What is the role of lab tests in the workup of sleep-disordered breathing (SDB)?

Updated: Feb 13, 2020
  • Author: Vittorio Rinaldi, MD; Chief Editor: Zab Mosenifar, MD, FACP, FCCP  more...
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The relation between snoring, obstructive sleep apnea (OSA), and hypothyroidism has been confirmed by many authors. Thyroid-stimulating hormone (TSH) levels should be determined in patients who are newly diagnosed with sleep-disordered breathing (SDB) because SDB is relatively common among patients with hypothyroidism. Significant increases in homocysteine levels have been observed in OSA syndrome (OSAS) patients with cardiovascular disease.

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