Symptoms of thyroid dysfunction are difficult to detect in elderly people and TSH is sometimes unreliable. We therefore tested the value of SHBG as a marker of thyroid hormone action on the liver to determine the thyroid status of elderly people. Aging euthyroid men and women have a significant increase in SHBG (p > 0.0001). In aging women the decrease in SHBG with hypothyroidism and increase with hyperthyroidism are highly significant (p < 0.0001 and p < 0.0005 respectively). No significant variation in SHBG was observed in men with thyroid dysfunction. SHBG can help to determine the thyroid status of aging women.
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Lecomte et al. (2009) studied this question.
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