Background. Obstructive sleep apnea syndrome (OSAS) is associated with systemic inflammation and increased risk of\ncardiovascular and chronic kidney disease. Cystatin C (Cyst C) is a novel biomarker of both latent renal damage and cardiovascular\ndisease. Aim of the study was to measure serum levels of Cyst C, as well as IL-8 and CRP, in otherwise healthy OSAS patients.\nMethods. 84 individuals examined with polysomnography for OSAS symptoms without known comorbidities were prospectively\nrecruited. Results. According to apnea hypopnea index (AHI) subjects were divided in two groups: OSAS group (AHI > 5/hour,\n
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