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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