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Table 1 Characteristics of the 8 publications included in the meta-analysis

From: SHMT1 C1420T polymorphism contributes to the risk of non-Hodgkin lymphoma: evidence from 7309 patients

Studya Country Ethnicity Source of controls Sample sizes (cases/controls) HWE (controls) MAF
Skibola (2004) [22] USA Caucasian Population-based 333/729 0.509 0.32
Lightfoot (2005) [23] USA Caucasian Population-based 589/754 0.181 0.32
Lee (2007) [24] Australia Caucasian Population-based 553/498 0.129 0.32
Lim (2007) [25] USA Mixedb Population-based 743/629 0.283 0.31
Berglund (2009) [26] Sweden Caucasian Population-based 258/241 0.630 0.32
Weiner (2011) [27] Russia Caucasian Population-based 141/504 0.357 0.33
Li (2013) [28] USA Mixedb Population-based 446/517 0.044 0.30
Niclot (2006) [29] France Caucasian Population-based 169/205 0.547 0.31
  1. USA the United States of America, HWE Hardy–Weinberg equilibrium, MAF minor allele frequency
  2. aEach study is presented as the first author’s last name followed by the year of publication
  3. bMixed: in the study, the genotyping data were mixed from different ethnic populations