Identified studies | ||
# | % | |
Year published | ||
Before 2010 | 1 | 0.5% |
2010 | 6 | 2.9% |
2011 | 18 | 8.7% |
2012 | 17 | 8.2% |
2013 | 20 | 9.7% |
2014 | 30 | 14.5% |
2015 | 38 | 18.4% |
2016 | 57 | 27.5% |
2017* | 20 | 9.7% |
Region | ||
Africa | 45 | 21.7% |
USA | 50 | 24.2% |
South-East Asia | 19 | 9.2% |
Europe | 2 | 1.0% |
Eastern Mediterranean | 26 | 12.6% |
Western Pacific | 9 | 4.3% |
Multiple | 38 | 18.4% |
NA | 18 | 8.7% |
Article type | ||
Systematic review | 36 | 17.4% |
Non-systematic review | 17 | 8.2% |
Primary research (all) | 127 | 61.4% |
Primary research - quantitative | 85 | 41.1% |
Primary research - qualitative | 19 | 9.2% |
Primary research - mixed methods | 23 | 11.1% |
Conceptual literature | 27 | 13.0% |
*the search concluded on 31 May, 2017.
NA, not available.