Abstract: Objective To investigate the incidinence of constipation in the elderly patients undergoing hemodialysis(HD) or peritoneal dialysis(PD), and to explore its influencing factors. Methods From January to June 2021, 300 elderly patients who received HD or PD treatment in the Blood Purification Center of Zhongda Hospital of Southeast University were selected for questionnaire survey. The general information, Constipation Assessment Scale(CAS) scores, Patient-Assessment of Constipation Quality of Life(PAC-QOL)and the levels of laboratory indicators of the patients were collected. According to CAS score, the patients were divided into constipation group and non-constipation group, and binary Logistic regression was performed to analyze the risk factors of constipation. Results A total of 300 questionnaires were distributed, and 291 (97.0%)were effectively recovered. The incidence rate of constipation was 66.92% in HD patients, and 89.29% in PD patients. There were statistically significant differences in the total quality of life scores and the scores of physical discomfort, psychosocial discomfort, anxiety and satisfaction between the constipation group and the non-constipation group(P<0.05). There were significant differences in age and dialysis age between the constipation group and the non-constipation group in HD patients (P<0.05); And the age and blood phosphorus of PD patients showed significant difference between the constipation group and the non-constipation group(P<0.05). Logistic regression analysis showed that dialysis method(OR=2.28, 95%CI: 1.49-3.50, P<0.001), age(OR=1.71, 95%CI:1.21-2.43, P=0.003), dialysis age(OR=0.38, 95%CI: 0.15-0.98, P=0.046), diabetes(OR=3.23, 95%CI:1.88-5.57, P<0.001) were independent risk factors for constipation. Conclusions Dialysis method, age, dialysis age, and diabetes show effects on the incidence of constipation in the elderly patients.

Key words: aged, dialysis, constipation, influencing factors, quality of life