Hazard ratios of obstructive sleep apnea associated with the number of annual emergency room visits for patients with asthma.

Crude HR#, relative hazard ratio; † Model was adjusted for age, sex, and comorbidities of hypertension, diabetes, hyperlipidemia, COPD, CAD, stroke, rhinitis, chronic sinusitis, GERD and obesity; ***p<0.001 Hazard ratios of obstructive sleep apnea associated with the number of annual emergency room visits for patients with asthma.