An Important Note: The researchers were defining overt hypothyroidism as a TSH above 4.8, with elevated Free T4 levels. Subclinical hypothyroidism was defined as a TSH above 4.8, with normal range Free T4 levels. The American Association of Clinical Endocrinologists, along with the National Academy of Clinical Biochemistry, recommended in late 2002/early 2003 that the TSH normal range be narrowed substantially to .3 to 3.0. So the point at which someone would be considered overtly hypothyroid might be different, based on