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Abstract
Purpose. To prepare a Japanese-language version of the Physical Performance Test (PPT) Battery and assess its reliability and validity.
Method. Activity limitations by pain were evaluated by means of the Japanese-language version of the PPT Battery in 82 patients with chronic pain in the limbs and trunk. Two self-report questionnaires, one related to sensory evaluation of pain, and the other related to affective evaluation of pain, and the Functional Independence Measure (FIM), which evaluates activities of daily living, were simultaneously administered to the subjects.
Results. The results for reliability showed that the ICC values for inter-rater reliability and intra-rater reliability were 0.91 or more for every item. The results for validity showed significant associations between the scores for all of the items on the Japanese-language version of the PPT Battery and the total scores on the FIM (p < 0.01). Significant associations were found between 5 of the 8 items on the Japanese-language version of the PPT Battery and affective state due to the pain.
Conclusions. The Japanese-language version of the PPT Battery was shown to possess adequate reliability and validity as a scale for evaluating the activity limitations of patients with chronic limb or trunk pain. The results also suggested that it might be possible to improve the activity limitations of patients with chronic pain by improving their affective state in response to the pain.