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Table 2 Statistical significance of association

From: Prevalence and heritability of distichiasis in the English Cocker spaniel

Compared breeding combinations

X 2-test

p-value

95 % CI

RR

+/− vs. −/−

3.13

0.08

[−0.01; 0.20]

1.3

+/+ vs. +/−

15.11

<1.0 x 10−4

[0.10; 0.31]

1.4

+/+ vs. −/−

27.76

<1.4 x 10−7

[0.19; 0.41]

1.8

  1. +Parent affected by distichiasis. -Parent not affected by distichiasis