Table 1 Study characteristics of articles included in the meta-analysis and/or qualitative synthesis
Author, publication year | Country | Study design | Current season | Prior season | Influenza type | Age group |
|---|---|---|---|---|---|---|
Jimenez-Jorge et al., 2012 [19] | Spain | Test-negative case-control | 2010–2011 | 2009–2010 | H1N1 | All ages |
Martinez-Baz et al., 2013 [20] | Spain | Test-negative case-control | 2010–2011 | 2009–2010 | H1N1 | All ages |
Skowronski et al., 2012 [28] | Canada | Test-negative case-control | 2010–2011 | 2009–2010 | H1N1 | All ages |
Syrjanen et al., 2014 [33] | Finland | Cohort | 2010–2011 | 2009–2010 | H1N1 | 18–75 years |
Fu et al., 2015 [17] | China | Case-control | 2012–2013 | 2011–2012 | H1N1 | (a) 20–35 months, 1 current dose; (b) 20–35 months, 2 current doses; (c) 3–6 years |
Gaglani et al., 2016 [18] | USA | Test-negative case-control | 2013–2014 | 2009–2010 to 2012–2013 | H1N1 | ≥ 9 years |
Ohmit et al., 2016 [22] | USA | Prospective cohort study | 2013–2014 | 2012–2013 | H1N1 | (a) 9 and older; (b) under 9 years |
Thompson et al., 2014b [35] | USA | Case-control | 2010–2011 and 2011–2012 | 2009–2010 and 2010–2011 | H1N1, H3N2, B | Mean age 30 years |
Skowronski et al., 2014b [29] | Canada | Test-negative case-control | 2011–2012 | 2010–2011 | H1N1, H3N2, B | ≥ 2 years |
Rondy et al., 2015 [25] | France, Italy, Lithuania, Spain | Test-negative case-control | 2012–2013 | 2011–2012 | H1N1, H3N2, B | ≥ 18 years |
Skowronski et al., 2014a [27] | Canada | Test-negative case-control | 2012–2013 | 2011–2012 | H1N1, H3N2, B | ≥ 2 years |
Valenciano et al., 2016 [36] | Germany, Hungary, Ireland, Italy, Poland, Portugal, Romania, Spain | Test-negative case-control | 2014–2015 | 2013–2014 | H1N1, H3N2, B | All ages |
Pebody et al., 2013 [24] | UK | Test-negative case-control | 2010–2011 | 2009–2010 | H1N1, B | All ages |
Skowronski et al., 2015 [30] | Canada | Test-negative case-control | 2013–2014 | 2012–2013 | H1N1, B | ≥ 2 years |
McLean et al., 2014 [6] | USA | Test-negative case-control | 2004–2005 to 2012–2013 | Variable | H3N2, B | (a) 9 to 49; (b) 50 and older |
McLean et al., 2015 [21] | USA | Test-negative case-control | 2012–2013 | 2011–2012 | H3N2, B | (a) 9 to 17; (b) 18 to 49; (c) 50 to 64; (d) 65 and older |
Thompson et al., 2016 [34] | USA | Test-negative case-control | 2011–2012 and 2012–2013 | 2010–2011 and 2011–2012 | H3N2, B | 2–8 years, 1 dose prior season |
Skowronski et al., 2016 [7] | Canada | Test-negative case-control | 2014–2015 | 2013–2014 | H3N2, B | ≥ 2 years |
Simpson et al., 2015a[26] | Scotland | Test-negative case-control | 2008–2009 | 9 prior seasons | All influenza | All ages |
Castilla et al., 2011a [15] | Spain | Nested test-negative case- control | 2010–2011 | 2009–2010 | All influenza | All ages |
Ohmit et al., 2014 [8] | USA | Test-negative case-control | 2011–2012 | 2010–2011 | H3N2 | ≥ 9 years |
Ohmit et al., 2015a [23] | USA | Prospective cohort study | 2012–2013 | 2011–2012 | All influenza | All ages |
Smithgall et al., 2016a [31] | USA | Surveillance | 2013–2014 | 2012–2013 | All influenza | All ages |
Castilla et al., 2016a [16] | Spain | Test-negative case-control | 2014–2015 | 2013–2014 and 2012–2013 | All influenza | All ages |
Sullivan and Kelly, 2013a [32] | Australia | Re-analysis | (a) Southern Hemisphere 2011; (b) Southern Hemisphere 2012 | Southern Hemisphere 2010 and 2011 | All influenza | All ages |
Petrie et al., 2016 [37] | USA | Test-negative case-control | 2014–2015 | 2013–2014 | H3N2 | ≥ 18 years |