Table 4.

Baseline data of PTC (mPTC and crPTC) between non-HT and HT group.

	Non-HT	HT	Total	P
All size of PTC (n)	1141	581	1722
Age at diagnosis	45.25 ± 13.63	41.40 ± 13.26		<0.01
<45 y	560 (49.1%)	359 (61.8%)	919 (53.4%)	<0.01
⩾45 y	581 (50.9%)	222 (38.2%)	803 (46.6%)
Gender
Male	301 (26.4%)	46 (7.9%)	347 (20.2%)	<0.01
Female	840 (73.6%)	535 (92.1%)	1375 (79.8%)
Number of positive lymph nodes	3.05 ± 0.192	2.66 ± 0.235		0.21
Foci of tumor	1.46 ± 0.025	1.46 ± 0.032		0.91
Maximum diameter (mm)	15.08 ± 0.358	13.92 ± 0.421		0.05
Bilateral tumor	241 (21.2%)	140 (24.1%)	381	0.16
Positive LNM	366 (32.1%)	179 (30.8%)	545	0.60
mPTC (n)	541	282	822
Age at diagnosis	47.21 ± 12.03	43.09 ± 13.04		<0.01
<45 y	226 (41.8%)	159 (56.4%)	385	<0.01
⩾45 y	315 (58.2%)	123 (43.6)	438
Gender
Male	121 (22.4%)	20 (7.1%)	141	<0.01
Female	420 (77.6%)	262 (92.9%)	682
Number of positive lymph nodes	1.71 ± 0.196	1.46 ± 0.237		0.42
Foci of tumor	1.32 ± 0.030	1.40 ± 0.043		0.11
Maximum diameter (mm)	6.02 ± 0.122	6.43 ± 0.165		0.05
Bilateral tumor	66 (12.2%)	52 (18.4%)	118	0.02
Positive LNM	116 (21.4%)	57 (20.2%)	173	0.68
crPTC (n)	600	299	899
Age at diagnosis	43.48 ± 14.72	39.80 ± 13.29		<0.01
<45 y	334 (55.7%)	200 (66.9%)	534	<0.01
⩾45 y	266 (44.3%)	99 (33.1%)	365
Gender
Male	180 (30.0%)	26 (8.7%)	206
Female	420 (70.0%)	273 (91.3%)	693	<0.01
Number of positive lymph nodes	3.97 ± 0.285	3.62 ± 0.363		0.46
Foci of tumor	1.59 ± 0.039	1.51 ± 0.046		0.20
Maximum diameter (mm)	23.26 ± 0.467	20.98 ± 0.549		<0.01
Bilateral tumor	175 (29.3%)	88 (29.5%)	263	0.93
Positive LNM	250 (41.7%)	122 (40.8%)	372	0.80

Data are expressed as number (percentage) or mean ± SD.