Table 2. Equilibrium comparison of baseline characteristics of GIST patients before and after propensity score matching. stratified by gender (male vs. female).

	Before matching				After matching
Characteristics	Male	Female	p		Male	Female	p
	4,139 (51.8%)	3,844 (48.2%)			2,567 (50%)	2,567 (50%)
Tumor site			0.054				1.0
Stomach	2,192 (53.0%)	2,188 (56.9%)			1,467 (57.1%)	1,467 (57.1%)
Small intestine	1,177 (28.4%)	977 (25.4%)			716 (27.9%)	716 (27.9%)
Rectum	138 (3.3%)	85 (2.2%)			37 (1.4%)	37 (1.4%)
Colon	112 (2.7%)	107 (2.8%)			40 (1.6%)	40 (1.6%)
Others	520 (12.6%)	487 (12.7%)			307 (12.0%)	307 (12.0%)
Age			<0.001				1.0
≤60	1,958 (47.3%)	1,607 (41.8%)			1,259 (49.0%)	1,259 (49.0%)
>60	2,181 (52.7%)	2,237 (58.2%)			1,308 (51.0%)	1,308 (51.0%)
Therapy			<0.001				1.0
Surgery	3,190 (77.1%)	3,086 (80.3%)			2,090 (81.4%)	2,090 (81.4%)
No surgery	911 (22.0%)	731 (19.0%)			473 (18.4%)	473 (18.4%)
Unknown	38 (0.9%)	27 (0.7%)			4 (0.2%)	4 (0.2%)
Marital status			<0.001				1.0
Married	2,751 (66.5%)	1,861 (48.4%)			1,675 (65.3%)	1,675 (65.3%)
Widowed	189 (4.6%)	773 (20.1%)			157 (6.1%)	157 (6.1%)
Single/unmarried	678 (16.4%)	636 (16.5%)			438 (17.1%)	438 (17.1%)
Divorced/separated	318 (7.7%)	386 (10.0%)			199 (7.8%)	199 (7.8%)
Unknown	203 (4.9%)	188 (4.9%)			98 (3.8%)	98 (3.8%)
Race			0.62				1.0
White	2,891 (69.8%)	2,578 (67.1%)			1,849 (72.0%)	1,849 (72.0%)
Black	680 (16.4%)	729 (19.0%)			399 (15.5%)	399 (15.5%)
Others	568 (13.7%)	537 (14.0%)			319 (12.4%)	319 (12.4%)
Grade			0.37				1.0
I/II	715 (17.3%)	765 (19.9%)			467 (18.2%)	467 (18.2%)
III/IV	482 (11.6%)	387 (10.1%)			230 (9.0%)	230 (9.0%)
Unknown	2942 (71.1%)	2692 (70.0%)			1,870 (72.8%)	1,870 (72.8%)
Tumor size			<0.001				1.0
≤2 cm	203 (4.9%)	276 (7.2%)			121 (4.7%)	121 (4.7%)
2–5 cm	717 (17.3%)	775 (7.2%)			480 (18.7%)	480 (18.7%)
5–10 cm	933 (22.5%)	870 (22.6%)			578 (22.5%)	578 (22.5%)
>10 cm	2,286 (55.2%)	1,923 (50.0%)			1,388 (54.1%)	1,388 (54.1%)