Increased the risk of depression in patients with chronic rhinosinusitis without polyp: A longitudinal follow up study using a national sample cohort.

Previous studies have reported that chronic rhinosinusitis (CRS) is closely related to depression. The present study aims to elucidate the association between CRS without nasal polyp and depression using a national sample cohort. Using the national sample cohort from Korean Health Insurance Review and Assessment Service, we matched patients with CRS (n = 21,707) to control participants (n = 86,828), at a ratio of 1:4, according to age, sex, household income, region of residence. The stratified Cox proportional-hazards model was used to evaluate the hazard ratio (HR) between CRS and depression. A subgroup analysis was performed according to age group and gender. The HR for depression was significantly higher in patients with CRS than in control participants (adjusted HR = 1.41, 95% confidence interval = 1.33-1.48) after adjustment for age, sex, household income, region of residence, and medical history. The risk of depression was also elevated in the subgroup analysis, regardless of age or gender. In conclusion, CRS was significantly associated with the increased risk of depression.