- Serum TSH, T4, and Thyroid Antibodies in the United States Population (1988 to 1994): National Health and Nutrition Examination Survey (NHANES III)
- Whickham Survey: vervolg na 20 jaar
- Thyroid disease: thyroid function tests and interpretation
- Thyroid-Stimulating Hormone - Why efforts to harmonize testing are critical to patient care
In addition, TSH is secreted from the pituitary in a periodic, diurnal manner, with TSH levels generally higher in the morning and lower in the late afternoon and evening hours. Thus, a single TSH measurement may not provide an accurate representation of a patient’s TSH range. Repeat TSH testing should be carried out consistently, with measurements taken at the same time of day, in order to determine an individual’s TSH range and to properly diagnose thyroid dysfunction.