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Table 1 Registered trials using qualitative methods by registry

From: Exploring qualitative methods reported in registered trials and their yields (EQUITY): systematic review

  WHO ICTRP ClincalTrials.gov ISRCTN Overall
Total trials in registry from 1999 to 2016 366,753 233,277 15,301 615,311
Total identified with qualitative keyword 144 1668 665 2477
Total records excluded 46 790 149 985
Total confirmed with qualitative methods 98 878 516 1492
Percentage confirmed with qualitative methods 0.04% 0.4% 3.4% 0.2%
  1. ICTRP International Clinical Trials Registry Platform, ISRCTN International Standard Randomised Controlled Trial Number Registry, WHO World Health Organisation