Table 4.

Crude and adjusted odds ratios of current asthma per concentration quartile and per log10 IQR increase in ΣDEHP, Σlow-MWP, and Σhigh-MWP.

Phthalate metabolite sum	Concentration (µmol/L)	Noncases (n)	Cases (n)	OR (95% CI)	aORa (95% CI)
ΣDEHPb In quartiles	≤ 0.50 (ref)	123	31	1	1
	> 0.50–0.79	129	27	0.90 (0.50, 1.6)	1.1 (0.65, 1.9)
	> 0.79–1.23	122	34	1.3 (0.69, 2.3)	1.4 (0.75, 2.6)
	> 1.23	120	36	1.4 (0.75, 2.7)	1.6 (0.83, 3.2)
ΣDEHP per log10 IQR		494	128	0.96 (0.73, 1.3)	0.99 (0.75, 1.3)
Σlow-MWPc in quartiles	≤ 0.85 (ref)	121	34	1	1
	> 0.85–1.26	126	28	0.81 (0.46, 1.4)	0.83 (0.46, 1.5)
	> 1.26–1.97	121	35	1.1 (0.60, 1.9)	1.3 (0.71, 2.3)
	> 1.97	125	31	0.92 (0.51, 1.7)	0.95 (0.51, 1.8)
Σlow-MWP per log10 IQR		494	128	0.98 (0.76, 1.3)	1.0 (0.77, 1.3)
Σhigh-MWPd in quartiles	≤ 0.66 (ref)	125	29	1	1
	> 0.66–1.0	126	29	1.1 (0.61, 2.0)	1.2 (0.65, 2.2)
	> 1.0–1.56	123	32	1.3 (0.72, 2.5)	1.4 (0.72, 2.6)
	> 1.56	118	38	1.8 (0.92, 3.4)	1,8 (0.92, 3.6)
Σhigh-MWP per log10 IQR		494	128	1.0 (0.76, 1.3)	1.0 (0.77, 1.4)
Abbreviations: IQR, interquartile range; ref, reference. aAdjusted for urine SG, sex, parental asthma, and household income. b∑DEHP: MEHP, MECPP, MEHHP, and MEOHP. c∑Low-MWP: MEP, MnBP, and MiBP. d∑High-MWP: MBzP, MCNP, MCOP, MCPP, MEHP, MECPP, MEHHP, and MEOHP.