Validity and reliability of trends in suicide statistics

Area of Science:

• Epidemiology
• Public Health
• Mortality Statistics

Background:

• Official suicide rates are questioned due to under-reporting and definitional variations.
• Inaccuracies in mortality data can affect epidemiological research reliability.
• Despite potential errors, suicide statistics are crucial for public health surveillance.

Purpose of the Study:

• To assess the reliability and heuristic value of official suicide statistics in epidemiological research.
• To investigate the extent and nature of under-reporting in suicide data.
• To compare suicide rates across different cultural, social, and demographic groups.

Main Methods:

• Analysis of official suicide statistics from various countries, including England and Wales, Scotland, and Ireland.
• Examination of coroner's inquest procedures and post-mortem investigations for suicide ascertainment.
• Review of studies investigating under-reporting through methods like clinical assessment of case records.

Main Results:

• Evidence suggests under-reporting of suicide is a significant issue, though errors are largely random.
• Official suicide statistics, despite inaccuracies, retain heuristic value for epidemiological comparisons.
• Adjusted rates in some studies, like Ireland, show considerable increases but remain low internationally.

Conclusions:

• Official suicide statistics are useful for epidemiological research due to random error patterns.
• Under-reporting is a key concern, but over-reporting is negligible.
• Comparisons of suicide rates between countries and demographic groups remain feasible and informative.