Table 6 Factors related to recurrence of benign thyroid nodules
|  | Recurrence group | Non-recurrence group | X2 | p values |
|---|---|---|---|---|
Number of patients | 7 | 299 | – | – |
Maximum diameter of nodule (mm) | 46 (38.5–48.5) | 33 (20–42.5) | 0.515 | 0.473 |
Initial volume (mL) | 13.86 (6.06–15.42) | 7.86 (2.25–17.04) | 0.192 | 0.661 |
ablation power (w) | 31.10 ± 2.62 | 30.53 ± 1.84 | 0.370 | 0.543 |
Energy volume ratio ΔE (kJ/mL) | 2.66 (2.03–5.85) | 0.94 (0.48–1.81) | 8.124 | 0.004 |