Thyroid Autoantibodies in Hospitalized Chronic Geriatric Patients: Prevalence, Effects of Age, Nonthyroidal Clinical State, and Thyroid Function

István Szabolcs, Wolfdieter Bernard, Franz A. Horster

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

OBJECTIVE: To investigate the effect of age, clinical condition, and thyroid function on the prevalence of thyroid autoantibody positivity in hospitalized chronic geriatric patients. DESIGN: A screening study of hospitalized chronic geriatric patients. PARTICIPANTS: 249 non‐selected, hospitalized, chronic geriatric patients more than 60 years of age and 81 20 to 40‐year‐old healthy persons. MEASUREMENTS: Thyrotropin (TSH); thyroxine (T4) and free thyroxine (FT4); and triiodothyronine (T3), thyroglobulin (Tg), antibodies against thyroid peroxidase (AbTPO) and antibodies against thyroglobulin (AbTg) estimation in a screening study. RESULTS: AbTPO positivity (AbTPO+) was found more often than AbTg positivity (AbTg+) (15.3% vs 9.2%, P = .04), one being positive (Ab+) in 19.3%. The occurrence was higher in females than males (Ab+:27.1% vs 7.1%, P < .001; AbTPO+:21.9% vs 5.1%, P < .001; AbTg+:13.2% vs 3.1%, P = .0052). Among the Ab+ patients, AbTPO was more often positive than AbTg (40/48 vs 21/48, P < .001). The sensitivity, specificity, and positive predictive value of Ab positivity to detect a thyroid disorder were 0.35, 0.85 and 0.38, respectively. Within the population of euthyroid geriatric patients, the occurrence of AbTg+ (χ22 = 8.65, P = .013) and Ab+ (χ22 = 8.02, P = .018) correlated positively with the age of the patients, and there was also a female predominance (AbTPO+ 18% vs 3.7% in the males; AbTg+ 13% vs 2.4%; Ab+ 25.8% vs 6.1%). When compared with 20 to 40‐year‐old subjects, only the euthyroid ≥ 80‐year‐old patients showed a significantly higher occurrence of Ab+ (26.2% vs 9.9% χ21 = 5.64, P = .017). In the euthyroid ≥80‐year‐old females, AbTPO+ was 25%, AbTg:22.2%, and Ab+: 36.1%!. The nonthyroidal clinical state of the euthyroid patients did not correlate with the antibody prevalence. CONCLUSIONS: In hospitalized chronic geriatric patients, AbTg and especially AbTPO positivity is frequent, even in euthyroid patients without goiter. This aspecific Ab positivity in the euthyroid state correlates to the age, but not to the severity of the nonthyroidal clinical condition of the patients and explains why the Ab positivity is not predictive enough for thyroid dysfunction in this subpopulation. Thus, in hospitalized chronic geriatric patients the AbTg and AbTPO titers should be examined only in cases where thyroid screening (TSH) reveals abnormal results. 1995 The American Geriatrics Society

Original languageEnglish
Pages (from-to)670-673
Number of pages4
JournalJournal of the American Geriatrics Society
Volume43
Issue number6
DOIs
Publication statusPublished - Jun 1995

ASJC Scopus subject areas

  • Geriatrics and Gerontology

Fingerprint Dive into the research topics of 'Thyroid Autoantibodies in Hospitalized Chronic Geriatric Patients: Prevalence, Effects of Age, Nonthyroidal Clinical State, and Thyroid Function'. Together they form a unique fingerprint.

  • Cite this