Table 7 Intraclass coefficients (Part I data).

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

Urinary metabolite

Time period a

ICC (95% CI)

  

Unadjusted

SG adjusted

BPA

T1a (weekday)

0.31 (0.22, 0.42)

0.33 (0.24, 0.44)

 

T1b (weekend)

0.33 (0.23, 0.44)

0.31 (0.22, 0.43)

 

T2, T3, T5 only

0.06 (0.00, 0.56)

0.05 (0.00, 0.69)

 

Across all time points (SRSb)

0.11 (0.04, 0.26)

0.07 (0.02, 0.25)

MBP

T1a (weekday)

0.35 (0.25, 0.46)

0.44 (0.34, 0.55

 

T1b (weekend)

0.38 (0.28, 0.48)

0.38 (0.29, 0.49)

 

T2, T3, T5

0.30 (0.16, 0.47)

0.35 (0.21, 0.51)

 

Across all time points (SRSb)

0.30 (0.19, 0.42)

0.32 (0.21, 0.44)

MBzP

T1a (weekday)

0.60 (0.50, 0.69)

0.73 (0.65, 0.80)

 

T1b (weekend)

0.60 (0.51, 0.69)

0.70 (0.61, 0.77)

 

T2, T3, T5

0.23 (0.11, 0.43)

0.20 (0.08, 0.42)

 

Across all time points (SRSb)

0.24 (0.14, 0.37)

0.23 (0.13, 0.36)

MCPP

T1a (weekday)

0.21 (0.14, 0.32)

0.21 (0.13, 0.31)

 

T1b (weekend)

0.36 (0.26, 0.47)

0.31 (0.22, 0.42)

 

T2, T3, T5

0.23 (0.10, 0.46)

0.21 (0.08, 0.45)

 

Across all time points (SRSb)

0.21 (0.11, 0.36)

0.19 (0.10, 0.35)

MEHHP

T1a (weekday)

0.34 (0.25, 0.45)

0.42 (0.32, 0.53)

 

T1b (weekend)

0.30 (0.21, 0.41)

0.30 (0.21, 0.41)

 

T2, T3, T5

0.25 (0.12, 0.43)

0.18 (0.07, 0.39)

 

Across all time points (SRSb)

0.18 (0.10, 0.32)

0.15 (0.07, 0.29)

MEHP

T1a (weekday)

0.28 (0.19, 0.38)

0.27 (0.18, 0.37)

 

T1b (weekend)

0.39 (0.29, 0.50)

0.41 (0.31, 0.52)

 

T2, T3, T5

0.32 (0.18, 0.50)

0.23 (0.11, 0.44)

 

Across all time points (SRSb)

0.16 (0.08, 0.29)

0.12 (0.05, 0.26)

MEOHP

T1a (weekday)

0.33 (0.24, 0.44)

0.39 (0.29, 0.50)

 

T1b (weekend)

0.29 (0.20, 0.40)

0.30 (0.20, 0.40)

 

T2, T3, T5

0.27 (0.15, 0.45)

0.21 (0.10, 0.41)

 

Across all time points (SRSb)

0.22 (0.13, 0.35)

0.20 (0.11. 0.33)

MEP

T1a (weekday)

0.66 (0.57, 0.75)

0.76 (0.69, 0.83)

 

T1b (weekend)

0.68 (0.59, 0.76)

0.78 (0.71, 0.84)

 

T2, T3, T5

0.34 (0.20, 0.51)

0.33 (0.20, 0.50)

 

Across all time points (SRSb)

0.38 (0.27, 0.51)

0.38 (0.27, 0.50)

  1. aAcross all time points; throughout pregnancy and up to 3 months postpartum.
  2. bSRS- a simple random sample to select one sample from T1a and T1b.