Table 1.
Basic information of all included studies.
| Published year of study | Ages | Study countries and regions | Mid-year of study | Numbers of patients | Person-year | Time of study (year) | Incidence ratio men vs. women (95% CI) |
|---|---|---|---|---|---|---|---|
| 1990 (13) | All ages | Oxfordshire, England | 1983 | 66 | 345,948 | 4 | 0.76 (0–1.72) |
| 1991 (14) | All ages | Dijon, France | 1987 | 87 | 678,560 | 5 | 1.57 (1.2–1.94) |
| 1992 (15) | All ages | Valle d'Aosta, Italy | 1989 | 33 | 114,325 | 1 | … |
| 1992 (16) | All ages | Jyväskylä, Finland | 1987 | 158 | 510,545 | 4.3 | 1.14 (0–2.42) |
| 1992 (17) | All ages | Frederiksberg, Denmark | 1990 | 17 | 85,611 | 2 | … |
| 1992 (18) | All ages | Malmo, Sweden | 1989 | 51 | 232,448 | …/1 | … |
| 1995 (19) | All ages | Belluno, Italy. | 1993 | 93 | 211,389 | 1 | 0.67 (0–1.45) |
| 1995 (20) | All ages | Novosibirsk, Russia | 1992 | 31 | 158,234 | 1 | … |
| 1997 (21) | All ages | L'Aquila, Italy | 1996 | 122 | 297,838 | 5 | 1.13 (0.78–1.48) |
| 1997 (22) | ≥15 | Innherred, Norway | 1995 | 45 | 138,590 | 2 | … |
| 1998 (23) | ≥18 | Southern Greece | 1994 | 77 | 161,548 | 2 | 2.05 (1.33–2.83) |
| 1998 (24) | All ages | Bavaria, Germany | 1995 | 48 | 202,900 | 2 | 0.86 (0.52–1.2) |
| 1999 (25) | ≥35 | Shiga, Japan | 1991 | 98 | 148,370 | 5 | 0.94 (0.57–1.31) |
| 2000 (26) | All ages | Southern Sweden | 1996 | 341 | 1,140,000 | 1 | 1.35 (0.78–1.93) |
| 2000 (27) | All ages | Izumo, Japan | 1994 | 267 | 509,124 | 6 | 1.25 (0.54–1.97) |
| 2001 (28) | All ages | Martinique, France | 1999 | 83 | 360,000 | 1 | … |
| 2001 (29) | All ages | Melbourne, Australia. | 1997 | 40 | 133,816 | 1 | 1.96 (1.1–2.82) |
| 2002 (30) | All ages | London, England | 1997 | 151 | 938,132 | 4 | … |
| 2002 (31) | All ages | Örebro, Sweden | 1999 | 44 | 123,503 | 1 | … |
| 2003 (32) | All ages | Southern Italy | 1996 | 62 | 179,186 | 1 | 1.25 (0.5–2.0) |
| 2004 (33) | All ages | Changsha, China | 1993 | 722 | 551,163 | 15 | 1.89 (1.34–2.45) |
| 2004 (34) | All ages | Tbilisi, Georgia | 2002 | 62 | 140,926 | 2.7 | 0.62 (0–1.97) |
| 2004 (35) | All ages | Barbado, Caribbean | 2002 | 42 | 239,068 | 1 | … |
| 2005 (36) | All ages | Iquique, Chile | 2001 | 69 | 396,712 | 2 | 1.79(0–3.8) |
| 2005 (37) | ≥20 | Manhattan, US | 1995 | 155 | 501,618 | 4 | … |
| 2005 (38) | All ages | Scotland, England | 1999 | 50 | 212,704 | 2 | … |
| 2006 (39) | ≥15 | Auckland, New Zealand. | 2002 | 177 | 897,882 | 1 | 0.75 (0–1.62) |
| 2007 (40) | All ages | Matão, Brazil | 2004 | 11 | 75,053 | 1 | 3.26 (1.93–4.59) |
| 2007 (41) | All ages | Oxfordshire, UK | 2004 | 395 | 2,701,909 | 10 | … |
| 2007 (42) | All ages | Takashima, Japan | 1995 | 380 | 831,765 | 15 | … |
| 2007 (43) | All ages | Tartu, Estonia | 2002 | 57 | 202,244 | 2 | |
| 2008 (44) | ≥25 | Mumbai, India | 2006 | 68 | 313,722 | 2 | … |
| 2008 (45) | All ages | Melbourne, Australia | 1998 | 151 | 613,262 | 2 | 1.23 (0.91–1.54) |
| 2009 (46) | All ages | L'Aquila, Italy | 1996 | 549 | 1,488,225 | 10 | 1.02 (0.84–1.20) |
| 2009 (47) | All ages | South Indian | 2005 | 40 | 462,938 | 0.5 | … |
| 2009 (48) | All ages | Joinville, Brazil | 2005 | 94 | 974,094 | 2 | 2.35 (1.65–3.05) |
| 2009 (49) | All ages | Mashhad, Iran | 2006 | 79 | 450,229 | 1 | 0.85 (0.04–1.67) |
| 2010 (50) | All ages | Ludwigshafen, Germany | 2007 | 65 | 335,812 | 2 | … |
| 2010 (51) | All ages | Southern Italy | 2001 | 24 | 77,470 | 2 | 2.37 (0–4.98) |
| 2012 (52) | All ages | VaraŽdin, Croatia | 2008 | 123 | 368,230 | 2 | … |
| 2012 (53) | All ages | Spain | 2006 | 350 | 1,440,979 | 1 | 1.3 (1–1.58) |
| 2012 (54) | All ages | Dublin, Ireland | 2006 | 56 | 294,529 | 1 | … |
| 2013 (55) | All ages | Udine, Italy | 2008 | 95 | 306,624 | … | |
| 2013 (56) | All ages | Northern Portugal | 1999 | 111 | 246,224 | 2 | … |
| 2013 (57) | All ages | Ludwigshafen, Germany | 2008 | 152 | 838,285 | 5 | … |
| 2014 (58) | ≥40 | Hisayama, Japan | 1995 | 53 | 32,854 | 12 | … |
| 2014 (59) | All ages | MediterraneanIsland, Greece | 2011 | 25 | 86,436 | 1 | … |
| 2015 (60) | All ages | Southwestern Nigeria | 2011 | 54 | 491,033 | 1 | 0.9 (0.1–1.72) |
| 2015 (61) | ≥16 | Scotland, England | 2011 | 128 | 695,335 | 1 | … |
| 2016 (62) | All ages | LAquila, Italy | 2012 | 115 | 596,430 | 2 | 1.14 (0.6–1.69) |
| 2017 (63) | ≥35 | Southern Region of Portugal | 2015 | 82 | 280,081 | 1 | 1.69 (0.9–2.46) |
| 2018 (64) | ≥20 | Northeastern Greece | 2011 | 83 | 119,805 | 2 | 1.08 (0.2–1.94) |