Sildenafil and suicide in Sweden

Area of Science:

• Epidemiology
• Public Health
• Mental Health Research

Background:

• Sexual intimacy is theorized to support mental health, but experimental evidence is limited.
• Ethical and practical constraints hinder direct testing of intimacy's mental health effects.
• Epidemiology offers a rigorous quasi-experimental approach to study population-level mental health.

Purpose of the Study:

• To investigate the impact of increased sildenafil accessibility on suicide incidence in Swedish men aged 50-59.
• To test the hypothesis that lower sildenafil prices and increased usage correlate with reduced suicide rates.
• To explore the link between sexual intimacy and population mental health using suicide as a distal indicator.

Main Methods:

• An intent-to-treat design using interrupted time-series analysis.
• Examined monthly suicide incidence among Swedish men aged 50-59 before and after July 2013.
• Compared 102 pre-price drop months with 18 post-price drop months.

Main Results:

• A significant decrease in suicide incidence was observed among men aged 50-59 following the price drop of sildenafil.
• Approximately 65 fewer suicides than expected occurred in the post-intervention period.
• Statistical analysis ruled out shared trends, seasonality, biased samples, and reverse causation.

Conclusions:

• The findings support the theory that sexual intimacy positively influences mental health.
• Reduced barriers to intimacy may be a viable public health strategy for mitigating self-destructive behaviors.
• Increased sildenafil accessibility appears to be a proxy for enhanced sexual intimacy, correlating with improved mental health outcomes in the studied population.