Published online by Cambridge University Press: 02 January 2018
The common thyroid disorders are all autoimmune in origin, with the lifetime risk of thyroid disease being 1–2%. Thyroid autoantibodies are present in 9% of the adult population and 12.7% of women, with the frequency rising steeply in women over 45 years of age (Myers & West, 1987). In addition, 20% of the over 60–year-olds have an abnormal (raised) thyroid stimulating hormone (TSH). The presence of both raised TSH and thyroid autoantibodies is associated with the development of clinical hypothyroidism at the rate of 5% per year (Myers & West, 1987).
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