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Table 1 Characteristics and genotype data extracted from eligible studies

From: Association between XRCC1polymorphism 399 G->A and glioma among Caucasians: a systematic review and meta-analysis

Study (Year) Country Ethnicity Genotyping method Glioma type Mean age Gender (% males)
Felini (2007) USA Caucasian PCR-RFLP Mixed No data No data
Cengiz (2008) Turkey Caucasian PCR-RFLP Mixed 55.2 50.4
Kiuru (2008) Finland Caucasian PCR-RFLP Mixed No data 61.8
Liu (2009) USA Caucasian Array Mixed No data 56.8
Rajaraman (2010) USA Caucasian Taqman Real Time Mixed 51.2 54.7
Yosunkaya (2010) Turkey Caucasian PCR-RFLP Mixed 52.4 39.5
  Cases Controls  
Study (Year) N GG AG AA N GG AG AA HWE p
Felini (2007) 366 158 155 53 427 180 196 51 0.99
Cengiz (2008) 135 51 73 11 87 43 41 3 0.42
Kiuru (2008) 1,019 411 474 134 1,549 645 728 176 0.62
Liu (2009) 373 149 162 62 364 169 145 50 0.35
Rajaraman (2010) 350 142 164 44 478 205 201 72 0.40
Yosunkaya (2010) 119 15 67 37 180 91 71 18 0.87
Total 2,362 926 1,095 341 3,085 1,333 1,382 370