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Figure 1

(A) Chromatogram of blank urine; (B) phthalate-spiked blank urine (MMP and MBP at 250 ng/mL); and (C) representative urine sample containing MMP and MBP. MBP, mono-n-butyl phthalate; MMP, monomethyl phthalate
(A) Chromatogram of blank urine; (B) phthalate-spiked blank urine (MMP and MBP at 250 ng/mL); and (C) representative urine sample containing MMP and MBP. MBP, mono-n-butyl phthalate; MMP, monomethyl phthalate

Beta coefficient of Cr-adjusted urinary MMP and MBP concentrations (μg/g of Cr) according to Tanner stage adjusted by sex

CharacteristicsAdjusted urinary MMP

Adjusted by sex; P < 0.05 indicates significance

(μg/g of Creatinine)
Adjusted urinary MMP

Adjusted by sex; P < 0.05 indicates significance

(μg/g of Creatinine)
Beta coefficientSEPBeta coefficientSEP
Tanner stage−303.76260.010.24−200.1485.410.02

Literature review of studies of urinary phthalate metabolite levels

StudyPopulationAge (y)MethodMMP (μg/g Cr)DRMBP (μg/g Cr)DR
Guo Y [34]Chinese21–49HPLC/MS9.750%69.5>97% in
Indian5.8>95%14.9all
Japanese11.1>95%11.5
Korean2.750%19.8
KuwaitiUndetectable50%78.7
MalaysianUndetectable33%15.1
VietnameseUndetectable50%14.1
Guo C [31]Chinese18–22HPLC/MS12.299.1%74100%
Casas et al. [32]Spain4HPLC/MSNot doneNot done30.2Not done
Silva et al. [33]USA6–11HPLC/MSNot doneNot done38.9Not done
Mouritsen et al. [36]Denmark5.9–12.8LC/MSNot doneNot done11.2 ng/mL (not corrected with Cr)Not done
Bertelsen et al. [37]Norway10HPLC/MSNot doneNot done138.8 ng/mL (not corrected with Cr)Not done
Present studyThailand2–18HPLC028.5%25288.6%

Detection rate of phthalate metabolites

MMPMBP
n (%)63 (28.5)196 (88.6)
Mean ± SD (μg/g of Cr)1937.95 ± 4754.27657.97 ± 1459.75
GM (95% CI) (μg/g of Cr)3400 (2489.9–4642.8)214.4 (164.6–279.1)
Median (μg/g of Cr)0252

Sociodemographic characteristics of the study population (N = 221)

Characteristicn (%)
Sex
 Male103 (45.9)
 Female118 (54.0)
Age (y), mean ± SD9.4 ± 3.64
  < 644 (19.9)
 6–11129 (58.3)
 12–1848 (21.7)
Family income (EUR/mo)
 <€52645 (20.4)
 €526–€105268 (30.7)
 >€1052108 (48.8)
Education of parents
 None2 (0.9)
 Elementary26 (11.7)
 High school29 (13.0)
 Vocational certificate36 (16.1)
 Bachelor of Arts and higher128 (57.9)
Pubertal staging
 Prepuberty130 (58.8)
 Puberty71 (32.1)
 Uncertain20 (9.0)
Media exposure
 <1 h35 (15.8)
 1–2 h76 (34.3)
 >2 h110 (49.7)

Phthalate metabolite values expressed as mean ± SD and median (IQR) (μg/g of Creatinine) by source of exposure

Source of exposurenMMPMBP
Mean ± SDMedian (IQR)PMean ± SDMedian (IQR)P
ShampooNo391573.5 ± 3705.80 (0, 533)0.88762.3 ± 1567.1256.1 (47.9, 633.6)0.78
Yes1651701.2 ± 4784.80 (0, 459.8)685.8 ± 1530.6200.4 (20.7, 440.9)
Hair conditionerNo1211616.6 ± 4682.90 (0, 528.9)0.82633.2 ± 1417.2238.4 (47.9, 522.2)0.45
Yes831764.5 ± 4478.10 (0, 459.8)798.4 ± 1694.2160.4 (7.3, 548.4)
Hair spray/hair gelNo1871774.8 ± 4757.40 (0, 619.9)0.31743 ± 1594.6212.1 (18, 540.3)0.19
Yes17598.3 ± 1689.20 (0, 0)232.5 ± 211.3196.1 (91.6, 281.5)
ToothpasteNo53688.8 ± 4423.41054.4 (533, 7238.1)0.32693.4 ± 761.1256.1 (206, 1063.3)0.99
Yes1991626.3 ± 4593.60 (0, 438.1)700.6 ± 1549.5206.9 (18, 523.6)
MouthwashNo1621639.8 ± 4510.50 (0, 533)0.82681.3 ± 1516.8212.8 (61.9, 523.6)0.73
Yes421819.5 ± 4939.80 (0, 438.1)774.1 ± 1615.5177.6 (0, 579.1)
Shaving creamNo2001710.3 ± 4629.80 (0, 531)0.46712.2 ± 1547212.8 (25.3, 529.2)0.44
Yes40 ± 00 (0, 0)110.4 ± 83.9128.2 (45.8, 175)
PerfumeNo1821815.8 ± 4822.90 (0, 533)0.21725.2 ± 1584.6212.8 (43.4, 530.5)0.51
Yes22527.2 ± 1276.90 (0, 0)495.6 ± 1027.7153.8 (9.1, 336.2)
SoapNo83107.9 ± 6036.6222.7 (0, 3849)0.37649.8 ± 1157.537.9 (0, 896.4)0.92
Yes1961618.4 ± 4531.90 (0, 483.5)702.5 ± 1549.7210.7 (45.7, 522.9)
LotionNo971313.6 ± 3350.90 (0, 43)0.28703.9 ± 1448.2209.3 (61.9, 559.9)0.98
Yes1072006.1 ± 5472.60 (0, 925.4)697.3 ± 1614.8200.4 (9.1, 440.9)
CosmeticsNo1671669.3 ± 45470 (0, 533)0.96657.1 ± 1469.9212.1 (47.9, 522.2)0.39
Yes371710.8 ± 4844.40 (0, 445.3)895.8 ± 1805.3200.4 (6.2, 694.9)
SunscreenNo1601706.1 ± 4590.90 (0, 772.7)0.90691.6 ± 1522.3216.5 (58.6, 529.2)0.84
Yes431606.7 ± 46870 (0, 0)746 ± 1609.9196.1 (2.9, 514.2)
DeodorantNo1481901.8 ± 4825.50 (0, 1015.9)0.26726.7 ± 1564.3226.2 (70.3, 554.2)0.69
Yes561082.3 ± 3877.10 (0, 0)630.8 ± 1462.5153.2 (5.9, 316.6)
Leather polishNo1941652 ± 4499.40 (0, 528.9)0.74679.1 ± 1501.9208.1 (10.1, 527.9)0.38
Yes102157.3 ± 6388.60 (0, 204)1114.5 ± 2122.5217 (100.3, 418.4)
Floor cleaning liquidNo1591258.8 ± 2968.80 (0, 528.9)0.014

P < 0.05 (independent t test).

625 ± 1386.9206.9 (43.4, 522.2)0.19
Yes453153.9 ± 7917.90 (0, 382.1)967.1 ± 1963.8219.8 (6.2, 579.1)
Washing powderNo1241213.5 ± 2836.30 (0, 494.4)0.07629.7 ± 1423.6206.2 (8.2, 479.5)0.41
Yes802394.9 ± 63840 (0, 529)810.1 ± 1694.6242.8 (70.3, 674)
Dish washing soapNo961242.1 ± 3027.90 (0, 366.5)0.20637.6 ± 1445.6208.1 (8.2, 522.9)0.58
Yes1082063.2 ± 5613.50 (0, 496.4)756.3 ± 1613.3209 (70.3, 563.7)
Vinyl productsNo1331666.1 ± 4582.40 (0, 459.8)0.91737.2 ± 1598.1232.4 (29.9, 559.9)0.70
Yes691746 ± 4695.40 (0, 533)647.5 ± 1432.1193.8 (43.4, 440.9)
PaintsNo1961512 ± 3876.70 (0, 452.6)0.011

P < 0.05 (independent t test).

640.4 ± 1389.1206.7 (25.3, 518.2)0.005

P < 0.05 (independent t test).

Yes85714.5 ± 13151.40 (0, 4023.9)2170.1 ± 3452.7436.2 (63.6, 3792.1)
InsecticideNo1901521.5 ± 4151.90 (0, 459.8)0.08656.8 ± 1472.2206.2 (20.7, 523.6)0.14
Yes143784.2 ± 8558.20 (0, 809.8)1292.6 ± 2198.4307.9 (100.3, 764.6)
MothballsNo2001684.5 ± 4624.80 (0, 494.4)0.87709.5 ± 1547.4210.7 (25.3, 525.7)0.55
Yes41289.6 ± 2579.20 (0, 2579.2)248.7 ± 348.4115.2 (50.1, 447.3)
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Medicine, Assistive Professions, Nursing, Basic Medical Science, other, Clinical Medicine