Table 4.

Geometric means^a for creatinine-adjusted (μg/g creatinine) phthalate metabolite concentrations by characteristics of the study population

	No. of samples	MEP	MnBP	MiBP	MBzP	MCPP	MEHP	MECPP	MEHHP	MEOHP	ΣDEHP
Age(μg/g creatinine)
19–29 b	25	40.7	24.9	7.5	20.5	1.7	4.8	36.6	26.4	18.6	83.7
30–39	36	59.2	25.8	7.0	20.0	1.6	2.7	28.5	17.9	12.0	60.7
≥ 40	31	91.5*	23.9	8.2	24.0	1.9	3.9	38.5	23.1	14.4	87.3
Body Mass Index (μg/g creatinine)
≤ 25 b	37	48.1	26.1	7.6	21.1	1.7	3.4	34.0	22.0	15.5	77.1
>25 to ≤ 30	33	72.3	27.3	7.4	27.4	1.9	4.9	43.2	28.7	18.3	98.9
>30	22	65.2	19.6	7.4	13.1	1.4	2.4	23.7	14.5	9.2**	51.1
Education (μg/g creatinine)
No formal educ	41	81.5	26.1	8.2	25.5	1.8	3.9	32.9	21.1	13.2	73.1
< HS	18	33.5**	26.1	6.7	16.0	1.1**	3.8	33.5	22.8	16.2	77.8
HS	17	48.4	24.5	7.7	24.1	1.8	3.0	29.8	19.0	13.0	67.1
>HS b	14	78.1	24.3	7.2	18.0	2.7	4.2	46.7	28.9	19.9	103.7
Income (μg/g creatinine)
<$24,999	48	58.1	28.7	7.5	22.9	1.8	3.1	28.7	17.7	11.8	63.4
$25,000–$39,999	29	78.4	23.4	8.3	18.0	2.0	5.0	54.2**	36.3**	23.3**	122.6**
$40,000–$59,999 b	12	37.7	18.6	6.2	25.6	1.1	4.0	27.5	18.4	12.5	63.2
Smoker in Home (μg/g creatinine)
Yes	17	36.5	22.4	5.8	21.2	1.6	2.9	25.2	15.4	9.8**	53.9**
No b	72	65.4	25.9	8.0	21.7	1.8	4.0	37.7	24.7	16.4	85.9
Season (μg/g creatinine)
Summer	31	50.7	27.9	8.2	20.2	1.7	3.9	29.1	21.1	13.9	70.5
Fall b	61	69.3	22.8	7.0	22.2	1.7	3.4	36.9	22.0	14.6	78.5

^aGeometric mean concentrations were calculated from the linear mixed model containing the variable of interest

^bReferent group

^*p-value < 0.05 from univariate mixed model

^**0.05 ≤ p ≤ 0.10 from univariate mixed model