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Obstructive sleep apnea results from structural compromise of the upper airway and decreased muscle tone during sleep. Central sleep apnea is usually due to instability of the feedback mechanism of the body that controls respiration. While positional changes commonly affect the severity of obstructive sleep apnea, the effect of positional changes on the(More)
Polyneuropathy may result in pain, numbness, and weakness, which may in turn affect driving ability. Medications used to treat neuropathic pain may alter cognition, which may further affect driving. Although such impairments have engendered questions about the driving safety in this group of patients, the rate of motor vehicle accidents (MVAs) in patients(More)
BACKGROUND A reliable and valid questionnaire for screening restless legs syndrome (RLS) is essential for determining accurate estimates of disease frequency. In a 2002 NIH-sponsored workshop, experts suggested three mandatory questions for identifying RLS in epidemiologic studies. We evaluated the reliability and validity of this RLS-NIH questionnaire in a(More)
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