Depression and smoking amongst older general practice patients

Area of Science:

• Gerontology
• Epidemiology
• Public Health

Background:

• Cerebrovascular disease is linked to late-life depression.
• Smoking is a risk factor for cerebrovascular disease, potentially contributing to elderly depression.
• Investigating the smoking-depression link in individuals aged 60+.

Purpose of the Study:

• To examine the association between smoking status and depression in older adults.
• To determine if smoking cessation could mitigate depression in later life.

Main Methods:

• Cross-sectional survey of 1030 adults aged 60+ in Western Australia.
• Participants categorized by smoking status: never, ex-light, ex-heavy, and current smokers.
• Depressive symptoms measured using the Center for Epidemiologic Studies-Depression Scale (CES-D), with scores >= 22 indicating clinical depression.

Main Results:

• Mean CES-D scores increased with smoking intensity: never (10.5), ex-light (10.6), ex-heavy (12.5), current (13.1).
• Prevalence of clinical depression (CES-D >= 22) was higher in ex-heavy (13.8%) and current smokers (17.2%) compared to never (7.7%) and ex-light smokers (8.5%).
• Current or past heavy smoking showed an increased risk of depression (OR=1.58) after adjusting for covariates.

Conclusions:

• Past heavy and current smoking are associated with greater depression frequency and severity in older adults.
• Smoking cessation is crucial for reducing depression burden in later life.
• Intervention timing is key; cessation before irreversible psychobiological changes may enhance effectiveness.