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Reproducibility of exercise tolerance in patients with end-stage renal disease

By Pelagia Koufaki, P F Naish and Tom Mercer


Objective: To determine the interday reproducibility of peak\ud and submaximal exercise tolerance of patients with end-stage\ud renal disease (ESRD).\ud Design: Repeated measures.\ud Setting: Day-patient rehabilitation center.\ud Participants: Twelve consecutively presenting, self-selected\ud patients with ESRD.\ud Interventions: All patients performed peak exercise tolerance\ud assessments on a cycle ergometer up to the point of\ud volitional fatigue, with a 1-week interval between the 2 tests.\ud Main Outcome Measures: Cardiopulmonary, hemodynamic,\ud and physical performance parameters were assessed at\ud peak exercise and at the lactate threshold. Standard error of\ud measurement, percentage coefficient of variation (CV%), intraclass\ud correlation coefficient (ICC), and limits of agreement\ud (LOA) were calculated to determine the reproducibility of all\ud variables.\ud Results: CV% (range, 5%–7%) and ICCs (range, .94 –.98)\ud for oxygen uptake and heart rate at peak exercise and lactate\ud threshold indicated highly acceptable levels of group mean\ud reproducibility. LOA analysis revealed satisfactory levels of\ud reproducibility for individual patients.\ud Conclusion: Taken together, these reproducibility data may\ud be applied to clinical work, requiring the quantification of\ud changes in the exercise tolerance of patients with ESRD after\ud short-term interventions (eg, exercise training, therapeutic use\ud of recombinant erythropoietin).\ud Key Words: Exercise tolerance; Kidney failure, chronic;\ud Rehabilitation; Reproducibility of results

Publisher: Elsevier
Year: 2001
OAI identifier: oai:eresearch.qmu.ac.uk:997
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