introduction: metabolic syndrome is a combination of cardiovascular risk factors of metabolic origin. we set out to: ？ determine the prevalence of metabolic syndrome in peritoneal dialysis and see how it evolved. ？ evaluate its influence on mortality. ？ review the nursing interventions aimed at preventing it. material and methods: a 5-year retrospective descriptive study was carried out. the metabolic syndrome diagnostic criteria classification proposed by ncep atp iii, modified by kam-tao li, was used. the other variables were obtained from the clinical history. results: the sample was made up of 53 patients with an average age of 62.02 years. the average time on dialysis was 28.02 months. the factors that describe metabolic syndrome in peritoneal dialysis were studied. they did not differ, except for glucaemia (p=0.012). the patients diagnosed with metabolic syndrome increased, without significance (p=0.18). the survival of patients with metabolic syndrome was lower, although without a significant difference (p=0.990). discussion: the role of nursing in the prevention and treatment of metabolic syndrome is fundamentally, as we can act on all the factors. the "knowledge deficit" should be assessed systematically in order to reinforce the intervention. we found the importance of establishing nursing diagnoses and re-assessing interventions designed to obtain the expected results. we have not managed to improve metabolic syndrome, which forces us to consider more effective actions, because ？ we have a high percentage of patients with metabolic syndrome, which increases every year. ？ they had lower survival, although the difference was not significant. ？ we should correct nursing diagnoses and interventions.