RESUMEN
OBJECTIVES: To assess the construct validity of the Level of Sitting Scale (LSS) by examining the relationship between LSS scores and the type and amount of seating supports. METHODS: Secondary analysis of the data for 114 children ≤18 years, with neuromotor disorders who participated in a responsiveness study of the Seated Postural Control Measure. RESULTS: A significant inverse relationship (Spearman rho = -0.42, p < 0.05) was found between LSS scores and amount of seating support provided. Statistically significant differences were also revealed between LSS levels of sitting ability (p < 0.004) and pelvic, thigh, trunk and head seating components and type of seating system, using Kruskal-Wallis test. CONCLUSION: This study provides evidence of construct validity for the LSS in use as a discriminative measure of sitting ability in children with neuromotor disorders. Further validation is justified. Clinically intuitive associations between sitting ability and seating interventions were confirmed.
Asunto(s)
Lesiones Encefálicas/rehabilitación , Parálisis Cerebral/rehabilitación , Limitación de la Movilidad , Enfermedades Neuromusculares/rehabilitación , Equipo Ortopédico , Postura/fisiología , Adolescente , Lesiones Encefálicas/fisiopatología , Parálisis Cerebral/fisiopatología , Niño , Preescolar , Femenino , Humanos , Lactante , Masculino , Enfermedades Neuromusculares/fisiopatologíaRESUMEN
PURPOSE: Responsiveness of the Seated Postural Control Measure (SPCM) and the Level of Sitting Scale (LSS) was explored for children with neuromotor disorders. Total change scores for alignment (SPCM-A), function (SPCM-F) and sitting ability (LSS) were compared with a criterion change measure, the Global Change Scale (GCS). The a priori hypotheses predicted moderate correlations (r>0.40). METHOD: Both SPCM and LSS were administered twice, 6 months apart. Parents and two therapists rated changes in alignment and function, and indicated importance of those changes on the GCS. Participants (n=114) were divided into two groups: those whose posture was expected to change, (with a range of diagnoses) and those who were expected to remain stable (with a diagnosis of cerebral palsy). Ages ranged from 1 to 18 years. RESULTS: Fair-to-moderate significant correlations (pâ≤0.01) were found between SPCM-F and LSS change scores and parents' and therapists' rating of change and importance of change on the GCS. Correlations for SPCM-A change scores were insignificant. The standardised response mean values for SPCM-F and LSS confirmed a minimal clinically important difference. CONCLUSIONS: SPCM-F shows promise as a responsive outcome measure, however; SPCM-A requires further work. LSS may be useful for evaluative purposes, in addition to its role as a classification index.