A study of whether video scoring is a reliable option for blinded scoring of the Gross Motor Function Measure-88. (August 2015)

• Record Type: Journal Article
• Authors: Franki, Inge; Van den Broeck, Chris; De Cat, Josse; Molenaers, Guy; Vanderstraeten, Guy; Desloovere, Kaat
• Is Part Of: Clinical rehabilitation. Volume 29:Number 8(2015)
• Page Start: 809
• Page End: 815
• Publication Date: 2015-08
• Subjects: Video scoring -- gross motor function -- cerebral palsy -- physical therapy; Medical rehabilitation -- Periodicals; 617.03
• DOI: 10.1177/0269215514558642
• Languages: English
• ISSNs: 0269-2155

Abstract

Objective: To investigate the agreement between live and video scores of the Gross Motor Function Measure-88. Design: Reliability study. Subjects: Forty children with bilateral spastic cerebral palsy. Interventions: Fifty 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 measures: Agreement 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. Results: The 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). Conclusion: The 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.