Additional file 1.
Power analysis of the Χ2-tests for the allele frequency (2 x 2 contingency table, a, degree of freedom (DF) = 1) and the genotype distribution (2 x 3 contingency table, b, DF = 2) concerning the rs3102735 OPG SNP. Power was calculated by given effect size w, α (0.05) and total sample size (a: 1398; b: 699).
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Ney et al. BMC Cancer 2013 13:40 doi:10.1186/1471-2407-13-40