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Table 1 Median, ceiling effect, KS results, and interquartile range of five CHAQ scoring methods.

From: Exploring the ceiling effect of the revised Childhood Health Assessment Questionnaire in a European patient sample

  Scoring method Median (range) Ceiling effect (%) KS-statistic P-value IQR
Cat I Chaq30orig 0.81 (0–2.13) 20.8* 0.87 0.43 1.38
  Chaq30item 0.36 (0–1.04) 20.8* 0.87 0.50 0.43
  Chaq38item 0.38 (0–1.26) 8.3 0.86 0.45 0.54
Cat II Chaq30item -0.24 (-1.26–0.40) 0 0.84 0.49 0.48
  Chaq38item -0.34 (-1.26–0.42) 0 0.69 0.73 0.64