Sonja Mensch

37 A systematic review of the literature Table 4. (continued) Instrument Study Study population Psychometrics Methodological quality Diagnoses N Age (Y) COSMIN property Results Rating COSMIN boxes* 1 Rating of results* 2 Lower extremity physical functioning and mobility skills (LE85) (Gorton et al., 2010) Spastic CP 81 Construct validity Correlation between LE85 and Paediatric Quality of Life Inventory CP overall score r=-.76, 95% CI -.65 to -.84, p<.0001 Good + Motor function measure scale (MFM) (Berard et al., 2005) Neuro- muscular diseases 303 6-62 Internal consistency Cronbach’s alpha coefficient 0.99 Fair + 50 Inter-rater reliability Cohen’s kappa coefficients ranged from .81 to .94 (excellent) for nine items, from .61 to .80 (good) for 20 items and from .51 to .60 (moderate) for only three items. Poor - Intra-rater reliability Agreement coefficients for intra-rater test–retest were excellent (0.81–0.94) for 25 items, and good (0.61– 0.80) for seven items. Poor + Test-retest reliability The intra- and inter-rater agreement coefficients (ICC) were all excellent (.96–.99) for the total score and for the three dimensional sub-scores. Poor + Content validity Therapists estimated that the items of the scale assessed severity of motor disability correctly and thoroughly Poor ?