Table 1 Patient demographics
Characteristics | Number of patients (%) |
|---|---|
Age | 42.1 ± 16 y, 4–94a |
Pediatric pts. < 18 y | 20 (6.3) |
Adult pts. ≥ 18 y | 296 (93.7) |
Total | 316 |
Gender | |
Female | 238 (75.3) |
Male | 78 (24.6) |
Etiology of hyperthyroidism | |
Graves’ disease | 316 (100%) |
History of prior treatment | |
None | 179 (56.6) |
Anti-thyroid medications | |
Propylthiouracil | 80 (25.3) |
Methimazole | 37 (11.7) |
Both (PTU and MMI) | 14 (4.4) |
Total | 137 (43.4) |
Surgery | |
Yes | 6 (1.9) |
Interval between diagnosis and radioiodine treatment | 325.9 d, 0–6818 |
Radioiodine treatment | |
Size of gland (g) | 50.2 ± 18.1, 15–100a |
24-h RAIU | 0.57 ± 0.17 |
131I dose administered (mCi) | 18.1 ± 6.8, 5–70a |
Dosing factor (mCi per gram) | 0.21 ± 0.14 |
Outcomes at First RAI Therapy | 316 |
Success | 295 (93.3) |
Failure | 21 (6.6) |
Failure (needed 2 RAI doses) | 18 (5.7) |
Failure (needed thyroidectomy) | 1 (< 0.3) |
Failure (needed 3 RAI doses) | 2 (< 0.7) |
Interval between radioiodine treatment and hypothyroidism | 97.3 d ± 78.4 |