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Table 2 Allelic dependences of iridal hypopigmentation

From: A genome-wide association study reveals a locus for bilateral iridal hypopigmentation in Holstein Friesian cattle

SNP (chromosome) Allele Cases (n = 18) Controls (n = 316) χ 2 P-value OR 0.95 CI
   Obs. Exp. Obs. Exp.     
BTB-00352779 (BTA8) C 23 32.5 580 570.5    0.16 0.076–0.3314
A 13 3.5 52 62.5 30.15 4.0e–08 6.3 3.0172–13.1727
  1. Abbreviations: Obs. Observed number of alleles, Exp. expected number of alleles, χ 2 p-value χ 2- and p-values were determined using a 2 × 2 contingency table and χ 2-statistics, OR odds ratio, 0.95 CI 95% confidence intervals