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Table 1 The list of Cochrane Colloquia from which abstracts were analyzed

From: Frequency and characteristics of promissory conference abstracts, i.e. abstracts without results, accepted at Cochrane Colloquia 1994-2020

Cochrane Colloquium Abstracts, N Promissory abstracts, N (%)
1994 Hamilton 46 4 (8.7)
1995 Oslo 61 7 (11.5)
1996 Adelaide 103 17 (16.5)
1997 Amsterdam 220 (194 without duplicates) 20 (10.3)a
1998 Baltimore 108 5 (4.6)
1999 Rome 171 18 (10.5)
2000 Cape Town 209 24 (11.5)
2002 Stavanger 79 6 (7.6)
2004 Ottawa 268 20 (7.5)
2005 Melbourne 316 36 (11.4)
2006 Dublin 261 20 (7.7)
2007 Sao Paulo 136 7 (5.1)
2008 Freiburg 332 8 (2.4)
2009 Singapore 185 9 (4.9)
2010 Keystone 304 27 (8.9)
2011 Madrid 465 37 (8)
2012 Auckland 308 22 (7.1)
2013 Quebec City 612 (593 without duplicates) 44 (7.4)a
2014 Hyderabad 350 28 (8)
2015 Vienna 651 46 (7.1)
2016 Seoul 441 24 (5.4)
2017 Cape Town [Global Evidence Summit] 954 95 (10)
2018 Edinburgh 594 61 (10.3)
2019 Santiago 538 42 (7.8)
2020 Abstracts 585 90 (15.4)
  1. aPercentage calculated from the number of abstracts without duplicates