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Serum TSH, T 4 , and Thyroid Antibodies in the United States Population (1988 to 1994): National Health and Nutrition Examination Survey (NHANES III)

Hollowell, Joseph G., Staehling, Norman W., Flanders, W. Dana, Hannon, W. Harry, Gunter, Elaine W., Spencer, Carole A., Braverman, Lewis E.·2002·The Journal of Clinical Endocrinology & Metabolism

Abstract

NHANES III measured serum TSH, total serum T4, antithyroperoxidase (TPOAb), and antithyroglobulin (TgAb) antibodies from a sample of 17,353 people aged ≥12 yr representing the geographic and ethnic distribution of the U.S. population. These data provide a reference for other studies of these analytes in the U.S. For the 16,533 people who did not report thyroid disease, goiter, or taking thyroid medications (disease-free population), we determined mean concentrations of TSH, T4, TgAb, and TPOAb. A reference population of 13,344 people was selected from the disease-free population by excluding, in addition, those who were pregnant, taking androgens or estrogens, who had thyroid antibodies, or biochemical hypothyroidism or hyperthyroidism. The influence of demographics on TSH, T4, and antibodies was examined. Hypothyroidism was found in 4.6% of the U.S. population (0.3% clinical and 4.3% subclinical) and hyperthyroidism in 1.3% (0.5% clinical and 0.7% subclinical). (Subclinical hypothyroidism is used in this paper to mean mild hypothyroidism, the term now preferred by the American Thyroid Association for the laboratory findings described.) For the disease-free population, mean serum TSH was 1.50 (95% confidence interval, 1.46–1.54) mIU/liter, was higher in females than males, and higher in white non-Hispanics (whites) [1.57 (1.52–1.62) mIU/liter] than black non-Hispanics (blacks) [1.18 (1.14–1.21) mIU/liter] (P < 0.001) or Mexican Americans [1.43 (1.40–1.46) mIU/liter] (P < 0.001). TgAb were positive in 10.4 ± 0.5% and TPOAb, in 11.3 ± 0.4%; positive antibodies were more prevalent in women than men, increased with age, and TPOAb were less prevalent in blacks (4.5 ± 0.3%) than in whites (12.3 ± 0.5%) (P < 0.001). TPOAb were significantly associated with hypo or hyperthyroidism, but TgAb were not. Using the reference population, geometric mean TSH was 1.40 ± 0.02 mIU/liter and increased with age, and was significantly lower in blacks (1.18 ± 0.02 mIU/liter) than whites (1.45 ± 0.02 mIU/liter) (P < 0.001) and Mexican Americans (1.37 ± 0.02 mIU/liter) (P < 0.001). Arithmetic mean total T4 was 112.3 ± 0.7 nmol/liter in the disease-free population and was consistently higher among Mexican Americans in all populations. In the reference population, mean total T4 in Mexican Americans was (116.3 ± 0.7 nmol/liter), significantly higher than whites (110.0 ± 0.8 nmol/liter) or blacks (109.4 ± 0.8 nmol/liter) (P < 0.0001). The difference persisted in all age groups. In summary, TSH and the prevalence of antithyroid antibodies are greater in females, increase with age, and are greater in whites and Mexican Americans than in blacks. TgAb alone in the absence of TPOAb is not significantly associated with thyroid disease. The lower prevalence of thyroid antibodies and lower TSH concentrations in blacks need more research to relate these findings to clinical status. A large proportion of the U.S. population unknowingly have laboratory evidence of thyroid disease, which supports the usefulness of screening for early detection.

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Crossref · 10.1210/jcem.87.2.8182

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  • Higher serum TSH values might occur naturally as part of the ageing process.

    “Although higher serum TSH values might occur naturally, as part of the ageing process, [15][16][17]”

    From Hypothyroidism (2024) · cites this paper as [15]

  • The NHANES III study identified that the overall prevalence of hypothyroidism was 4.6%.

    “although the NHANES III study identified that the overall prevalence of hypothyroidism was 4•6%.15”

    From Hypothyroidism (2024) · cites this paper as [15]

  • The prevalence of hypothyroidism was markedly lower in individuals of African Caribbean descent (1.7%).

    “The prevalence was markedly lower in individuals of African Caribbean descent (1•7%).15”

    From Hypothyroidism (2024) · cites this paper as [15]

  • The distribution of serum TSH reference interval is right-shifted with age, giving an upper 97.5% confidence interval of around 7.5 mU/L in healthy elderly people.

    “the distribution of serum TSH reference interval is right -shifted with age, 24 -26 giving an upper 97.5% confidence interval of around 7.5 mU/L in healthy elderly people. 2,3”
  • The shift in the normal TSH distribution to a higher range in older individuals might represent a normal part of ageing.

    “This shift in the normal TSH distribution to a higher range in older individuals might represent a normal part of ageing,15-17,131”

    From Hypothyroidism (2024) · cites this paper as [15]

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Authors
Hollowell, J. G., Staehling, N. W., Flanders, W. D., Hannon, W. H., Gunter, E. W., Spencer, C. A., & Braverman, L. E.
Affiliations
  • National Center for Environmental Health (US)
  • Emory University (US)
  • University of Southern California (US)
  • Boston Medical Center (US)
Corresponding author
Hollowell, Joseph G.
Venue
The Journal of Clinical Endocrinology & Metabolism
Published
2002-02
Volume
87
Issue
2
Pages
489-499
ISSN
  • 0021-972X (ISSN-L)
  • 1945-7197
OpenAlex
W1984273763
Cited by
4,279
References
41
Citations by year
2026: 114 · 2025: 159 · 2024: 207 · 2023: 257 · 2022: 267 · 2021: 237 · 2020: 246 · 2019: 224 · 2018: 235 · 2017: 264 · 2016: 245 · 2015: 211 · 2014: 191 · 2013: 224 · 2012: 188
FWCI
38.19
Type
journal article
Language
en
Open access
closed
Locations
  • The Journal of Clinical Endocrinology & Metabolism (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Disorders and Treatments
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Cancer Diagnosis and Treatment
  • Health Sciences › Medicine › Surgery › Thyroid and Parathyroid Surgery
Keywords
thyroid-stimulating hormone, serum thyroxine, thyroid peroxidase antibodies, thyroglobulin antibodies, thyroid autoantibodies, subclinical hypothyroidism, subclinical hyperthyroidism, reference values, sex differences, age differences, racial and ethnic differences, NHANES III, United States
MeSH terms
Adolescent, Adult, Aged, Aged, 80 and over, Autoantibodies, Black or African American, Demography, Female, Humans, Iodide Peroxidase, Iodine, Male, Middle Aged, Nutrition Surveys, Thyroglobulin, Thyrotropin, Thyroxine, Mexican Americans, White People

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