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T3, triiodothyronine; TSH, thyroid-stimulating hormone. Percentage in parentheses represents the proportion of cases for each group. *Statistically significant at p < 0.05.
| Early elderly | Late elderly | p Value | |||
|---|---|---|---|---|---|
| Preoperative free T3 secretion quantity | Preoperative TSH response | 0.001* | |||
| Normal | – | Normal | 52 (74.3%) | 11 (37.9%) | |
| Normal | – | Deficiency | 3 (4.3%) | 4 (13.8%) | |
| Low | – | Normal | 15 (21.4%) | 12 (41.4%) | |
| Low | – | Deficiency | 0 (0.0%) | 2 (6.9%) |
