Study on the Relationship Between Iodine Nutrition and Thyroid Diseases in the Elderly

The aging trend of China's population is intensifying. More than 50% of the elderly in China suffer from thyroid disease. Thyroid dysfunction in the elderly increases the risk of cardiovascular and metabolic diseases. Even if thyroid-stimulating hormone (TSH) is within the normal range, brain atrophy and infarction-like vascular damage in elderly males will be aggravated with the increased TSH level. Iodine is an essential component of thyroid hormones. Iodine deficiency or excess may lead to a series of thyroid diseases. The risk threshold of iodine intake in the elderly is unknown. The goal of this observational study is to clarify the relationship between thyroid diseases and iodine intake in the elderly. The aims are:to clarify the differences in the prevalence of thyroid diseases in the elderly with different iodine nutrition backgrounds.to analyze the effects of mild iodine deficiency and iodine excess on the thyroid health of the elderly.to explore the hazard threshold of iodine intake for old people.to compare the differences in thyroid disease and iodine nutritional status between young and middle-aged people and old people.

Inclusion Criteria:1. adults with at least 5 years of local residence;Exclusion Criteria:adults with family genetic diseasesadults with special dietary habitsadults taking iodine-containing drugs or supplementsadults with protein or nutritional deficiencies