Table 2.

Basic information following propensity score matching.

Variable	COT	GETTSA	Z/X2	P	SMD
Age (years)	43.00 (36.00–51.00)	42.00 (35.00–51.75)	-0.707	0.479	-0.112
Body mass index (kg/m2)	25.40 (23.03–28.18)	24.80 (22.60–28.70)	-0.816	0.415	-0.055
Maximum tumor diameter (cm)	0.75 (0.50–1.00)	0.70 (0.50–1.00)	-0.355	0.722	-0.058
Tumor location			0.049	0.825	0.024
Right	89	87
Left	75	77
Sex			0.391	0.532	-0.070
Male	46	41
Female	118	123
Hypertension			0.051	0.822	0.024
Yes	154	153
No	10	11
Coronary artery atherosclerotic heart disease			-	> 0.999	0.078
Yes	0	1
No	164	163
Diabetes			0.847	0.358	-0.119
Yes	7	4
No	157	160
Chronic lymphocytic thyroiditis			0.015	0.903	-0.013
Yes	48	47
No	116	117
Thyroid capsule invasion			0.058	0.810	0.027
Yes	113	115
No	51	49