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. 2021 Sep 3;9:e11946. doi: 10.7717/peerj.11946

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%)