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

Table 3

Comparison of myopia status between parents and students.

Status	No myopia	Mild myopia	Moderate myopia	High myopia
Myopic parents	169 (34.49%)	182 (37.14%)	108 (22.04%)	31 (6.33%)
Nonmyopic parents	478 (36.18%)	539 (40.74%)	25 5(19.27)	51 (3.85%)
χ2	0.419	1.932	1.709	5.058
	0.517	0.164	0.191	0.025