Table 1.

Analysis of clinical and pathological characteristics according to the presence or absence of Hashimoto thyroiditis among cases of papillary thyroid carcinoma.

	Hashimoto thyroiditis
	Present	Absent	Total	p-Value
	Mean (SD)	Mean (SD)	Mean (SD)
Age (years)	45.97 (14.10)	47.15 (14.14)	46.73 (14.12)	0.418
Tumor diameter (cm)	1.40 (1.15)	1.91 (1.70)	1.73 (1.54)	–

	Median (Min–Max)	Median (Min–Max)	Median (Min–Max)	p-Value
Tumor diameter	1.2 (0.04–6.5)	1.3 (0.1–9)	1.2 (0.04–9)	0.007

	n (148)	% (35.4)	n (269)	% (64.5)	n (417)	% (100)	p-Value
Women/men	136/12	91.8/8.1	203/66	75.4/24.5	339/78	81.2/18.7	<0.001
Neurovascular invasion	9	6.0	18	6.6	27	6.4	0.972
Multifocality	32	21.6	53	19.7	85	20.3	0.735
Multicentricity	54	36.4	78	28.9	132	31.6	0.143
Extracapsular invasion	33	22.2	96	35.6	129	30.9	0.006
Lymphadenectomy	79	53.3	102	37.9	181	43.4	0.003
T stage
1	98	66.2	126	46.8	224	53.7	0.002
2	12	8.1	31	11.5	43	10.3
3	38	25.6	109	40.5	147	35.2
4	0	0	3	1.1	3	0.7
N stage
0 ou X	115	77.7	200	74.3	315	75.5	0.240
1a	23	15.5	37	13.7	60	14.3
1b	10	6.7	32	11.8	42	10.0
M stage
0	148	100	267	99.2	415	99.5	0.755
1	0	0	2	0.7	2	0.4
Clinicopathological staging
I	119	80.4	181	67.2	300	71.9	0.019
II	5	3.3	10	3.7	15	3.5
III	22	14.8	63	23.4	85	20.3
IV	2	1.3	15	5.5	17	4.0

n, absolute frequency; %, relative frequency; SD, standard deviation; Min–Max, variation between minimum and maximum; p-value, level of significance used; multifocality, refers to more than one tumor focus in the same lobe; multicentricity, refers to the presence of bilateral disease.