Table 3.
TSH, thyroid-stimulating hormone; TRH, thyrotropin-releasing hormone. Percentage in parentheses represents the proportion of cases for each group. *Statistically significant at p < 0.05.
| Early elderly | Late elderly | p Value | |
|---|---|---|---|
| Baseline TSH level, μIU/mL | |||
| Preoperative | 2.59 ± 1.54 | 2.23 ± 1.47 | 0.278 |
| Postoperative | 1.84 ± 1.29 | 1.43 ± 1.24 | 0.149 |
| TSH response in TRH test, cases | 0.015* | ||
| Preoperative [normal] ― postoperative [normal] | 46 (65.7%) | 11 (37.9%) | |
| Preoperative [normal] ― postoperative [deficiency] | 21 (30.0%) | 12 (41.4%) | |
| Preoperative [deficiency] ― postoperative [normal] | 1 (1.4%) | 2 (6.9%) | |
| Preoperative [deficiency] ― postoperative [deficiency] | 2 (2.9%) | 4 (13.8%) | |