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Table 3 Accumulated cases showing regrowth in different follow-up time points

From: Roles of contrast-enhanced ultrasonography in identifying volume change of benign thyroid nodule and optical time of secondary radiofrequency ablation

Time after RFA

Accumulated cases showing regrowth

Rate

P

Kappa

1 month

9

20.93%

0.000

0.013

3 month

20

46.51%

0.000

0.041

6 month

25

58.14%

0.000

0.064

12 month

41

95.35%

1.000

0.656

24 month

42

97.67%

1.000

1.000

36 month

43

100.00%

1.000

1.000