Dijo Joseph, Rong Hu, Robert Min, Meenakshi Jolly, Sobia Hassan
Use and Utility of Patient After-Visit Instructions at a University Rheumatology Outpatient Clinic: Status and Randomized Prospective Pilot Intervention Study
ACR open rheumatology
study aimed investigate psychometric characteristics pictorial scale perceived movement skill competence pmsc chinese children utilizing principles item response theory irt total 284 children 147 boys aged 410 years mage 739 sd 218 four schools recruited testing adhering principle random sampling rasch model applied evaluate rating scale validity local independence scale dimensionality person item fit statistics differential item functioning dif 1 rating scale validity confirmed monotonically increasing trend average item difficulty measures andrich thresholds 2 however observation standardized residual correlations items remained 03 unequivocally confirmed presence local independence among variables 3 scales dimensions substantiated rasch measures explaining 406 total variance exceeding 40 threshold additionally first contrast eigenvalue 18 explained 880 variance exceeding minimum 31 ratio consequently unidimensionality assumption item supported 4 person item fit statistics indicated requisite reliability separation achieving suitable infit outfit measures pointbiserial correlations exceeding 055 5 regarding gender dif observed majority items exhibit statistically significant gender dif effects p 005 except item 8 bounce ball 274 p 001 dif 051 rasch analysis revealed instrument exhibited strong scale validity among chinese children adhering rasch models unidimensionality local independence principles robust person item reliability separation items demonstrated good fit additionally significant gender difference item 8 bounce ball warrants consideration conclusion pmsc suitable assessing pmsc chinese children