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Table 4 Use of COS in trials

From: A survey of knowledge, perceptions and use of core outcome sets among clinical trialists

  Yes No Don’t know
N (%) N (%) N (%)
Involved in a trial that used a COS 21 (55.3) 15 (39.5)
All COS outcomes used in trial 9 (42.9) 10 (47.6) 2 (9.5)
Search conducted to identify COS for use in triala 6 (15.8) 7 (18.4)
Sources used to identify other trial outcomes
 Patient and public involvement 15 (71.40) 6 (28.6)  
 Practitioner opinion 15 (71.40) 6 (28.6)  
 Outcomes used in other trials 17 (81) 4 (19)  
 Recommendations from a professional body 11 (52.4) 10 (47.6)  
 Recommendations from a funding body 0 21 (100)  
 Information from a feasibility/pilot study 9 (42.9) 12 (57.1)  
 Consensus process among all colleagues involvedb 1 (4.76) 20 (95.24)  
 Personal experience and expertiseb 1 (4.76) 20 (95.24)  
 Aim of the interventionb 1( 4.76) 20 (95.24)  
  Median Range IQR
Number of trials involved in that used a COS 1 1–10 2.25
  1. 36 trialists, who had previously reported familiarity with COS, provided data on COS use in trials
  2. IQR interquartile range
  3. aQuestion asked to participants who reported not being involved in a trial that used a core outcome set (n = 15)
  4. bSources self-reported by participants