TSH Levels by Time After Abrupt T4 Withdrawal
| Time after withdrawal (d) | No. of patients | No. with TSH > 30 μIU/mL |
|---|---|---|
| 7–14 | 7 | 7 (100%) [65%–100%] |
| 15–21 | 54 | 48 (89%) [78%–95%] |
| >21 | 47 | 45 (96%) [86%–99%] |
| Total | 108 | 100 (93%) [86%–97%] |
Ranges in brackets are 95% confidence intervals.