Leptospirosis and Depression: A Nationwide Cohort Analysis

Area of Science:

• Infectious Diseases
• Psychiatry
• Epidemiology

Background:

• Leptospirosis is a bacterial infection with potential systemic effects.
• Mental health conditions like depression are a significant public health concern.
• The long-term psychological impact of infectious diseases requires further investigation.

Purpose of the Study:

• To determine if leptospirosis serves as a risk factor for subsequent depression.
• To quantify the association between leptospirosis and the incidence of depression.

Main Methods:

• A retrospective cohort study design was employed using the Taiwan National Health Insurance Research Database (2000-2010).
• Patients diagnosed with leptospirosis without prior depression were compared to a control group without leptospirosis or depression.
• Cox proportional hazards regression models analyzed depression risk, adjusting for sex, age, and comorbidities.

Main Results:

• The leptospirosis cohort exhibited a higher incidence rate of depression (2.87 per 1,000 person-years) compared to the nonleptospirosis cohort (1.93 per 1,000 person-years).
• Patients with leptospirosis had an adjusted hazard ratio (aHR) of 1.58 for developing depression.
• Increased depression risk was noted in females (aHR=2.08), younger patients (<49 years, aHR=3.19), and those without comorbidities (aHR=2.14).

Conclusions:

• Leptospirosis is associated with a significantly elevated risk of depression.
• Physicians should proactively assess and manage the mental health of individuals with a history of leptospirosis.