The incidence of non-Hodgkin lymphoma is increased in patients with obstructive sleep apnea

Obstructive sleep apnea (OSA) is known to be associated with several cancers, but studies assessing the association between OSA and lymphoma have not been conducted yet. This study aimed to investigate the associations between OSA and non-Hodgkin lymphoma, which accounts for the majority of lymphoma, using the Korea National Health Insurance Service database. This retrospective cohort study analyzed the data from the Korea National Health Insurance Service database. A total of 198,574 patients aged >= 20 years who were newly diagnosed with OSA between 2007 and 2014 were included. The control group comprising 992,870 subjects was selected using propensity score matching by age and sex. The mean follow-up duration was 4.8 +/- 2.3 years. The primary endpoint was newly diagnosed non-Hodgkin lymphoma. The hazard ratio [95 % confidence interval] of OSA for the incidence of non-Hodgkin lymphoma was calculated based on Cox proportional hazard model. The incidence of non-Hodgkin lymphoma among patients with OSA was significantly higher than that among the controls (1.40 [1.16-1.69]). In particular, the incidence was higher in women than that in men (1.62 vs. 1.28). There was no difference in hazard ratio by age. In conclusion, OSA may be a risk factor for non-Hodgkin lymphoma.