高水碘摄入对成人空腹血糖影响的探讨

Impact of high water iodine intake on adult fasting blood-glucose

Objective:To investigate the blood glucose level in different iodine status, then explore the impact of excess-iodine-intake on fasting blood-glucose. Methods:Adults were chosen from Haixing County in Cangzhou, Hebei. Llimosis morning-urinary and venous blood were collected to measure the levels of urinary iodine. Chemilu-minescent immunoassay was used to perform free triiodothyronine (FT₃), free thyroxine (FT₄), and sensitive thyroid-stimulating hormone (sTSH) in serum. Fasting blood-glucose was also measured by glucometer. Results:The median of water iodine in the excess-iodine-intake area (841.4 μg/L) was higher than that in the control area (12.79 μg/L, P<0.05). For adults’ urine iodine, the excess-iodine-intake area was higher(P<0.05), with the value of 1 137.3（646.8～1 450.8）μg/L vs 216.6（146.5～366.9）μg/L. The level of FT₃ in the excess-iodine-intake area was lower (P<0.05), with the value of （4.72±0.48） pmol/L vs （4.96±0.36）pmol/L. No significant difference was found in the FT₄ level in the areas. The median of sTSH in the excess-iodine-intake area was higher than that in the control area, with the value of（3.07±2.17）μIU/ mL vs （2.30±1.07） μIU/mL . And the prevalence of thyroid disease in the excess-iodine-intake area was higher, with 43(22.75%) vs 8(10.13%). No significant difference in the level of the fasting blood-glucose was found in the areas (P>0.05). Age and FT₄ were found positively correlated with fasting blood-glucose by correlation analysis（r=0.258，P<0.001; r=0.154，P=0.013）, while the others were not related. Conclusion:Difference in fasting blood-glucose in water-iodine-excess area and the control area does not exist. Yet further study should be taken in a larger population-based epidemiological investigation to confirm the effects of excess-iodine-intake on glucose.