PCDAI scores accurately reflect disease activity as assessed by physician global assessment. A PCDAI score of > or = 30 has acceptable sensitivity and specificity to indicate disease of moderate/severe activity. A PCDAI decrease of 12.5 points or greater following therapeutic intervention accurately reflects a clinically significant response. The PCDAI is an appropriate tool for intervention trials in Crohn disease in children.
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Hyams et al. (2005) studied this question.
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