Retrospective Analysis of the Efficacy and Safety of Ultrasound-Guided Radiofrequency Ablation in the Treatment of Papillary Thyroid Microcarcinoma: A Follow-Up Study of Continuous Postoperative Surveillance and Large-Sample Data

Table 2

RFA and follow-up data of the 358 patients with unifocal PTMC.

Items	Max	Min	Mean ± SD
Age (years)	75	18	43.37 ± 11.22
Longest diameter before RFA (mm)	10	2	5.71 ± 1.89
Tumor volume before RFA (mm^3)	471.6	3.14	78.5 ± 78.04
RFA time (s)	1200	15	126.99 ± 131.65
RFA power (w)	50	9	22.81 ± 9.63
Follow-up period (m)	56	14	27.7 ± 10.54