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Table 2 Thyroid hormone levels in Michigan PBB Registry

From: Thyroid hormone levels associate with exposure to polychlorinated biphenyls and polybrominated biphenyls in adults exposed as children

 

Total Cohort

Exposed before pubertyc

Exposed after pubertyd

P-value

Total T4a (μ g/dL)

9.06 (1.20)

9.02 (1.20)

9.12 (1.21)

0.46

Total T3 a (ng/mL)

1.01 (1.26)

1.06 (1.25)

0.94 (1.24)

1.64e-10

Free T4 a (ng/dL)

0.78 (1.19)

0.77 (1.18)

0.80 (1.21)

5.09e-03

Free T3 a (pg/mL)

3.16 (1.16)

3.22 (1.16)

3.07 (1.15)

1.98e-05

TSH a (μ IU/mL)

1.60 (1.97)

1.55 (1.93)

1.67 (2.03)

0.15

Free T3: Free T4b

4.12 ± 0.90

4.26 ± 0.91

3.90 ± 0.85

1.41e-07

  1. aGeometric mean and geometric standard error
  2. bMean and standard deviation
  3. cExposed to PBB before finishing puberty (Age of exposure <= 16)
  4. dExposed to PBB after finishing puberty (Age of exposure > 16)