Table 1.

Comparison of age and gender of children and mothers' age and education level between two groups

	Study group	Control group
	(n = 45)	(n = 90)	P
Age of children, mo			.845 a
Median (IQR)	99.0 (63.3 ‐ 139.5)	106.7 (53.0 ‐ 159.1)
Gender, n(%)			1.00 b
Female	22 (48.9)	44 (48.9)
Male	23 (51.1)	46 (51.1)
Age of mothers, y	34.0 (31.0 ‐ 41.5)	38 (32.0 ‐ 44.0)	.083 a
Education level of mothers n(%)
Primary school	13 (28.9)	4 (4.4)
Middle school	7 (15.6)	0 (0)
High school	13 (28.9)	21 (23.3)	<.001 b
University	11 (24.4)	53 (58.9)
Post graduate	1 (2.2)	12 (13.3)

^a Mann‐Whitney U test.

^b Chi‐square test.