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Table 5 Agreement between conference abstract and ClinicalTrials.gov register on outcomes (n = 40 abstract-ClinicalTrials.gov pairs reporting ≥ 1 primary outcome and 152 abstract-clinicaltrials.gov pairs reporting a non-primary outcome)

From: ClinicalTrials.gov registration can supplement information in abstracts for systematic reviews: a comparison study

  Primary Outcome Non-primary outcome
No. (%) No. (%)
Total outcomes reported in abstract 80 (100) 708 (100)
Complete agreement 14 (18) 57 (8)
Partial agreement 39 (49) 205 (29)
Not reported in ClinicalTrials.gov 27 (34) 446 (63)