Objective:To contrast the levels of serum TT3 and TT4 between healthy Han and Bai people and to establish the local normal value of TT3 and TT4 in Dali.
Serum thyroid stimulating hormone (TSH), free triiodothyronine (FT3) and free tetraiodothyronine (FT4) levels were detected after operation or 2, 3 and 4 weeks after drug withdrawl.
The levels of serum free Triiodothyronine (FT3) and free Thyroxine (FT4) with thyroid-stimulating hormone (TSH) were measured by CLIA and RIA methods respectively.