Skip to main content

Table 2 General characteristics of the randomized controlled trials (RCTs) related to the clinical research questions (n = 273)

From: Feasibility of individual patient data meta-analyses in orthopaedic surgery

Characteristics Number of RCTs (%)
(n = 273)
Trial characteristics  
Study design  
 Single-centre 183 (67 %)
 Multicentre 60 (22 %)
 Not reported 30 (11 %)
Location  
 Europe 106 (39 %)
 North America 80 (29 %)
 Asia 78 (29 %)
 Australia and New Zealand 9 (3 %)
Funding  
 Public 96 (35 %)
 Private 49 (18 %)
 Not reported 128 (47 %)
Year of publication  
 2000–2004 46 (17 %)
 2005–2009 112 (41 %)
 2010–2013 115 (42 %)
Journal of publication characteristics  
Type of journal  
 Specialized 260 (95 %)
 Generalist 13 (5 %)
Top 10 impact factor of each specialty  
 No 156 (57 %)
 Yes 117 (43 %)
Journal data sharing policies  
 No policy 241 (88 %)
 Incentive measures 24 (9 %)
 Mandatory 8 (3 %)