Iodine Status in Pregnant Women Having Urinary Fluoride in Contaminated Areas: A Case Study of Phayao Province

Table 10

The range, frequency, and interpretation of pregnant women’s serum FT3 (N = 152).

Ranges of serum FT3	N (%)	Interpretation
Serum FT3 between 2.00 and 4.40 pg/ml	58 (38.16)	Normal
Serum FT3 > 440	94 (61.84)	High intake of iodine

Mean = 5.10 μg/L, geometric mean = 4.88 μg/L, median 4.72, and minimum to maximum: 3.56–21.17 μg/L. Subject FT3 levels from 2.5th to 97.5th percentiles: 3.82–13.82 μg/L. , the range of serum FT3 based on [23]. The range of serum FT3 between 2.00 and 4.40 pg/L is normal. The range of serum FT3 more than 4.40 pg/L may be a sign of an overactive thyroid gland (hyperthyroidism).