Table 2.
Epidemiology and clinical features
| All (n = 161) | Less strict LID group (n = 71) | Very strict LID group (n = 90) | p | |
|---|---|---|---|---|
| Age (years) | 47.8 ± 11.2 | 45.1 ± 10.1 | 50.0 ± 11.5 | 0.005 |
| Males/females, n (%) | 28/133 (17.4/82.6) | 12/59 (16.9/83.1) | 16/74 (17.8/72.2) | 0.884 |
| Interval from op to ablation (months) | 4.0 ± 1.7 | 4.2 ± 1.8 | 3.9 ± 1.6 | 0.385 |
| Remnant uptake on pre-ablation scan (n) | ||||
| Grade I | 58 | 26 | 32 | 0.310 |
| Grade II | 43 | 15 | 28 | |
| Grade III | 60 | 30 | 30 | |
| Pre-ablation TFT | ||||
| TSH | 71.1 ± 24.8 | 69.9 ± 27.4 | 77.3 ± 22.2 | 0.061 |
| Tg | 7.5 ± 21.1 | 7.0 ± 21.2 | 7.8 ± 21.2 | 0.801 |
| Anti-Tg | 20.7 ± 30.7 | 17.8 ± 27.6 | 22.9 ± 32.8 | 0.294 |
| Tumor size (cm) | 1.3 ± 0.9 | 1.3 ± 0.9 | 1.3 ± 0.9 | 0.536 |
| T stage | ||||
| T1 | 94 | 46 | 48 | 0.139 |
| T2 | 6 | 4 | 2 | |
| T3 | 43 | 13 | 30 | |
| T4 | 18 | 8 | 10 | |
| Capsular invasion, positive (n) | 109 | 48 | 61 | 0.981 |
| Extrathyroidal extension, positive (n) | 58 | 20 | 38 | 0.065 |
| Home-cooked meals only (n) | 98 | 46 | 52 | 0.365 |
LID Low iodine diet, TFT thyroid function test