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