Familial Aggregation and Heritability of Myopia: A Local Population Survey in Shanxi, China

Table 5

Myopia heritability among siblings.

Student status	Siblings	Myopic siblings	q (%)	x	a	b	h^2 (%)
No myopia	181	35	19.33	0.863	1.417
Mild myopia	282	66	23.40	0.739	1.320	0.088	17.50
Moderate myopia	172	69	40.12	0.253	0.966	0.433	86.09
High myopia	48	18	37.50	0.305	1.002	0.394	78.75