Initial development of a patient-reported outcome measure of disability due to Katakori via evaluating patient comprehensibility and comprehensiveness.
Hiroshi Takasaki, Yusuke Handa
PMID 35035072WHAT IT FOUND
Patients testing a draft questionnaire for Katakori disability found wording, scoring, and missing activities confusing, so developers revised it into a final version.
It is not yet a validated outcome measure.
Key findings
01Participants found several draft items hard to understand or score, including activities that did not apply to them and the 0-to-10 response options.
02Interviews revealed missing concepts, including disturbed sleep, turning the neck, frustration, looking up, and stiff-shoulder appearance.
03Feedback led to a revised questionnaire with simpler instructions, two 6-point Likert scales, added items, and a checklist.
STILL TO COME
How it was doneWhat they foundWhat it means for PTsWhat it means for OTs
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What it does not show
Participants were recruited through the author's website and social media, so they may not represent all people with Katakori. The sample was mostly in its 20s and 40s, and older adults were not examined. The study checked whether patients understood the draft and whether concepts were missing; it did not show that the final questionnaire measures disability accurately, reliably, or responsively. The term and wording are Japanese-specific, and cross-cultural use was not tested.
Declared interests
The authors declared no funding and no conflicts of interest.
The easy way to misread this
Do not read the final KDI as a proven measure of disability or a tool for monitoring treatment. It was developed only for patient comprehensibility and comprehensiveness, and its validity and reliability still need testing.