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

Table 2 Patients: percentage of items rated essential within the non-comparative and comparative context (a consistency 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)	65.8 (47.4–89.5)	96.7 (73.3–100.0)	30.9 (11.8–39.2)
Appearing last (comparative)	89.5 (60.5–97.4)	96.7 (63.3–100.0)	7.2 (−1.4–13.2)
Difference in medians (last minus first) (95% CI)^a	23.7 (10.5–40.8)	0.0 (0.0–20.0)	−23.7

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