. 2015 Jan;3(1):12–22.

Table 1.

Demographic characteristics of the preterm infants and parents in the intervention and control groups

Variables	Intervention	Control	test, P value
Infants’ birth weight
Mean±SD	1860.0±560.35	2084.0±298.45	t=1.93, P=0.06
Gestational age
Mean±SD	35.10±2.79	35.60±1.61	t=0.84, P=0.39
Mothers’ age
Mean±SD	27.17±5.14	25.31±6.19	t=0.98, P=0.32
Fathers’ age
Mean±SD	31.34±5.40	29.79±4.32	t=-1.20, P=0.23
Mother’s education, n (%)
High school and lower	14(48.3)	11(37.9)	χ²=6.46,P=0.16
Diploma and College degree	15(51.7)	18(62.1)	χ²=6.46,P=0.16
Father’ education, n (%)
High school and lower	12(41.4)	11(37.9)	χ²=4.33, P=0.36
Diploma and College degree	17(58.6)	18(62.1)	χ²=4.33, P=0.36
Infant’s sex, n (%)
Male	14(46.7)	15(50.0)	χ²=0.06, P=0.79
Female	16(53.3)	15(50.0)	χ²=0.06, P=0.79