Influence of the interaction between parental myopia and poor eye habits when reading and writing and poor reading posture on prevalence of myopia in school students in Urumqi, China

Table 2 Analysis of heritability of myopia using Falconer’s method

		Number of parents	Number with myopia	Prevalence of myopia(%)	χ²	P	q	X	a	h²(%)
Sex
Boys	Emmetropia¹⁾	4518	532	11.78	7.04	<0.01	0.8822	1.185	1.675
Boys	Myopia	2290	657	28.69			0.7131	0.553	1.180	66.57
Girls	Emmetropia¹⁾	3930	453	11.53			0.8847	1.200	1.688
Girls	Myopia	3028	884	29.19			0.7081	0.553	1.180	67.82
Ethnicity
Han	Emmetropia^a	3350	479	14.30	274.60	<0.01	0.8570	1.067	1.579
Han	Myopia	3778	1205	31.90			0.6810	0.468	1.118	65.02
Other	Emmetropia^a	5098	506	9.93			0.9007	1.287	1.760
Other	Myopia	1540	336	21.82			0.7818	0.772	1.346	52.71

ISSN: 1471-2415