Mortality associated with depression: a forty-year perspective from the Stirling County Study

Area of Science:

• Epidemiology
• Psychiatry
• Public Health

Background:

• Investigates long-term mortality risks associated with depression.
• Examines confounding factors: alcoholism and cigarette smoking.
• Utilizes a general population sample assessed from 1952 to 1992.

Purpose of the Study:

• To assess the long-term mortality risks of depression.
• To explore the confounding roles of alcoholism and smoking.
• To identify temporal trends in comorbidity and mortality.

Main Methods:

• Longitudinal study of 1,079 adults with data from 1952, 1968, and 1992.
• Self-report and physician-report data collection.
• Cox regression models used to estimate mortality risk (Hazard Ratios).

Main Results:

• In 1952, depression significantly increased mortality risk only in men (HR 2.7).
• By 1968, depression was linked to mortality in both men (HR 2.2) and women (HR 2.1).
• Depression, alcoholism, and heavy smoking were independent mortality predictors in men, with varying onset times.

Conclusions:

• Initial low comorbidity meant depression's mortality risk in men wasn't amplified by alcohol or nicotine abuse in 1952.
• An association between depression and smoking emerged by the 1990s.
• Depression became a significant mortality risk for women over time, mirroring men's risk.