Lodine nutrition level and ultrasonic manifestations of thyroid in forest and non-forest residents of Heilongjiang province / 中国医学影像技术

ABSTRACT

Objective: To observe the iodine nutrition level and ultrasonic manifestations of thyroid in forest and non-forest land residents of Heilongjiang province. Methods: Using random sampling method, 3 645 residents form 13 forests and 17 non-forests sites were selected and divided into 5 groups according to ages, i.e. group A (20-30 years), B (31-40 years), C (41-50 years), D (51-60 years) and E (61-70 years), and the ratio of male and female in each group was 11. Then all objects underwent thyroid ultrasound and urinary iodine. Results: ①The median urinary iodine of forest residents was lower than non-forest residents (P0.05). Thyroid structure abnormal rate of group D and E in forest residents were both higher than those in non-forest (both P<0.05). ③The urine iodine median in forest residents with ultrasonic abnormal thyroid was lower than in non-forest (P<0.05), while in forest residents in group D and E were both lower than non-forest (both P<0.05). Conclusion: The rate of thyroid structure abnormality increased with aging in both forest and non-forest residents of Heilongjiang province, the thyroid structure abnormal rate in middle-aged and elderly forest residents was higher, whereas the urine iodine median was lower than non-forest. Iodine nutritional status were at adequate levels in forest and non-forest 20-29 years old residents, while at appropriate levels in all other ages. The urine iodine content in forest residents were lower than that in non-forest of the same ages.