Table 2.

Association of creatinine-corrected prenatal urinary concentrations of phthalate biomarkers on the infant MDI and the psychomotor index of the BSID-II at 6 months.

All cases (n = 417)									Subgroup with maternal intelligence (n = 227)
Model 1				Model 2				Model 1				Model 2
Biomarkersa	βb (95% CI)		p-Value	βb (95% CI)		p-Value	βb (95% CI)		p-Value	βb (95% CI)		p-Value
MDI
MEHHP		–1.14	(–2.01 to –0.26)		0.01		–0.97	(–1.85 to –0.08)		0.03		–1.48	(–2.73 to –0.22)		0.02		–1.45	(–2.72 to –0.17)		0.03
MEOHP		–1.13	(–2.04 to –0.23)		0.01		–0.95	(–1.87 to –0.03)		0.04		–1.56	(–2.85 to –0.27)		0.02		–1.54	(–2.85 to –0.23)		0.02
HHP + OHP		–1.12	(–2.03 to –0.21)		0.02		–0.98	(–1.90 to –0.06)		0.04		–1.47	(–2.76 to –0.19)		0.03		–1.15	(–2.45 to 0.15)		0.08
MBP		–0.58	(–1.22 to 0.07)		0.08		–0.54	(–1.18 to 0.10)		0.10		–0.73	(–1.58 to 1.13)		0.10		–0.64	(–1.51 to 0.23)		0.15
PDI
MEHHP		–1.31	(–2.45 to –0.17)		0.03		–1.20	(–2.33 to –0.08)		0.04		–2.00	(–3.52 to –0.47)		0.01		–1.88	(–3.40 to –0.36)		0.02
MEOHP		–1.01	(–2.19 to 0.17)		0.09		–0.92	(–2.10 to 0.26)		0.13		–2.03	(–3.60 to –0.46)		0.01		–1.88	(–3.44 to –0.32)		0.02
HHP + OHP		–1.23	(–2.41 to –0.05)		0.04		–1.48	(–3.04 to 0.07)		0.06		–2.03	(–3.57 to –0.49)		0.01		–1.51	(–3.06 to 0.04)		0.06
MBP		–0.77	(–1.61 to 0.06)		0.07		–0.79	(–1.60 to 0.03)		0.06		–1.06	(–2.10 to 2.10)		0.05		–1.07	(–2.10 to –0.03)		0.04
Model 1: unadjusted. Model 2: adjusted for infant birth weight, infant sex, maternal age, maternal education level, family income, breast-feeding status, and residential area (plus maternal intelligence for subgroup analysis). aPrenatal maternal urinary concentrations were natural log-transformed. Urine samples with creatinine values > 20 mg/dL were used. bMDI or PDI scores per natural log change in micrograms per gram creatinine.