Skip to main content

Table 2 Patients: percentage of items rated essential within the non-comparative and comparative context (a consistency effect)

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

Context of rating Percentage of items rated essential by a participant, median (IQR) Difference in medians (clinical minus PROs) (95% CI)a
PROs (38 items) Clinical (30 items)
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
  1. Number of patients: PRO first n = 59; PRO last n = 57
  2. aBias-corrected bootstrap 95% CI