Table 6 Geometric mean by time of day.

From: Bisphenol A and phthalate metabolite urinary concentrations: Daily and across pregnancy variability

Metabolite

Time of day of urine sample a

No. samples

 

Midnight to 7:59

8:00 to 11:59

12:00 to 17:59

18:00–23:59

 
 

GM

P-valueb

GM

P-value

GM

P-value

GM

P-value

 

BPA

1.25

 

1.01

0.0655

1.37

0.1268

1.66

0.0003

1017

MBP

18.12

refc

16.55

0.0984

22.20

0.0076

20.37

0.0488

1029

MBzP

10.95

ref

8.53

0.0151

10.51

0.7531

9.97

0.5962

1029

MCPP

1.75

ref

1.02

0.0097

1.84

0.6851

3.18

0.0016

1029

MEHP

2.16

ref

1.64

0.0470

3.33

<0.0001

3.74

<0.0001

1029

MEHHP

13.02

ref

9.40

<0.0001

15.07

0.0052

17.53

<0.0001

1029

MEOHP

8.04

ref

5.91

<0.0001

9.16

0.0136

10.63

<0.0001

1029

MEP

32.51

ref

39.45

0.0015

35.09

0.0634

30.39

0.3122

1029

2OH-MIBP

4.81

ref

4.71

0.1937

4.69

0.3735

4.60

0.9773

542

MCMHP

3.39

ref

2.98

0.1898

2.44

0.0016

3.25

0.6757

542

MECPP

9.92

ref

8.48

0.0392

10.87

0.3440

13.14

0.0002

542

MHBP

1.29

ref

1.29

0.8911

1.97

0.0019

1.77

0.0165

542

MHiNP

1.83

ref

1.68

0.3969

2.26

0.2227

3.71

<0.0001

542

MOiDP

0.11

ref

0.10

0.3380

0.19

0.0109

0.24

0.0006

542

MiBP

8.17

ref

7.74

0.8837

7.34

0.3363

7.66

0.7312

542

  1. aSamples are both T1A and T1B visits (multiple spot urine samples over 24 hours).
  2. bTest for fixed effects using SG adjusted log-transformed metabolite levels in mixed models with random subject effects.
  3. cReference category.
Back to article page