Figure 1.

TSH (A) or FT₃ (B) vs weight-adjusted l-T₄ dose in three groups of patients on thyroid hormone replacement, with autoimmune thyroiditis (n=96), after surgery for benign goitre (n=111) or thyroid carcinoma (n=143). Between group differences in both panels were significant (P<0.01) and remained so after adjusting for volume (not shown, P<0.01), as evidenced by linear models with the diagnostic group as a covariate. See text for further details. AIT, autoimmune thyroiditis; Goitre, goitre post surgery for benign nodular thyroid disease.