Table 1.

Basic information.

Variable	COT	GETTSA	Z/X2	P	SMD
Age (years)	51.00(40.00–58.00)	40.00(33.00–48.00)	-8.317	<0.001	-0.893
Body mass index (kg/m2)	25.50 (23.40–28.30)	24.70 (22.50–28.40)	-2.033	0.042	-0.145
Maximum tumor diameter (cm)	0.800(0.500–1.100)	0.70 (0.50–1.00)	-2.128	0.033	-0.171
Tumor location			0.201	0.654	-0.041
Right	144	114
Left	133	97
Sex					-0.015
Male	70	52	0.025	0.874
Female	207	159
Hypertension			22.761	0.000	-0.675
Yes	56	11
No	221	200
Coronary artery atherosclerotic heart disease			6.107	0.013	-0.509
Yes	11	1
No	266	210
Diabetes			7.261	0.007	-0.390
Yes	257	207
No	20	4
Chronic lymphocytic thyroiditis			0.000	0.999	0.000
Yes	84	147
No	193	64
Thyroid capsule invasion			5.036	0.025	-0.197
Yes	201	133
No	76	78