Risk of pneumonia in patients with insomnia: A nationwide population-based retrospective cohort study
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Abstract
Evidence is lacking regarding whether insomnia increases the risk of infectious disease. Accordingly, the present study examined the risk of pneumonia in patients with insomnia. This study was a population-based retrospective cohort study on a cohort of 8061 patients with insomnia and a control cohort of 16,112 patients (matched by age, sex, and year of diagnosis) from the Taiwan National Health Insurance Research Database for the 2000-2010 period. Overall incidence of pneumonia was 50.6 per 1000 person-years in the insomnia cohort, which was significantly higher than that in the control cohort (30.9 per 1000 person-years). Overall, the insomnia cohort exhibited a higher risk of pneumonia (HR=2.43; CI, 2.24-2.62). By age group, the risk of pneumonia was significantly higher in the insomnia cohort for those aged ≤40 years (HR=3.23, CI: 1.38-7.57), 41-65 years (HR=2.62, CI: 2.07-3.32), and >65years (CI: 2.21-2.61). Compared with the controls, the insomnia cohort exhibited a higher risk of pneumonia, particularly in young adults.
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