less robust overall response among the BPD+ group by the 15th treatment. Acute course ECT benefits depressed patients with or without comorbid BPD, although patients with BPD may exhibit less pronounced improvement over time. Acute course ECT benefits depressed patients with or without comorbid BPD, although patients with BPD may exhibit less pronounced improvement over time. To examine the role of chronobiological dysrhythmicity in suicidal ideation and behaviors and its relation with hopelessness. One hundred twenty-seven patients (77 females, mean age of 47.4 ± 12.5 years) with a major depressive episode and bipolar disorder (BD) type I or II (according to Structured Clinical Interview for DSM-5 assessment) were recruited in 2019 and assessed for depressive and manic symptoms (Beck Depression Inventory-II, Young Mania Rating Scale) and with the Biological Rhythms Interview of Assessment in Neuropsychiatry, Beck Hopelessness Scale, and Scale for Suicide Ideation. Univariate regression and mediation analyses were performed. Forty-one patients (32.3%) showed clinically significant suicidal ideation and were more frequently affected by BD type I (P = .029) with mixed features (P = .022). Compared to nonsuicidal individuals, they had significantly more depressive symptoms (P = .019), higher emotional component of hopelessness (P = .037), and higher dysrhythmicity of sleep (P = to passive and ac