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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)