The change and its clinical significance of serum cystatin C in elderly patients with obstructive sleep apnea hypopnea syndrome

Objective To investigate the change of serum cystatin C (CC) level and its clinical significance in elderly patients with obstructive sleep apnea hypopnea syndrome (OSAHS) ,and to evaluate the diagnostic value of serum CC for renal impairment in elderly OSAHS patients.Methods Elderly snoring subjects (age≥60 years) un-