[Subclinical depression: a clinically relevant condition?].

Area of Science:

• Psychiatry
• Mental Health Research
• Clinical Psychology

Context:

• Subclinical depression involves depressive symptoms without meeting full diagnostic criteria for a depressive disorder.
• Characterized by significant impacts on quality of life and potential economic consequences.
• Prevalence suggests substantial societal burden, comparable to major depressive disorder in economic impact.

Purpose:

• To elucidate the clinical relevance and consequences of subclinical depression.
• To review evidence on the efficacy of psychological interventions for subthreshold depression.
• To assess the risk of progression from subclinical to major depressive disorder.

Summary:

• Subthreshold depression negatively affects quality of life and incurs economic costs, though less severe than major depressive disorder.
• Despite lower individual impact, the high prevalence of minor depression leads to comparable total economic costs.
• Individuals with subthreshold depression face an elevated risk of developing major depression, influenced by diagnostic definitions.

Impact:

• Psychological treatments demonstrate effectiveness in managing subclinical depression (Cohen's d = 0.42).
• Interventions may serve as a preventative measure against the development of major depressive disorder (IRR = 0.70).
• Findings underscore the importance of addressing subclinical depression to mitigate individual suffering and societal costs.