Changes in suicide numbers in psychiatric hospitals: an analysis using log-linear time-trend models

Area of Science:

• Psychiatry
• Epidemiology
• Public Health

Background:

• Suicide rates among psychiatric inpatients are a critical indicator of mental healthcare quality.
• Understanding temporal trends in inpatient suicide is essential for evaluating treatment efficacy and patient safety.

Purpose of the Study:

• To investigate the hypothesis of an increasing trend in suicides among psychiatric inpatients.
• To analyze suicide rates in psychiatric facilities over a significant period, accounting for confounding factors.

Main Methods:

• Log-linear time-trend models were employed for statistical analysis of data from five psychiatric hospitals/departments in Baden-Württemberg, Germany (1970-1992).
• Models were adjusted for factors including patient admission numbers and general population suicide rates.
• Trends were analyzed separately for the periods 1970-1979 and 1980-1992.

Main Results:

• A general increase in inpatient suicides was rejected; instead, rates rose during 1970-1979 and subsequently decreased from 1980-1992.
• This trend persisted even after adjusting for admission numbers and a declining general population suicide rate.
• Diagnostic subgroups, including schizophrenia and depression, did not show significant deviations from the overall trend.

Conclusions:

• The study suggests a complex, non-linear trend in psychiatric inpatient suicides, with an initial rise followed by a decline.
• The findings may indicate a delayed positive impact of more humane treatment procedures introduced in the 1970s.
• Further research is warranted to confirm the long-term effects of evolving psychiatric care on patient safety.