Table 2 Comparison of mean nodule sizes before and after RFA
From: Effect of ultrasound parameters of benign thyroid nodules on radiofrequency ablation efficacy
Variable | Median | Mean | S.E | 95% confidence interval | Z | P-Value | |
|---|---|---|---|---|---|---|---|
Lower | Upper | ||||||
Initial nodule size | 40 | 49.98 | 3.75 | 42.58 | 57.38 | - | - |
Nodule size 1 month after RFA | 27 | 32.30 | 2.48 | 27.39 | 37.21 | 11.758 | 0.0000 |
Nodule size 3 months after RFA | 17 | 25.40 | 2.16 | 21.13 | 29.67 | 11.764 | 0.0000 |
Nodule size 6 months after RFA | 14 | 22.18 | 1.97 | 18.28 | 26.08 | 11.764 | 0.0000 |
Nodule size 12 months after RFA | 12.5 | 22.10 | 1.99 | 18.17 | 26.03 | 11.764 | 0.0000 |