Reliability And Validity Of Chinese Version Of The Motor Status Scale For Assessing Upper Extremity Function Of Subject With Stroke Hemiplegia

Objective The study used MSS to assess the upper extremity motor function of subjects with stroke hemiplegia,with the aim of exploring the reliability and validity of MSS and attempting to provide evidence for its clinical application in China.Methods 36 subjects with post stroke hemiparesis were included in this study.Rater A assessed the subjects’ upper extremities using MSS and Fugl-Meyer Movement Assessment(FMA-UE)while Rater B with MSS only.All data entry was completed by Microsoft Excel 2010 and the data analysis by SPSS 17.0.The value of 0.05 was selected as the significance level.Internal consistency reliability,inter-rater reliability and split-half reliability was used to test the reliability of MSS while the criteria-related validity and construct validity for the validity of MSS.Results 1.The results of reliability are as follows:(1)The MSS overall Cronbach’s αwas 0.910 and the corresponding values for shoulder/elbow and wrist/hand were 0.924 and 0.886.(2)The scores of before-after split-half reliability for overall MSS,shoulder/elbow and wrist/hand were 0.702,0.847 and 0.898 while the ones of odd-even split-half reliability were 0.972,0.958 and 0.967 respectively.(3)The inter-rater reliability of MSS total scores was 0.998(0.997-0.999)and the corresponding values for shoulder/elbow and wrist/hand were 0.997(0.993-0.998)and 0.999(0.997-0.999).(4)The values of inter-rater reliability for shoulder/elbow,wrist/hand and MSS total score of acute stroke patients were 0.996(0.989-0.999),0.999(0.997-1.000)and 0.999(0.996-1.000)accordingly.The corresponding values for the non-acute counterparts were 0.996(0.991-0.998),0.999(0.977-0.999)and 0.998(0.994-0.999).2.The results of validity are as follows:(1)The Pearson correlation coefficients of the MSS and FMA-UE for the shoulder/elbow,wrist/hand and total scores were 0.870(P<0.001),0.770(P<0.001)and 0.890(P<0.001).(2)The 3 common factors of the exploratory factor in construct validity analysis were wrist/forearm movement,shoulder/joint movement and hand/finger movement with the cumulative contribution to the total variance reaching 66.70%.Conclusion 1.The MSS has satisfactory reliability and reliability,can accurately assessing upper extremity motor function after stroke hemiplegia.This scale is a reliable and effective measurement tool.2.The inter-rater reliability for both acute and non-acute patients were acceptable,indicating the high applicability of MSS for patients from diffirent phases of stroke.3.MSS and FMA-UE assessed Brunnstrom staging Ⅳ or Ⅴ period upper limb motor function of stroke patients had no apparent ceiling effect,but MSS superior FMA-UE.