• Inge Franki, Chris Van den Broeck, Josse De Cat, Guy Molenaers, Guy Vanderstraeten, and Kaat Desloovere.
• Department of Rehabilitation Sciences and Physiotherapy, Ghent University, Belgium Department of Rehabilitation Sciences, KU-Leuven, Leuven, Belgium inge.franki@ugent.be.
• Clin Rehabil. 2015 Aug 1; 29 (8): 809-15.

ObjectiveTo investigate the agreement between live and video scores of the Gross Motor Function Measure-88.DesignReliability study.SubjectsForty children with bilateral spastic cerebral palsy.InterventionsFifty evaluations were administered according to the test guidelines, and were videotaped. After a minimum interval of one month, the video recordings were again rated by the same assessor. Two physical therapy students also each scored the recordings twice, with a minimal interval of one month.Main MeasuresAgreement between live and video scores as well as inter-rater and intra-rater agreement of the video scores were assessed using intra-class correlation coefficients (ICC), standard error of measurements (SEM), and smallest detectable changes (SDC). Weighted kappa coefficients were used to analyse individual items.ResultsThe live and video scores from the same assessor showed good to very good agreement for the total score (ICC, 0.973; SEM, 2.28; SDC, 6.32) and dimensions B (ICC, 0.938), D (ICC, 0.965), and E (ICC, 0.992) but lower agreement for A (ICC, 0.720) and C (ICC, 0.667). Live-versus-video agreement for the total score was higher than inter-rater agreement by video (ICC, 0.949; SEM, 3.15; SDC, 8.73) but lower than intra-rater agreement by video (ICC, 0.989; SEM, 1.42; SDC, 3.96).ConclusionThe Gross Motor Function Measure-88 can be reliably scored using video recordings. The agreement between live and video scores is lower than the intra-rater reliability using video recordings only. Future clinical trial results should be interpreted using the appropriate SEM and SDC values.© The Author(s) 2014.

16 keywords...

hide…