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      Reliability of the PEDro Scale for Rating Quality of Randomized Controlled Trials

      1 , 2 , 3 , 4 , 5
      Physical Therapy
      Oxford University Press (OUP)

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          Abstract

          Background and Purpose. Assessment of the quality of randomized controlled trials (RCTs) is common practice in systematic reviews. However, the reliability of data obtained with most quality assessment scales has not been established. This report describes 2 studies designed to investigate the reliability of data obtained with the Physiotherapy Evidence Database (PEDro) scale developed to rate the quality of RCTs evaluating physical therapist interventions. Method. In the first study, 11 raters independently rated 25 RCTs randomly selected from the PEDro database. In the second study, 2 raters rated 120 RCTs randomly selected from the PEDro database, and disagreements were resolved by a third rater; this generated a set of individual rater and consensus ratings. The process was repeated by independent raters to create a second set of individual and consensus ratings. Reliability of ratings of PEDro scale items was calculated using multirater kappas, and reliability of the total (summed) score was calculated using intraclass correlation coefficients (ICC [1,1]). Results. The kappa value for each of the 11 items ranged from .36 to .80 for individual assessors and from .50 to .79 for consensus ratings generated by groups of 2 or 3 raters. The ICC for the total score was .56 (95% confidence interval=.47–.65) for ratings by individuals, and the ICC for consensus ratings was .68 (95% confidence interval=.57–.76). Discussion and Conclusion. The reliability of ratings of PEDro scale items varied from “fair” to “substantial,” and the reliability of the total PEDro score was “fair” to “good.”

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          Author and article information

          Journal
          Physical Therapy
          Oxford University Press (OUP)
          0031-9023
          1538-6724
          August 01 2003
          August 01 2003
          : 83
          : 8
          : 713-721
          Affiliations
          [1 ]CG Maher, PT, PhD, is Associate Professor, School of Physiotherapy, Faculty of Health Sciences, The University of Sydney, PO Box 170, Lidcombe, New South Wales 1825, Australia
          [2 ]C Sherrington, PT, PhD, is Research Officer, Prince of Wales Medical Research Institute, University of New South Wales, Sydney, New South Wales, Australia
          [3 ]RD Herbert, PT, PhD, is Senior Lecturer, School of Physiotherapy, The University of Sydney
          [4 ]AM Moseley, PT, PhD, is Lecturer, Rehabilitation Studies Unit, Department of Medicine, The University of Sydney
          [5 ]M Elkins, PT, M-HSc, is Research Physiotherapist, Department of Respiratory Medicine, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia
          Article
          10.1093/ptj/83.8.713
          12882612
          0c96ca61-4be6-497a-83df-482fbeb381d1
          © 2003
          History

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