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Relationship between daily coffee intake and suicidal ideation.

Hwanjin Park1, Byung Seong Suh1, Kounseok Lee2

  • 1Department of Occupational & Environmental Medicine, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Republic of Korea.

Journal of Affective Disorders
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Summary

Caffeine intake and suicide risk were examined in a large cohort study. Moderate caffeine consumption, particularly in women, was associated with a reduced suicide risk, even when accounting for depression and sleep issues.

Keywords:
CaffeineCoffeeSuicide

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Area of Science:

  • Psychiatry and Behavioral Science
  • Epidemiology
  • Nutritional Neuroscience

Background:

  • Caffeine is the world's most consumed psychoactive substance.
  • Understanding the impact of caffeine on mental health, specifically suicide risk, is crucial.

Purpose of the Study:

  • To investigate the relationship between caffeine intake and suicide risk.
  • To analyze these associations separately for men and women.

Main Methods:

  • Analysis of data from the Kangbuk Samsung Cohort Study (KSCS) involving 80,173 individuals.
  • Utilized Chi-square tests, t-tests, and multivariate logistic regression.
  • Adjusted for age, depression, and sleep problems.

Main Results:

  • High daily coffee consumption (≥4 cups) was linked to increased suicide risk in both genders.
  • Moderate caffeine intake (1-4 cups) was associated with decreased suicide risk in women after adjustments.
  • No significant change in suicide risk was observed in men with moderate caffeine intake.

Conclusions:

  • Regular, moderate caffeine intake may reduce suicide risk and depression in women.
  • The findings suggest a potential protective effect of moderate caffeine consumption on mental well-being.