Table 2.

Examining the association of baseline demographic features and IQ scores of the children^a

Variables	Groups	IQ score	P-value
Sex	Male	111.9 ± 13.7	< 0.001b*
	Female	100.0 ± 17.1
Age, years	< 7.5	110.4 ± 15.9	0.003b*
	≥ 7.5	102.6 ± 16.4
Mother’s education	Below high school diploma	103.1 ± 15.7	0.285c
	High school diploma	106.4 ± 16.4
	Associate degree	107.5 ± 21.1
	Bachelor’s degree	112.7 ± 18.5
	Master’s degree	130.0 ± 0.0
	Doctorate	105.0 ± 0.0
Father’s education	Below high school diploma	100.9 ± 15.7	0.974c
	High school diploma	108.0 ± 16.5
	Associate degree	116.6 ± 17.1
	Bachelor’s degree	108.7 ± 16.0
	Master’s degree	113.0 ± 16.8
	Doctorate	126.0 ± 0.0

Abbreviations: IQ Intelligence Quotient

^*Statistically significant (P-value < 0.05)

^aContinuous data are presented as mean ± standard deviation

^bIndependent t-test

^cANOVA