TG and hypothyroidism: As shown in Figure 1, 83/152 (54.6%) subjects had anti-Tg prior to the onset of subclinical/overt hypothyroidism, 13/152 (8.6%) had anti-Tg parallel to the onset of subclinical/overt hypothyroidism, 0/42 (0%) had anti-Tg following the onset of subclinical/overt hypothyroidism, and 56/152 (36.8%) had no anti-Tg.