Research Article
Uncovering Indicators of the International Classification of Functioning, Disability, and Health from the 39-Item Parkinson's Disease Questionnaire
Table 4
Rasch item and fit statistics for the final ICF scales of the PDQ-.
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erformed with the sample divided into three class intervals according to person locations on the measured construct. isted in location order. Item numbers refer to the original PDQ-39 questionnaire. A total of nine original PDQ-39 items (numbers 3, 8, 9, 10, 19, 27, 31, 34, and 35) were excluded. ounded to two decimals. xpressed in linear log-odds units (logits). Mean item location is zero with positive values representing more health problems. esiduals summarize the deviation of observed from expected responses. hi-square values summarize the deviation of observed from expected responses across the three class intervals of people. Higher values represent larger deviations. -statistics from one-way ANOVAs of deviations from model expectation across the three class intervals of people. eliability index analogous to Cronbach’s alpha. following Bonferroni correction. ICF: International Classification of Functioning, Disability and Health; AP: Activity and Participation; BF: Body Functions and Structures; E: Environment; SE: standard error; PSI: person separation index. |