Table 1.

Comparision of the Baseline Demographics and Pathologic Features Between the Isthmus and Control Groups

Variable	Isthmus Group (n = 87)	Control Group (n = 87)	P value
Sex
Male	14	18	0.434
Female	73	69
Age
<55 years	58	53	0.430
≥55 years	29	34
Body mass index, kg/m2	25.4±4.1	25.1±3.8	0.617
Tumor size
≤10 mm	31	29	0.750
>10 mm	56	58
Capsular invasion, yes/no	49/38	22/65	<0.001
Extrathyroidal extension, yes/no	19/68	11/76	0.108
Intraglandular dissemination, yes/no	11/76	6/81	0.202
Concomitant thyroiditis, yes/no	22/65	29/58	0.244
Pathologic subtype
Classical	59	54	0.427
Non-classical	28	33
BRAF gene mutation, yes/no	65/22	61/26	0.497
pTNM stage, I/II/III/IV	65/4/12/6	59/3/21/4	0.349

Notes: Values are n or mean ± standard deviation. Significant values are shown in bold.

Abbreviation: pTNM stage, pathologic TNM stage.