Table 1.

PN expression in tumor epithelial cells and clinicopathological characteristics of PTC.

Clinicopathologic features	Case number		PN				χ 2	OR (95% CI)
			Low score		High score
	#	%	#	%	#	%	p value
Sex
Female	41	82	12	29.27	29	70.73	p = 0.6699	0.69 (0.12–3.81)
Male	9	18	2	22.22	7	77.78
Age
<45	21	42	7	33.33	14	66.67	p = 0.4748	0.63 (0.18–2.20)
>45	29	58	7	24.14	22	75.86
Tumor stage
Stages I, II	24	48	7	29.17	17	70.83	p = 0.8599	0.89 (0.26–3.07)
Stages III, IV	26	52	7	26.92	19	73.08
Histologic subtype
Conventional	10	20	0	0	10	100	p = 0.0002	10.86 (0.55–211.91)
Follicular	21	42	7	33.33	14	66.67
Macrofollicular	7	14	0	0	7	100		1.4 (0.02–78.80)
Tall cells	4	8	0	0	4	100		1.00 (0.24–4.13)
Oncocytic	8	16	7	87.5	1	12.5		105.00 (3.73–2948.28)
Multifocality
Yes	34	68	10	29.41	24	70.59	p = 0.7459	0.8 (0.20–3.08)
No	16	32	4	25	12	75
Tumor size
<2.18 cm	35	70	10	28.57	25	71.43	p = 0.8907	0.90 (0.23–3.53)
>2.18 cm	15	30	4	26.67	11	73.33
Lymphovascular invasion
Absent	36	72	12	33.33	24	66.67	p = 0.1780	0.33 (0.06–1.73)
Present	14	28	2	14.29	12	85.71
Lymph node metastasis
Absent	43	86	12	27.91	31	72.09	p = 0.9710	1.03 (0.17–6.06)
Present	7	14	2	28.57	5	71.43
Extrathyroidal invasion
Absent	27	54	8	29.63	19	70.37	p = 0.7810	0.83 (0.24–2.90)
Present	23	46	6	26.09	17	73.91

χ ²: chi-square test; OR: odd ratio; CI: confidence interval.