Table 1.

Clinical characteristics of papillary thyroid carcinoma patients according to SIRT4 expression.

Variables	SIRT4 (−)	SIRT4 (+)	χ2	P-value
Age (mean ± s.d., years)	48.40 ± 10.6	50.43 ± 11.33	1.329	0.342
<55 years	59	74
≥55 years	27	45
Sex			0.881	0.718
Male	17	26
Female	69	93
ETE			0.334	0.000
(−)	40	86
(+)	46	33
LN metastasis			0.692	0.234
(−)	57	88
(+)	29	31
AJCC, 8th ed. stage			0.680	0.315
I	70	103
II	16	16

AJCC, American Joint Committee on Cancer; ETE, extrathyroid extension; LN, lymph node.