Table 3.

Percentage change in scores on the K-SCQ associated with 2-fold increases in creatinine-adjusted prenatal and postnatal BPA levels

Subcategory of K-SCQ score	Gender	Prenatal BPA			Postnatal BPA
		% change (95% CI)	P-value	P-value for gender difference	% change (95% CI)	P-value	P-value for gender difference
Total	All	3.4 (−0.8, 7.7)	0.1134	0.2464	−1.0 (−5.1, 3.3)	0.6517	0.0034
	Boys	3.7 (−1.4, 9.1)	0.1593		−5.2 (−10.3, 0.1)#	0.0553
	Girls	2.2 (−4.6, 9.4)	0.5359		4.5 (−2.3, 11.8)	0.1966
Social interaction	All	−0.3 (−8.1, 8.1)	0.9365	0.3835	−5.6 (−13.1, 2.5)	0.1708	0.8667
	Boys	−3.2 (−12.1, 6.7)	0.5129		−6.8 (−16.4, 3.8)	0.2003
	Girls	7.0 (−7.0, 23.2)	0.3434		−5.7 (−17.4, 7.8)	0.3904
Social communication	All	3.5 (−3.1, 10.6)	0.3090	0.2167	2.0 (−4.9, 9.3)	0.5848	0.0054
	Boys	6.4 (−2.3, 15.8)	0.1548		−5.2 (−13.5, 3.9)	0.2551
	Girls	−1.0 (−10.8, 9.9)	0.8526		11.8 (0.6, 24.3)*	0.0392
Behavior patterns	All	5.5 (−1.9, 13.5)	0.1463	0.2075	−0.2 (−7.5, 7.6)	0.9510	0.0374
	Boys	6.0 (−3.1, 16.1)	0.2020		−4.8 (−13.4, 4.5)	0.2999
	Girls	3.2 (−8.7, 16.7)	0.6146		5.2 (−6.7, 18.6)	0.4102

Models were adjusted for gender (boy or girl), parity (1st vs. other), mother’s education (high school or lower vs. more than high school), birth weight (kg), and use of plastic dishes in the microwave oven (yes or no). In addition, prenatal and postnatal BPA levels were mutually controlled for in the model

Abbreviations: K-SCQ Korean version of the Social Communication Questionnaire, BPA bisphenol A, CI confidence interval

^* P-value <0.05; ^# P-value <0.1