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Table 3 Results of the polytomous Rasch model for the capacity 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 Original Questions Chile Sri Lanka
Recoding strategy Outfit Infit Location Thresholds Recoding strategy Outfit Infit Location Thresholds
     1 2      1 2 3 4
WG1 B5002 Do you have difficulty seeing, even if wearing glasses? 00122 1,326 1,258 -1,326 − 2,387 − 0,264 Collapsed Testlet 1,666 1,119 2,235 2,235    
WG2 B5003 Do you have difficulty hearing, even if using a hearing aid? 00122 1,143 1,153 0,879 0,556 1,203
WG3 B5004 Do you have difficulty walking or climbing steps? 00122 0,615 0,723 0,060 −0,320 0,441 00122 1,005 1,037 − 0,831 − 1,453 − 0,209   
WG4 B5005 Do you have difficulty remembering or concentrating? 00122 0,870 0,927 0,512 −0,794 1,817 00122 1,011 1,020 0,137 −0,761 1,035   
WG5 B5006 Do you have difficulty (with self-care such as) washing all over or dressing? 00112 0,370 0,691 1,748 1,220 2,277 00122 0,878 0,871 1,559 1,023 2,096   
I5007 B5007 How much difficulty do you have sleeping because of your health? 00122 0,836 0,918 −0,076 −0,662 0,510 00122 1,030 1,079 0,352 −0,239 0,943   
I5009 B5008 How much difficulty do you have doing house tasks because of your health? 00122 0,591 0,713 0,553 0,351 0,754 00122 0,551 0,654 0,448 −0,293 1,190   
I5011 B5009 Because of your health, how much difficulty do you have with joining community activities, such as festivities, religious or other activities? 01112 0,988 0,950 0,471 0,181 0,761 00122 0,641 0,683 0,371 −0,176 0,919   
I5013 & I5014 B5010 How much difficulty do you have with feeling sad, low or depressed because of your health? How much difficulty do you have with feeling worried, nervous or anxious because of your health? Collapsed Testlet 0,894 0,899 −0,640 −2,001 0,720 Collapsed Testlet 0,974 1,082 0,108 −0,203 − 1,788 2,467 − 0,044
I5015 B5011 Because of your health, how much difficulty do you have getting along with people who are close to you, including your family and friends? 00122 0,943 1,004 1,547 1,110 1,985 00122 0,610 0,717 0,844 −0,128 1,815   
I5017 B5012 How much bodily aches or pain do you have? 00122 0,846 0,835 − 1,180 − 2,351 − 0,008 00122 1,028 1,037 − 1,135 − 2,413 0,143