Relationship between Family and Myopia: Based on the Jiangsu School Student Myopia Study

Table 2

Trends of elevated blood pressure, dental caries, obesity, and myopia among Chinese children and adolescents by different family types.

Family type	Male/female	Elevated blood pressure (%)	Dental caries (%)	Obesity (%)	Myopia (%)
Nuclear family	1555/1294	13.8^#	38.8^#	18.3^#	60.0^#
Extended family	1646/1426	14.3^^	46.6	19.5	52.0^^
Single-parent family	388/392	12.7^+	44.2	18.3^+	54.7^+
Left-behind family	169/153	18.7^#^+	44.4^#	23.6^#+	50.9^#^+
Total	3758/3265	14.1	43.1	19.1	55.5

^#Nuclear family vs. left-behind family, . ^{^}Extended family vs. left-behind family, . ⁺Single-parent family vs. left-behind family, .