The population of patients with chronic renal failure (CRF) has rapidly increased with the increasing prevalence of chronic kidney diseases worldwide. According to the international rankings for uraemia reported in the 2018 Annual Report of the United States Renal Data System (Saran et al., 2019), Taiwan has the highest rate of kidney dialysis worldwide. The 2018 Annual Report on Kidney Disease in Taiwan revealed that the prevalence of dialysis in Taiwan has increased in recent years. Nephrotic syndromes and nephropathy rank ninth among the 10 leading causes of death in Taiwan and contributed to death in 72.1% of adults aged 65 years or older. Thus, emphasis is warranted on the effects of these types of chronic health issues in everyday life (Ministry of Health & Welfare, 2019).Patients with CRF may experience discomfort symptoms such as anaemia, decreased urine output, oedema, increased blood pressure, acidosis and pruritus (Lin et al., 2013). These symptoms are related to the patients' renal function indices (i.e. blood urea nitrogen, serum creatinine and glomerular filtration rate [GFR]). Combs et al., (2015) indicated that pruritus was the most common discomfort symptom