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Table 5 Results of the polytomous Rasch model for the performance metric

From: Measuring functioning and disability using household surveys: metric properties of the brief version of the WHO and World Bank model disability survey

MDS-Code Brief MDS Code Question   Recoding strategy Outfit Infit Location Thresholds
     1 2 3 4 5 6 7 8
I4005 & I4007 B4001 & B4002 How much of a problem is walking a kilometer for you? How much of a problem is getting where you want to go for you? Chile 012345678 0,724 0,786 −0,479 −0,659 − 1,382 − 0,743 − 0,838 − 0,319 − 0,435 0,433 0,112
Sri Lanka 012345678 0,773 0,797 −0,685 − 1,098 − 1,679 − 1,062 − 0,949 − 0,476 − 0,597 − 0,118 0,501
I4010 & I4012 B4003 & B4004 How much of a problem is being clean and dressed?
How much of a problem is toileting?
Chile 012345678 0,433 0,645 0,594 1,559 − 0,661 0,528 0,027 1,159 0,304 1,695 0,142
Sri Lanka 012345678 0,973 0,953 0,940 1,395 −0,435 0,610 0,915 1,592 0,828 1,536 1,079
I4014 B4005 How much of a problem is looking after your health, eating well, exercising or taking your medicines? Chile 00122 0,649 0,761 0,527 0,247 0,806       
Sri Lanka 00122 0,563 0,665 1,089 0,504 1,673       
I4021 B4006 How much of a problem is feeling tired and not having enough energy? Chile 01234 0,998 1,026 −0,458 − 1,903 − 0,981 0,100 0,953     
Sri Lanka 00122 0,963 0,952 −0,881 − 1,506 − 0,255       
I4031 B4007 How much of a problem is coping with all the things you have to do? Chile 01112 0,859 0,872 0,588 −0,798 1,974       
Sri Lanka 00122 1,028 0,957 0,312 −0,341 0,965       
I4035 B4008 How much of a problem is remembering to do the important things in your day-to-day life? Chile 01234 1,119 1,163 0,370 −0,461 0,135 0,819 0,988     
Sri Lanka 00122 1,160 1,157 0,286 −0,414 0,987       
I4037 B4009 How much of a problem do you have with getting your household tasks done? Chile 00122 0,680 0,747 0,150 −0,106 0,407       
Sri Lanka 00122 0,616 0,683 0,104 −0,350 0,559       
I4040 B4010 How much of a problem do you have with joining community activities, such as festivities, religious or other activities? Chile 01112 1,179 1,063 0,083 −0,263 0,429       
Sri Lanka 00122 0,784 0,801 0,147 −0,152 0,446       
I4045 & I4047 B4011 How much of a problem is getting things done as required at work/school? Chile Collapsed Testlet 1,290 1,282 2,762 1,186 1,488 5,613      
Sri Lanka Collapsed Testlet 2,311 1,371 3,064 1,672 4,456       
I4048 B4012 How much of a problem is using public or private transportation? Chile 01112 0,880 0,859 −0,038 −0,668 0,591       
Sri Lanka 00122 0,986 0,935 −0,522 −0,873 − 0,171