Inter- and Intra-observer Reliability of the “assessment of Motor Repertoire- 3 to 5 Months” Based on Video Recordings of Infants With PWS
Abstract BackgroundThe “Assessment of Motor Repertoire - 3 to 5 Months”, which is part of Prechtl's General Movement Assessment (GMA), has been gradually applied to infants with genetic metabolic disorders. However, there still have been no studies on the application of GMA for infants with Prader-Williams Syndrome (PWS).Aimsthe purpose of this study was to determine inter- and intra-observer reliability of the assessment tool in PWS population.Study designReliability and agreement study.SubjectsThis was a cross-sectional study of 15 infants with PWS born at average gestational age 38 weeks.Outcome measuresStandardized video recordings of 15 infants with PWS (corrected ages 3 to 5 months) were independently assessed by three observers. Kappa and ICC statistics were applied in inter- and intra-observer reliability analysis.ResultsThe overall reliability ICCs values of “Motor Optimality Score” (MOS) ranged from 0.84 to 0.98 and the regarding pairwise agreement ranged between 0.86 and 0.95 in inter- observe reliability. In addition, ICC values for MOS ranged between 0.95 and 0.98 for respectively testers agreement in intra-observer reliability.The complete agreement reliability (100%) was achieved in subcategories of “Fidgety Movements” and “Movement Character” for the inter- and intra-observer. Moderate to high inter- and intra-observer reliability were found in subcategories of “Repertoire of Co-Existent Other Movements”, “Quality of Other Movements” and “Posture”, with kappa values ranging between 0.63 and 1.00. Conclusionhere were high levels of inter-and intra-observer agreement in the “Assessment of Motor Repertoire - 3 to 5 Months” for infants with PWS. It will be possible to carry out standardized quantitative assessment on the motor performance infants with PWS.