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 1

Baseline characteristics of 358 patients with unifocal PTMC.

Characteristics	Cases, n = 358 (%)
Gender
Male	67 (18.72)
Female	291 (81.28)
Age
<55	303 (84.64)
≥55	55 (15.36)
Longest diameter (mm)
≤5	153 (42.74)
5.1–8.9	178 (49.72)
9-10	27 (7.54)
Aspect ratio
<1	127 (35.47)
≥1	231 (64.53)
Location
Left lobe	159 (44.41)
Right lobe	162 (45.25)
Isthmus	37 (10.34)
Calcification
With calcification	146 (40.78)
No calcification	212 (59.22)