Table 4.
T3, triiodothyronine; T4, thyroxine. Percentage in parentheses represents the proportion of cases for each group. *Statistically significant at p < 0.05.
| Early elderly | Late elderly | p Value | |
|---|---|---|---|
| Free T3 | |||
| Mean preoperative level, pg/mL | 2.55 ± 0.49 | 2.29 ± 0.41 | 0.014* |
| Preoperative secretion quantity (range 2.2–4.3 pg/mL), cases | 0.015* | ||
| Normal | 55 (78.6%) | 15 (51.7%) | |
| Low | 15 (21.4%) | 14 (48.3%) | |
| Free T4 | |||
| Mean preoperative level, ng/dL | 0.99 ± 0.27 | 0.93 ± 0.25 | 0.303 |
| Preoperative secretion quantity (range 0.8–1.6 ng/dL), cases | 0.344 | ||
| Normal | 54 (77.1%) | 19 (65.5%) | |
| Low | 16 (22.9%) | 10 (34.5%) | |