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Table 3 Mean scores and equivalence test between touch-screen and paper-and-pencil modes

From: Measurement equivalence and feasibility of the EORTC QLQ-PR25: paper-and-pencil versus touch-screen administration

  Paper-and-pencil Touch-screen Equivalence testc
EORTC QLQ-PR25a Mean SD Mean SD 95% CI of Left taile Right taile
Mean differenced p-value p-value
Urinary symptoms (8 items) 19.5 13.5 21.1 13.3 −3.3 to 0.1 <0.001 <0.001
Bowel symptoms (4 items) 5.3 8.6 5.7 7.9 −1.5 to 1.0 <0.001 <0.001
Treatment-related symptoms (6 items) 11.1 10.2 10.3 9.2 −1.1 to 2.9 <0.001 <0.001
Sexual activity (2 items) 19.4 20.2 20.2 20.8 −5.0 to 2.3 0.048 <0.001
Sexual functioning (4 items)b 62.3 22.0 61.8 20.9 −5.7 to 9.5 0.076 0.415
  1. aAll scores were linearly converted to a 0 to 100 scale, with higher scores indicating a higher level of functioning and more severe symptoms.
  2. bSexual functioning items are conditional and only applicable to those being sexually active. A total of 48 patients reported being sexually active in this study.
  3. cBased on the equivalence test using the score 5 as the tolerably difference.
  4. dMean difference = paper-and-pencil mean score - touch-screen mean score.
  5. eLeft tail significance indicates μpaperμtouch-screen > −5. Right tail significance indicated μpaperμtouch-screen < 5. Therefore, both tails significance indicates | μpaperμtouch-screen | < 5.