Table 1 Characteristics of included IPD-NMAs
Items | Frequency | Proportion (%) |
|---|---|---|
Publication year | ||
 2007 | 1 | 4.8 |
 2010 | 1 | 4.8 |
 2011 | 1 | 4.8 |
 2012 | 5 | 23.8 |
 2013 | 1 | 4.8 |
 2014 | 4 | 19.0 |
 2015 | 2 | 9.5 |
 2017 | 3 | 14.3 |
 2018 | 2 | 9.5 |
 2019 | 1 | 4.8 |
Country of the correspondence author | ||
 USA | 9 | 42.9 |
 UK | 7 | 33.3 |
 France | 3 | 14.3 |
 Cameroon | 1 | 4.8 |
 Netherland | 1 | 4.8 |
Journal impact factor | ||
 0.0 to 3.0 | 6 | 28.6 |
 3.1 to 6.0 | 5 | 23.8 |
 6.1 to 15.0 | 2 | 9.5 |
 > 15.0 | 6 | 28.6 |
 Non-SCI | 2 | 9.5 |
Number of authors | ||
 1 to 3 authors | 0 | 0 |
 4 to 6 authors | 8 | 38.1 |
 7 to 10 authors | 5 | 23.8 |
 11 or more authors | 8 | 38.1 |
With statistician or epidemiologist | 7 | 33.3 |
Authors from 2 or more countries | 15 | 71.4 |
With a priori protocol | 6 | 28.6 |
Format of data | ||
 IPD only | 11 | 52.4 |
 IPD + AD | 10 | 47.6 |
Number of RCTs included: median (IQR) | 19 (9, 26) | Â |
Number of samples included: median (IQR) | 7110 (4906.5, 14261) |  |
Number of interventions included: median (IQR) | 6 (4,7) | Â |
Funding sources | ||
 Industry | 6 | 28.6 |
 Non-industry | 11 | 52.4 |
 Industry + non-industry | 3 | 14.3 |
 Unfunded | 1 | 4.8 |