Table 4.

Sibling correlations and estimates of narrow-sense heritability

Trait	Correlation		Heritability		p*	n†
	Estimate	SE	Estimate	SE
FECD∞ (binary)	0.152	0.052	0.304	0.105	0.0043	447
FECD score, worse eye	0.184	0.049	0.368	0.097	0.0002	625
FECD score, OD	0.191	0.050	0.381	0.099	0.0002	595
FECD score, OS	0.196	0.049	0.392	0.099	0.0001	604
Corneal Thickness, overall	0.233	0.068	0.466	0.136	0.0010	358
Corneal Thickness, OD	0.153	0.071	0.305	0.144	0.034	287
Corneal Thickness, OS	0.286	0.076	0.572	0.152	0.0004	305

^*p, two-tailed p value for test of H₀: correlation = 0;

^†n, number of sibling pairs contributing to the calculation:

^∞Fuchs’ Endothelial Corneal Dystrophy