Study characteristics and demographics | Study Quality Characteristics | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Author (year) | Country | Study period | Number of cases | Incidence of UC (per 100,000) | Methods of diagnosis defined | Diagnosis based on recognized criteria | Urban/rural defined | Urban population >10,000 | Time of exposure | Multiple levels of exposure |
Ulcerative Colitis | ||||||||||
Mate-Jimerez 1994[39] | Spain | 1981-88 | 111 | 3.16 | Yes | Yes | Yes | Yes | At diagnosis | No |
Ekbom 1991[40] | Sweden | 1965-83 | 2509 | 10.5 | Yes | Yes | Yes | No | At diagnosis | No |
Linden 1971[19] | Finland | 1967 | 223 | 4.76 | No | N/A | No | No | At diagnosis | No |
Probert 1992[32] | UK | 1972-80 | 192 | 5.33 | Yes | Yes | Yes | No | At diagnosis | Yes |
Probert 1992[32] | UK | 1981-89 | 211 | 7.29 | Yes | Yes | Yes | No | At diagnosis | Yes |
Niv 1990[33] | Israel | 1967-86 | 43 | 2.33 | Yes | No | Yes | No | At diagnosis | Yes |
Kildebo 1990[22] | Norway | 1983-86 | 179 | 13.2 | Yes | Yes | No | No | At diagnosis | No |
Gheorghe 2004[23] | Romania | 2002-03 | 163 | 0.97 | Yes | Yes | No | No | At diagnosis | No |
Sincic 2006[41] | Croatia | 2000-04 | 70 | 4.6 | Yes | Yes | Yes | No | At diagnosis | No |
Tsianos 1994[24] | Greece | 1982-91 | 61 | 4.18 | Yes | Yes | No | No | At diagnosis | Yes |
Ladas 2005[34] | Greece | 1990-94 | 56 | 10.6 | Yes | Yes | Yes | Yes | At diagnosis | Yes |
Moller 1971[20] | Finland | 1956-67 | 505 | 1.07 | Yes | Yes | No | No | At diagnosis | No |
Blanchard 2001[42] | Canada | 1987-96 | 1763 | 15.6 | Yes | Yes | Yes | No | At diagnosis | No |
Green 2006[15] | Canada | 1990-01 | N/A | 13.5 | No | N/A | Yes | No | At diagnosis | No |
Lakatos 2003[43] | Hungary | 1977-01 | 560 | 5.89 | Yes | Yes | Yes | No | At diagnosis | No |
Manousos 1996[44] | Greece | 1990-94 | 117 | 8.9 | Yes | Yes | Yes | No | At diagnosis | No |
Wigley 1962[35] | New Zealand | N/A | 132 | N/A | Yes | No | Yes | Yes | At diagnosis | Yes |
Latour 1996[45] | Belgium | 1993-94 | 36 | 3.5 | Yes | Yes | Yes | No | At diagnosis | No |
Crohn’s Disease | ||||||||||
Kyle 1971[47] | UK | 1955-69 | 166 | 1.98 | Yes | Yes | Yes | No | At diagnosis | No |
Jayanthi 1992[48] | UK | 1972-80 | 161 | 2.89 | Yes | Yes | Yes | Yes | At diagnosis | No |
Jayanthi 1992[48] | UK | 1981-89 | 233 | 4.48 | Yes | Yes | Yes | Yes | At diagnosis | No |
Mate-Jimerez 1994[39] | Spain | 1981-88 | 57 | 1.61 | Yes | Yes | Yes | Yes | At diagnosis | No |
Ekbom 1991[40] | Sweden | 1965-83 | 1469 | 6.09 | Yes | Yes | Yes | No | At diagnosis | No |
Shivananda 1987[36] | Netherlands | 1979-83 | 54 | 3.90 | Yes | Yes | Yes | No | At diagnosis | Yes |
Kildebo 1989[22] | Norway | 1983-86 | 82 | 5.85 | Yes | Yes | No | No | At diagnosis | No |
Kyle 1992[49] | Scotland | 1955-88 | 856 | 5.65 | Yes | Yes | Yes | No | At diagnosis | No |
Manousos 1996[44] | Greece | 1990-94 | 37 | 3.00 | Yes | Yes | Yes | Yes | At diagnosis | No |
Gheorghe 2004[23] | Romania | 2002-03 | 85 | 0.51 | Yes | Yes | No | No | At diagnosis | No |
Sincic 2006[41] | Croatia | 2000-04 | 100 | 6.50 | Yes | Yes | Yes | No | At diagnosis | No |
Phavichitr 2003[25] | Australia | 1971-01 | 351 | 1.02 | Yes | Yes | No | No | At diagnosis | No |
Moum 1996[50] | Norway | 1990-93 | 225 | 5.86 | Yes | Yes | Yes | No | At diagnosis | No |
Blanchard 2001[42] | Canada | 1987-96 | 1765 | 15.6 | Yes | Yes | Yes | No | At diagnosis | No |
Green 2006[15] | Canada | 1990-01 | N/A | 14.8 | No | N/A | Yes | No | At diagnosis | No |
Lakatos 2003[43] | Hungary | 1977-01 | 212 | 2.23 | Yes | Yes | Yes | No | At diagnosis | No |
Nyhlin 1986[51] | Sweden | 1974-81 | 253 | 4.90 | Yes | Yes | Yes | No | At diagnosis | No |
Ruiz Ochoa 1984[30] | Spain | 1976-83 | 152 | 0.80 | Yes | Yes | No | No | At diagnosis | No |
Sedlack 1980[31] | USA | 1935-75 | 103 | 4.20 | Yes | No | No | No | At diagnosis | No |
Brandes 1983[52] | Germany | 1964-75 | 97 | 3.00 | Yes | No | Yes | No | At diagnosis | No |
Latour 1996[45] | Belgium | 1993-94 | 56 | 5.50 | Yes | Yes | Yes | No | At diagnosis | No |