How many cases of Hypothyroidism are there each year in the US?

March 8, 2024

Estimating the exact number of new cases of hypothyroidism diagnosed each year in the United States is challenging due to variations in reporting practices and diagnostic criteria. Hypothyroidism is a common endocrine disorder characterized by an underactive thyroid gland, which fails to produce enough thyroid hormone to meet the body’s needs.

However, data from various sources, including the American Thyroid Association (ATA) and the National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK), suggest that hypothyroidism is prevalent in the United States:

  1. Prevalence: It is estimated that approximately 4.6% of the U.S. population aged 12 and older have hypothyroidism. This equates to millions of individuals affected by the condition.
  2. Risk Factors: Risk factors for hypothyroidism include autoimmune diseases (such as Hashimoto’s thyroiditis), iodine deficiency, radiation therapy to the head and neck, certain medications (such as lithium and amiodarone), and thyroid surgery.
  3. Impact: Hypothyroidism can have a significant impact on overall health and well-being if left untreated. Common symptoms include fatigue, weight gain, cold intolerance, dry skin, hair loss, constipation, depression, and menstrual irregularities in women.
  4. Diagnosis: Diagnosis of hypothyroidism typically involves blood tests to measure levels of thyroid-stimulating hormone (TSH) and thyroid hormones (T4 and T3). Additional tests, such as thyroid antibody tests, may be performed to identify autoimmune thyroid disorders.
  5. Treatment: Treatment for hypothyroidism usually involves lifelong thyroid hormone replacement therapy with synthetic thyroid hormones, such as levothyroxine. The goal of treatment is to restore thyroid hormone levels to normal and alleviate symptoms.

Given the prevalence and impact of hypothyroidism in the United States, efforts to raise awareness, promote early detection, and ensure access to appropriate treatment are important. Individuals who experience symptoms of hypothyroidism should consult a healthcare professional for evaluation and management. Early diagnosis and treatment can help improve symptoms, prevent complications, and optimize overall health outcomes.