Table 1 Correlations between SII and clinicopathological factors of GC patients before and after PSM
Parameters | Before PSM | After PSM | ||||||
|---|---|---|---|---|---|---|---|---|
H-SII (n = 240) | L-SII (n = 531) | χ2 | P | H-SII (n = 177) | L-SII (n = 177) | χ2 | P | |
Age (years) | Â | Â | 3.415 | 0.065 | Â | Â | 0.011 | 0.915 |
 ≤ 60 | 129(53.75%) | 323(60.83%) |  |  | 100(56.50%) | 99(55.93%) |  |  |
 > 60 | 111(46.25%) | 208(39.17%) |  |  | 77(43.50%) | 78(44.07%) |  |  |
Gender | Â | Â | 0.097 | 0.756 | Â | Â | 0.000 | 1.000 |
 Male | 187(77.92%) | 419(78.91%) |  |  | 138(77.97%) | 138(77.97%) |  |  |
 Female | 53(22.08%) | 112(21.09%) |  |  | 39(22.03%) | 39(22.03%) |  |  |
Smoking | Â | Â | 0.234 | 0.628 | Â | Â | 0.011 | 0.915 |
 Yes | 113(47.08%) | 260(48.96%) |  |  | 84(47.46%) | 83(46.89%) |  |  |
 No | 127(52.92%) | 271(51.04%) |  |  | 93(52.54%) | 94(53.11%) |  |  |
Drinking | Â | Â | 1.246 | 0.264 | Â | Â | 1.457 | 0.227 |
 Yes | 91(37.92%) | 224(42.18%) |  |  | 72(40.68%) | 61(34.46%) |  |  |
 No | 149(62.08%) | 307(57.82%) |  |  | 105(59.32%) | 116(65.54%) |  |  |
Tumor size (mm) | Â | Â | 11.357 | < 0.001 | Â | Â | 0.232 | 0.630 |
 ≤ 50 | 168(70.00%) | 429(80.79%) |  |  | 128(72.32%) | 132(74.58%) |  |  |
 > 50 | 72(30.00%) | 102(19.21%) |  |  | 49(27.68%) | 45(25.42%) |  |  |
Differentiation | Â | Â | 4.188 | 0.041 | Â | Â | 0.000 | 1.000 |
 Well and moderately | 73(30.42%) | 202(38.04%) |  |  | 61(34.46%) | 61(34.46%) |  |  |
 Poorly | 167(69.58%) | 329(61.96%) |  |  | 116(65.54%) | 116(65.54%) |  |  |
Alb (g/L) | Â | Â | 33.695 | < 0.001 | Â | Â | 0.000 | 1.000 |
 ≤ 39.85 | 183(76.25%) | 288(54.24%) |  |  | 121(68.36%) | 121(68.36%) |  |  |
 > 39.85 | 57(23.75%) | 243(45.76%) |  |  | 56(31.64%) | 56(31.64%) |  |  |
WBC(W, × 109 cells/L) |  |  | 107.173 | < 0.001 |  |  | 0.113 | 0.737 |
 ≤ 6.525 | 119(49.58%) | 451(84.93%) |  |  | 118(66.67%) | 115(64.97%) |  |  |
 > 6.525 | 121(50.41%) | 80(15.07%) |  |  | 59(33.33%) | 62(35.03%) |  |  |
CEA | Â | Â | 0.542 | 0.462 | Â | Â | 0.554 | 0.457 |
 ≤ 2.17 ug/ml | 128(53.33%) | 268(50.47%) |  |  | 89(50.28%) | 82(46.33%) |  |  |
 > 2.17 ug/ml | 112(46.67%) | 263(49.53%) |  |  | 88(49.72%) | 95(53.67%) |  |  |
CA199 | Â | Â | 0.835 | 0.361 | Â | Â | 0.0137 | 0.711 |
 ≤ 21 u/mL | 179(74.58%) | 412(77.59%) |  |  | 135(76.27%) | 132(74.58%) |  |  |
 > 21 u/mL | 61(25.42%) | 119(22.41%) |  |  | 42(23.73%) | 45(25.42%) |  |  |
CA125 | Â | Â | 6.671 | 0.010 | Â | Â | 1.532 | 0.216 |
 ≤ 14.6 u/ml | 145(60.42%) | 371(69.87%) |  |  | 112(63.28%) | 123(69.49%) |  |  |
 > 14.6 u/ml | 95(39.58%) | 160(30.13%) |  |  | 65(36.72%) | 54(30.51%) |  |  |
Type of surgery | Â | Â | 5.572 | 0.062 | Â | Â | 4.974 | 0.084 |
 DG | 80(33.33%) | 217(40.87%) |  |  | 57(32.21%) | 39(22.04%) |  |  |
 PG | 78(32.50%) | 172(32.39%) |  |  | 59(33.33%) | 63(35.59%) |  |  |
 TG | 82(34.17%) | 142(26.74%) |  |  | 61(34.46%) | 75(42.37%) |  |  |
TNM stage | Â | Â | 11.509 | 0.003 | Â | Â | 2.425 | 0.298 |
 I | 38(15.83%) | 137(25.80%) |  |  | 34(16.95%) | 35(19.77%) |  |  |
 II | 43(17.92%) | 105(19.78%) |  |  | 31(17.51%) | 40(22.60%) |  |  |
 III | 159(66.25%) | 289(54.42%) |  |  | 116(65.54%) | 102(57.63%) |  |  |