Establishment and application of women thyroid function indicators reference interval during pregnancy in Fujian Province / 中华地方病学杂志

ABSTRACT

Objective Using Beckman assay kit to establish women thyroid function indicators reference interval during pregnancy in Fujian Province.Methods Two iodine sufficient areas were selected in Fujian randomly,and the women who did pregnancy test in local hospital were investigated.A questionnaire study and physical examination were conducted and women's serum samples were collected to detect the thyroid function [thyroid stimulating hormone (TSH),free triiodothyronine (FT3),free thyroxine (FT4),total triiodothyronine (TT3),and total thyroxine (TT4)] using Beckman chemiluminescence analyzer access-2 and assay kit.Reference interval was shown with median (M) and P2.5-P97.5.At the same time,the newly established reference interval was used to evaluate the thyroid function of 830 pregnant women.Result A total of 455 pregnant women were detected (early,middle and late pregnancies were 146,157 and 152,respectively).Most of the thyroid function indexes presented skewed distribution.The thyroid function index reference intervals in early,middle and late pregnancies were TSH0.80 (0.02-2.96),1.13 (0.07-3.56),1.18 (0.09-3.76) mU/L;FT34.28 (3.30-5.76),3.74 (2.78-4.83),3.63 (2.81-4.56) pmol/L;FT411.78 (8.66-19.68),9.34 (7.03-12.76),8.55 (6.20-11.73) pmol/L;TT31.91 (1.09-2.95),2.00 (0.90-2.96),1.98 (0.91-3.02) nmol/L;and T4123.00 (79.62-194.85),115.42 (58.78-175.85),117.43 (58.29-192.00) nmol/L.The thyroid dysfunction rate diag,nosed by our reference interval was 22.0％ (183/830),whilch was lower than 28.0％ (232/830) diagnosed by American Thyroid Association (ATA) reference interval (x2 =7.714,P ＜ 0.05).Conclusions Women thyroid function indicators reference interval during pregnancy in Fujian Province is successfully established.The study shows that each area and laboratory should establish the thyroid hormone reference interval of pregnant women for diagnosis and treatment of thyroid disease.