Researchers hypothesized that even modest travel times from the sleep clinic might act as a potential barrier to access to obstructive sleep apnea diagnosis, reports Annals of the American Thoracic Society.

After controlling for a number of confounders including gender, age, obesity and education, travel time remained a significant predictor of OSA severity (p =<.01). In the multivariate model each increase in ten minutes of travel time was associated with an AHI increase of 1.4 events per hour.

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