Table 4

Concentration of thyroid indices if urinary iodine concentration (UIC) <50 μg/L or ≥50 μg/L and <100 μg/L or ≥100 μg/L
Tg (μg/L) P TSH (mU/L) P Free T4 (pmol/L) P Free T3 (pmol/L) P
Mean (95% Cl) Mean (95% Cl) Mean (95% Cl) Mean (95% Cl)
UIC < 50 (μg/L) 15.6 (14.0,17.3) 0.001 1.7 (1.6, 1.9) 0.669 14.7 (14.3,15.2) 0.271 6.1 (6.0,6.2) 0.002
UIC ≥ 50 (μg/L) 12.3 (11.1, 13.5) 1.7 (1.6, 1.8) 15.0 (14.6, 15.3) 5.9 (5.8, 6.0)
UIC < 100 (μg/L) 13.9 (12.8, 14.9) 0.000 1.7 (1.6, 1.8) 0.236 14.9 (14.5, 15.2) 0.630 6.0 (6.0, 6.1) 0.001
UIC ≥ 100 (μg/L) 10.3 (8.8, 12.1) 1.8 (1.6,1.9) 15.0 (14.5, 15.5) 5.9 (5.8, 6.0)

Tg and TSH values presented as geometric mean (95% Confidence Interval) and free T4 and T3 values presented as mean (95% Confidence Interval) as determined by regression analysis. Values of 50 μg/L and 100 μg/L based on ICCIDD/UNICEF/WHO [7] recommended cut-offs for UIC. Thyroglobulin = Tg.

Skeaff et al.

Skeaff et al. Nutrition Journal 2012 11:31   doi:10.1186/1475-2891-11-31

Open Data