11.07.2015 Views

Care and Maintenance to Reduce Vascular Access Complications

Care and Maintenance to Reduce Vascular Access Complications

Care and Maintenance to Reduce Vascular Access Complications

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<strong>Care</strong> <strong>and</strong> <strong>Maintenance</strong> <strong>to</strong> <strong>Reduce</strong> <strong>Vascular</strong> <strong>Access</strong> <strong>Complications</strong>Interpretation of EvidenceLevels of EvidenceIaIbEvidence obtained from meta-analysis or systematic review of r<strong>and</strong>omized controlled trials.Evidence obtained from at least one r<strong>and</strong>omized controlled trial.IIa Evidence obtained from at least one well-designed controlled study without r<strong>and</strong>omization.IIb Evidence obtained from at least one other type of well-designed quasi-experimental studywithout r<strong>and</strong>omization.IIIIVEvidence obtained from well-designed non-experimental descriptive studies, such ascomparative studies, correlation studies <strong>and</strong> case studies.Evidence obtained from expert committee reports or opinions <strong>and</strong>/or clinical experiences ofrespected authorities.12

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