Table 2.
Comparison of patient characteristics between the 2 groups.
| Characteristic | Rapid 131I turnover | P | |
|---|---|---|---|
| Present (n = 590) | Absent (n = 1953) | ||
| Gender | |||
| Male | 126(21.4%) | 667(34.2%) | <0.0001* |
| Female | 464(78.6%) | 1286(65.8%) | |
| Age(years) | 33.0(11–78) | 42.0 (10–80) | <0.0001** |
| FT3(pmol/l) | 38.2(11.6–50) | 31.3(6.6–50) | <0.0001** |
| FT4(pmol/l) | 86.5(32.2–100) | 78.9(28.0–100) | 0.0010** |
| Disease duration (mons) | 12.5(0.3–264) | 12.0(0.2–360) | 0.1090 |
| ATD | |||
| With | 442(74.9%) | 1300(66.6%) | <0.0001* |
| Without | 148(25.1%) | 653(33.4%) | |
| Time of ATD | 6.0(0–240) | 2.0 (0–216) | 0.0010** |
| 4 h thyroid 131I uptake(%) | 42(7–89) | 40(9–92) | 0.2060 |
| 24 h thyroid 131I uptake(%) | 75(35–96) | 77(32–95) | 0.5340 |
| Thyroid weight(g) | 68.0(20–212) | 48.5(15–212) | <0.0001** |
| Complications | |||
| With | 151(25.60%) | 511(26.2%) | 0.7820 |
| Without | 439(74.4%) | 1442(73.8%) | |
| Thyroid nodules | |||
| With | 81(13.7%) | 283(14.5%) | 0.6434 |
| Without | 509(86.3%) | 1670(85.5%) | |
| Thyroid textures | |||
| Soft | 266(45.1%) | 1009 (51.7%) | 0.0040* |
| Moderate | 236(40.0%) | 707(36.2%) | |
| Stiff | 88(14.9%) | 237(12.1%) | |
| First-dose 131I failure | |||
| With | 71(12.0%) | 124(6.3%) | <0.0001* |
| Without | 519(88.0%) | 1829(93.7%) | |
Data are presented as count (percentage) or median (range). *P value < 0.01 using chi square test. **P value < 0.01 using Mann–Whitney U test. FT3 = free triiodothyronine, FT4 = free thyroxine, SD = standard deviation, ATD = antithyroid drugs.