In 1995 a group of thyroidologists examined the incidence of hypothyroidism in a particular group near Newcastle-on-Tyne. Among their findings was this remarkable sentence:
Clin Endocrinol (Oxf) 1995 Jul;43(1):55-68.
doi: 10.1111/j.1365-2265.1995.tb01894.x.
The incidence of thyroid disorders in the community: a twenty-year follow-up of the Whickham Survey
M P Vanderpump 1, W M Tunbridge, J M French, D Appleton, D Bates, F Clark, J Grimley Evans, D M Hasan, H Rodgers, F Tunbridge,
A logit model indicated that increasing values of serum TSH above 2mU/l at first survey increased the probability of developing hypothyroidism which was further increased in the presence of anti-thyroid antibodies.
This doesn't seem to have been taken in by doctors - ie that patients with TSH above 2 should be followed up routinely over a long period to detect hypothyroidism when it is finally clearly existing. And this is even more true for patients with antibodies. And yet patients are dismissed if their TSH is less than 10. Seems to be a gap in logic here, in view of patient treatment outcomes..