Table 1

Characteristics of studies included in the meta-analysis
First author Year Country Ethnicity Cancer type Source of controls Cases Controls Case Control HWE
CC CA AA CC CA AA
Andersen[29] 2009 Denmark Caucasian Colorectal cancer PB 359 765 296 58 5 592 161 12 0.782
Campa[31] 2008 Germany Caucasian Colorectal cancer HB 582 517 472 103 7 409 104 4 0.347
Campa[30] 2011 Germany Caucasian Lymphoma HB 1067 1196 898 158 11 957 229 10 0.359
Campa[30] 2011 Germany Caucasian Lymphoma HB 259 1156 224 33 2 921 221 14 0.856
Hu[33] 2007 China Asian Lymphoma MIXED 156 376 60 80 16 181 162 33 0.703
Campa[30] 2011 Germany Caucasian Leukemia HB 321 1196 284 33 4 957 229 10 0.359
Muller[35] 2008 Germany Caucasian Leukemia HB 110 179 100 10 0 160 18 1 0.532
Semsei[36] 2008 Hungary Caucasian Leukemia HB 369 149 294 72 3 121 28 0 0.206
Korenaga[34] 2005 Japan Asian Renal cell carcinoma PB 200 200 124 60 16 92 91 17 0.405
Gardner[32] 2008 America Caucasian Prostate cancer PB 170 141 142 27 1 111 27 3 0.384

PB: population based; HB: hospital based; MIXED: population based and hospital based.

Chen et al.

Chen et al. BMC Cancer 2012 12:383   doi:10.1186/1471-2407-12-383

Open Data