Table 1 Characteristics of studies included
Citation | Study type | Location | Years with data | Migrant (N) | Non-migrant (N) | Study quality |
|---|---|---|---|---|---|---|
Avendano, 2000  [43] | Cohort | Canada | 1986–1999 | 38 | 2 | 9/9 |
Bartu et al., 2010 [46] | Case–control | Czech Republic | 2001–2009 | 17 | 33 | 7/9 |
Blaas et al., 2008 [49] | Case series | Germany | 1997–2006 | 4 | nr | 9/9 |
Cameron & Harrison, 1997 [54] | Case series | New Zealand | 1988–1995 | 7 | 1 | 7/9 |
Donnan et al., 2017 [32] | Case series | Australia | 2005–2014 | 14 | nr | 9/10 |
Ferrara et al., 2005 [51] | Cohort | Italy | 1995–1999 | 39 | 88 | 9/9 |
Ferrer et al., 2010 [56] | Cohort | USA | 1994–2007 | 48 | nr | 9/9 |
Flament-Saillour et al., 1999 [48] | Case–control | France | 1994–1996 | 32 | 19 | 8/9 |
Judge et al., 2016 [45] | Case series | Australia | 2004–2013 | 6 | nr | 7/9 |
Kherad et al., 2009 [55] | Cohort | Switzerland | 1999–2003 | 5 | nr | 11/11 |
Manfredi et al., 2009 [52] | Cohort | Italy | 2006–2008 | 2 | nr | 7/9 |
Masjedi et al., 2008 [50] | Cohort | Iran | 2002–2006 | 28 | 23 | 9/9 |
Mignone et al., 2014 [53] | Case series | Italy | 2006–2010 | 1 | 1 | 8/9 |
Minion et al., 2013 [44] | Case series | Canada | 1997–2008 | 3 | 2 | 10/10 |
Vasankari et al., 2012 [47] | Cohort | Finland | 1994–2005 | 14 | 5 | 9/9 |