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Summary of univariate analysis results
*Patients with an ESS score greater than 9 were considered to have daytime sleepiness.
RLS: restless legs syndrome, ESS: Epworth sleep scale, BMI: body mass index, BUN: blood urea nitrogen, Hb: hemoglobin, TIBC: total iron-binding capacity, PTH: parathyroid hormone, ALT: alanine aminotransferase.
