Of the 951 subjects considered for this study,
819 were euthyroid; 83 had SHyper,
16 of whom had thyrotropin values lower than 0.1 mIU/L; and 29 had SHypo.
Five had overt hypothyroidism and 15 overt hyperthyroidism.
Because of the small number of subjects, these two types of thyroid dysfunction were excluded from all analyses.
Therefore, because the two most-representative groups of thyroid dysfunction were SHyper and SHypo, the relationship between thyroid dysfunction and mortality was calculated
for these two groups and compared with those of the euthyroid group.