Table 3 Relationship between serum thyroid profiles and di-(2-ethylhexyl) phthalate (DEHP) intake estimated by questionnaire and DEHP estimates by creatinine excretion-based model in multivariate linear regression models after multiple imputation.

	Crude					Adjusted Model ¹
	N	β	SE	P	P*	β	SE	P	P*
T3
Daily DEHP intake (DDI) estimated by questionnaire	250	0.07	0.03	0.01	0.04	0.04	0.03	0.11	0.23
DEHP intake estimated by creatinine excretion-based model ²	240	0.15	0.32	0.64	0.64	0.05	0.29	0.86	0.86
T4
Daily DEHP intake (DDI) estimated by questionnaire	250	0.001	0.002	0.65	0.76	−0.002	0.002	0.38	0.51
DEHP intake estimated by creatinine excretion-based model ²	240	−0.01	0.02	0.64	0.64	−0.02	0.02	0.27	0.54
FT4
Daily DEHP intake (DDI) estimated by questionnaire	250	0.00005	0	0.76	0.76	0.00006	0	0.72	0.72
DEHP intake estimated by creatinine excretion-based model ²	240	0.002	0.002	0.39	0.64	0.001	0.002	0.46	0.61
TSH
Daily DEHP intake (DDI) estimated by questionnaire	250	0.003	0.001	0.04	0.07	0.002	0.001	0.09	0.23
DEHP intake estimated by creatinine excretion-based model ²	240	0.04	0.02	0.01	0.04	0.04	0.02	0.02	0.08

Abbreviations: BMI = body mass index; DDI = daily DEHP intake; DEHP = di-(2-ethylhexyl) phthalate; FT4 = free thyroxine; T3 = triiodothyronine; T4 = thyroxine; TSH = thyroid-stimulating hormone.
^*Benjamini-Hochberg adjusted P values.
¹Adjusting for age, gender, BMI.
²Ten missing data.

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