Impact of question order on prioritisation of outcomes in the development of a core outcome set: a randomised controlled trial

Table 3 Health professionals: percentage of items rated essential within the non-comparative and comparative context (a contrast effect)

Context of rating	Percentage of items rated essential by a participant, median (IQR)		Difference in medians (clinical minus PROs) (95% CI)^a
Context of rating	PROs (38 items)	Clinical (30 items)	Difference in medians (clinical minus PROs) (95% CI)^a
Appearing first (non-comparative)	56.6 (42.1–85.5)	66.7 (60.0–83.3)	10.1 (−7.7–22.1)
Appearing last (comparative)	60.5 (26.3–89.5)	78.3 (66.7–86.7)	17.8 (−7.5–43.2)
Difference in medians (last minus first) (95% CI)^a	3.9 (−23.7–31.6)	11.6 (0.0–23.3)	+7.7

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