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Table 1 Characteristics of included studies

From: Registration of published randomized trials: a systematic review and meta-analysis

Reference Medical specialty Time period for RCT publication Identification of trials Journals (N) Trials (N) Assessment of registration Registries searched
Reporting Search Email CT.gov ISRCTN WHO ICTRP ANZCTR National registries
Ostervig [59] Anesthesiology 2009–2014 Single journal 1 200 Yes Yes No Yes Yes No No Yes
Jones [49] Anesthesiology 2007; 2010; 2013; 2010 Selection of high IF journals 6 860 Yes Yes Yes Yes Yes Yes No No
Nankervis [56] Atopic dermatitis 01/2007–07/2011 SR of eczema RCTs 109 Yes Yes No No No Yes No No
Mathieu [22] Cardiology, rheumatology, gastroenterology 2008 SR of RCTs in cardiology, rheumatology, and gastroenterology 22 323 Yes Yes Yes Yes Yes Yes No Yes
Wiebe [71] Cardio-thoracic surgery 2008–2015 Selection of high IF journals 4 287 Yes Yes Yes Yes Yes Yes No Yes
Emdin [42, 58] Cardiovascular disease 12/2012 SR of cardiovascular disease RCTs 191 Yes Yes No No No Yes No No
Cybulski [37] Clinical psychology 2013 Selection of high IF journals 25 101 Yes Yes Yes Yes No Yes No No
Anand [32] Critical care 01/2005–08/2011 SR of RCTs in critical care 90 Yes Yes Yes Yes No No Yes No
Shinohara [66] Depression 2011–2013 SR of RCTs of cognitive behavioral therapy and new-generation antidepressants 170 Yes No Yes Unclear
Jones [48] Emergency medicine 2008–2011 Selection of high IF journals 5 123 Yes Yes No Yes Yes Yes No No
Farquhar [43, 44] Fertility medicine 2010–2014 SR of RCTs of fertility treatments NA 693 Yes Yes Yes Yes No Yes No No
Li [52] Gastroenterology and hepatology 2009–2012 Selection of high IF journals 10 305 Yes Yes No Yes Yes Yes Yes No
Mann [53] Geriatrics 2008–2012 Selection of high IF journals 5 220 Yes Yes No No No Yes No No
McGee [54] Kidney transplantation 10/2005–12/2010 SR of kidney transplantation RCTs 307 No Yes No No No Yes No No
Gray [46] Nursing 11/2011–09/2016 Key general and mental health journals in nursing 3 135 Yes Yes Yes Yes Yes No No Yes
Byrne [36] Obesity 01/2011–06/2016 Selection of specialty journals 4 223 Yes Yes Yes Yes Yes Yes Yes Yes
You [33, 72] Oncology 2005–2009 Journals thought to publish majority of oncology RCTs 10 366 Yes Yes No Yes Yes No No No
Smail-Faugeron [68] Oral health 2013 Selection of high IF journals 15 317 Yes Yes No No No Yes No No
Hamm [21] Pediatrics 2007 SR of pediatric RCTs 300 Yes Yes No Yes Yes Yes No Yes
Gates [45] Pediatrics 2012 SR of pediatric RCTs 300 Yes Yes No Yes Yes No No No
Rosati [64] Pediatrics 07/2013–11/2013 Single journal 1 20 Yes Yes No Yes Yes No Yes Yes
Pinto [61] Physical therapy 2009 Indexed in PEDro 200 Yes Yes Yes Yes Yes Yes Yes Yes
Pidgeon [60] Plastic surgery 04/2014–03/2015 Selection of high IF journals 3 24 No Yes No Yes Yes Yes No No
Scott [65] Psychiatry 2009–2013 Selection of high IF journals 5 181 Yes Yes Yes Yes Yes No No Yes
Milette [55] Psychosomatic and behavioral medicine 01/2008–09/2009 Selection of high IF journals 4 63 Yes Yes Yes Yes Yes Yes No Yes
Riehm [63] Psychosomatic and behavioral medicine 01/2013–10/2014 Selection of high IF journals 4 76 Yes Yes Yes Yes Yes Yes No Yes
Bradley [35] Psychotherapy 2010–2014 Selection of high IF journals 5 112 Yes Yes Yes Yes Yes Yes No Yes
Sims [67] Shoulder arthroplasty 2005–2015 SR of shoulder arthroplasty RCTs 10 37 Yes Yes Yes Yes Yes Yes No No
Killeen [50] Surgery 2009–2010 Selection of high IF journals 10 246 Yes Yes Yes Yes Yes Yes No Yes
Hardt [47] Surgery 06/2012–12/2012 Selection of high IF journals 10 103 Yes Yes No No No Yes No No
Kunath [51] Urology 2009 Selection of high IF journals 10 106 Yes Yes No No No Yes No No
Potentially overlapping studies
Bonnot [34] Anesthesiology 2013 Selection of high IF journals 12 183 Yes Yes Yes No No Yes No No
El-Boghdadly [41] Anesthesiology 01/201412/2016 Single journal 1 90 Yes Yes No Yes Yes No Yes Yes
Norris [57] Diabetes, osteoporosis, lip-modifying agents 2005–2010 Comparative effectiveness reviews 299 No Yes No No No Yes No No
Dekkers [40] Multiple 2004–2012 Trial protocols submitted to ethics committee 54 Yes Yes No No No Yes No No
Dechartres [38] Multiple 2006–2014 Cochrane reviews 322 Yes Yes Yes Yes No Yes No No
Dekkers [39] Multiple 02/2009 SR of non-inferiority RCTs in Core Clinical Journals 121 133 Yes Yes No Yes Yes No No No
Reveiz [62] Multiple 2010 SR of RCTs from Latin America and Caribbean 526 No Yes No No No Yes No No
Van de Wetering [70] Multiple 11/2010 Core Clinical Journals 121 302 Yes Yes Yes Yes Yes Yes No No
Walker [69] Multiple 05/2011–05/2012 Selection of high IF journals 2 76 Yes Yes No Yes Yes No No Yes
  1. SR systematic review, RCT randomized controlled trial, IF impact factor, PEDro Physiotherapy Evidence Database, CT.gov ClinicalTrials.gov, ISCRCTN International Standard Randomised Controlled Trials Number, WHO ICTRP World Health Organization International Clinical Trials Registry Platform, ANZCTR Australian New Zealand Clinical Trials Registry