Iodine Nutrition Status and Clinical Characteristics of Thyroid Cancer

Prospective Cohort Study on Clinical Characteristics of Thyroid Cancer in Different Iodine Status Areas

The effect of iodine nutritional status on thyroid cancer has been controversial for many years. We designed a prospective cohort study that recruiting patients in different iodine areas who underwent thyroid cancer surgery in branch hospitals from 2012 to 2019，and follow up their clinical outcomes. We aimed to analyse the relationship between regional iodine nutrition level and pathological types, clinical features, and prognosis of thyroid cancer.

Three sub centers were selected in high iodine (Jining/Liaocheng/Heze) and moderate iodine (Jinan/Shenyang/Haerbin) areas respectively. Patients lived in the above-mentioned regions for at least 5 years and diagnosed as thyroid cancer and underwent thyroid surgery in branch hospitals from 2012 to 2019 were recruited.

Inclusion Criteria:

1. Age range: 18~65 years old, gender not limited;
2. Living in the selected region for at least 5 years;
3. Patients who underwent thyroid surgery at various research centers were pathologically diagnosed with thyroid cancer;
4. The clinical data （general information、surgical scope 、pathological report、utrasonic report, etc ）of the case is complete.

Exclusion Criteria:

1. Diagnosed as other types of cancer or thyroid metastatic cancer;
2. There are serious comorbidities such as heart, liver, and kidney diseases present;
3. Unable to follow up on prognostic information.