1. Patient characteristics.
| Variable | Before PSM | After PSM | ||||||||
| Non-T2DM
group (n=1,621) |
T2DM
group (n=71) |
Statistic | P | Non-T2DM
group (n=139) |
T2DM
group (n=71) |
Statistic | P | |||
| HBsAg, hepatitis B surface antigen; PSM, propensity score matching; T2DM, type 2 diabetes mellitus. | ||||||||||
| Sex | 0.407 | 0.899 | ||||||||
| Male | 1,088 (67.1) | 51 (71.8) | 0.686 | 101 (72.7) | 51 (71.8) | 0.016 | ||||
| Female | 533 (32.9) | 20 (28.2) | 38 (27.3) | 20 (28.2) | ||||||
| Age (year) | 0.001 | 0.767 | ||||||||
| <40 | 187 (11.5) | 1 (1.4) | −0.318 | 2 (1.4) | 1 (1.4) | −0.296 | ||||
| 40−69 | 1,249 (77.1) | 56 (78.9) | 112 (80.6) | 56 (78.9) | ||||||
| ≥70 | 185 (11.4) | 14 (19.7) | 25 (18.0) | 14 (19.7) | ||||||
| Hepatitis | 0.904 | 0.672 | ||||||||
| No | 1,535 (94.7) | 67 (94.4) | 0.015 | 133 (95.7) | 67 (94.4) | 0.180 | ||||
| Yes | 86 (5.3) | 4 (5.6) | 6 (4.3) | 4 (5.6) | ||||||
| HBsAg (+) | 0.792 | 0.491 | ||||||||
| No | 1,517 (93.6) | 67 (94.4) | 0.070 | 134 (96.4) | 67 (94.4) | 0.475 | ||||
| Yes | 104 (6.4) | 4 (5.6) | 5 (3.6) | 4 (5.6) | ||||||
| Tumor location | 0.187 | 0.487 | ||||||||
| Upper | 275 (17.0) | 18 (25.4) | 3.357 | 30 (21.6) | 18 (25.4) | 1.437 | ||||
| Middle | 345 (21.3) | 14 (19.7) | 21 (15.1) | 14 (19.7) | ||||||
| Lower | 1,001 (61.8) | 39 (54.9) | 88 (63.3) | 39 (54.9) | ||||||
| Ascites | 0.977 | 0.324 | ||||||||
| No | 1,531 (94.4) | 67 (94.4) | 0.001 | 135 (97.1) | 67 (94.4) | 0.974 | ||||
| Yes | 90 (5.6) | 4 (5.6) | 4 (2.9) | 4 (5.6) | ||||||
| Gastrectomy | 0.861 | 0.905 | ||||||||
| Total | 500 (30.8) | 24 (33.8) | 0.298 | 43 (30.9) | 24 (33.8) | 0.199 | ||||
| Proximal | 112 (6.9) | 5 (7.0) | 11 (7.9) | 5 (7.0) | ||||||
| Distal | 1,009 (62.2) | 42 (59.2) | 85 (61.2) | 42 (59.2) | ||||||
| Reconstruction | 0.391 | 0.470 | ||||||||
| Roux-en-Y | 515 (31.8) | 26 (36.6) | 0.735 | 44 (31.7) | 26 (36.6) | 0.521 | ||||
| Others | 1,106 (68.2) | 45 (63.4) | 95 (68.3) | 45 (63.4) | ||||||
| Lymphadenectomy | 0.689 | 0.917 | ||||||||
| Non-D2/D2+ | 233 (14.4) | 9 (12.7) | 0.160 | 15 (10.8) | 8 (11.3) | 0.011 | ||||
| D2/D2+ | 1,388 (85.6) | 62 (87.3) | 124 (89.2) | 63 (88.7) | ||||||
| Radical resection | 0.516 | 0.842 | ||||||||
| Yes | 1,296 (80.0) | 59 (83.1) | 0.423 | 117 (84.2) | 59 (83.1) | 0.040 | ||||
| No | 325 (20.0) | 12 (16.9) | 22 (15.8) | 12 (16.9) | ||||||
| Approach | 0.300 | 0.922 | ||||||||
| Open/Conversion | 671 (41.4) | 25 (35.2) | 1.074 | 48 (34.5) | 25 (35.2) | 0.010 | ||||
| Laparoscopy | 950 (58.6) | 46 (64.8) | 91 (65.5) | 46 (64.8) | ||||||
| Receiv adjuvant chemotherapy | 0.720 | 0.824 | ||||||||
| No | 924 (57.0) | 42 (59.2) | 0.129 | 80 (57.6) | 42 (59.2) | 0.049 | ||||
| Yes | 697 (43.0) | 29 (40.8) | 59 (42.4) | 29 (40.8) | ||||||
| Histology | 0.058 | 0.010 | ||||||||
| Signet-ring cell | 332 (20.5) | 8 (11.3) | 3.596 | 37 (26.6) | 8 (11.3) | 6.578 | ||||
| Others | 1,289 (79.5) | 63 (88.7) | 102 (73.4) | 63 (88.7) | ||||||
| Grade | 0.938 | 0.639 | ||||||||
| G1−G2 | 340 (21.0) | 15 (21.1) | 0.127 | 29 (20.9) | 15 (21.1) | 0.896 | ||||
| G3−G4 | 1,097 (67.7) | 47 (66.2) | 98 (70.5) | 47 (66.2) | ||||||
| Unknown | 184 (11.4) | 9 (12.7) | 12 (8.6) | 9 (12.7) | ||||||
| Vascular invasion | 0.454 | 0.321 | ||||||||
| No | 1,356 (83.7) | 57 (80.3) | 0.561 | 119 (85.6) | 57 (80.3) | 0.984 | ||||
| Yes | 265 (16.3) | 14 (19.7) | 20 (14.4) | 14 (19.7) | ||||||
| Neural invasion | 0.217 | 0.422 | ||||||||
| No | 1,245 (76.8) | 59 (83.1) | 1.525 | 109 (78.4) | 59 (83.1) | 0.644 | ||||
| Yes | 376 (23.2) | 12 (16.9) | 30 (21.6) | 12 (16.9) | ||||||
| Lymphatic vessel invasion | 0.503 | 0.721 | ||||||||
| No | 1,414 (87.2) | 60 (84.5) | 0.449 | 120 (86.3) | 60 (84.5) | 0.128 | ||||
| Yes | 207 (12.8) | 11 (15.5) | 19 (13.7) | 11 (15.5) | ||||||
| Primary tumor invasion | 0.860 | 0.814 | ||||||||
| T1 | 287 (17.7) | 16 (22.5) | −0.176 | 32 (23.0) | 16 (22.5) | −0.236 | ||||
| T2 | 138 (8.5) | 4 (5.6) | 7 (5.0) | 4 (5.6) | ||||||
| T3 | 112 (6.9) | 3 (4.2) | 9 (6.5) | 3 (4.2) | ||||||
| T4 | 1,084 (66.9) | 48 (67.6) | 91 (65.5) | 48 (67.6) | ||||||
| Lymph node status | 0.571 | 0.667 | ||||||||
| N0 | 609 (37.6) | 24 (33.8) | −0.566 | 50 (36.0) | 24 (33.8) | −0.430 | ||||
| N1 | 260 (16.0) | 13 (18.3) | 26 (18.7) | 13 (18.3) | ||||||
| N2 | 316 (19.5) | 13 (18.3) | 26 (18.7) | 13 (18.3) | ||||||
| N3 | 436 (26.9) | 21 (29.6) | 37 (26.6) | 21 (29.6) | ||||||
| Metastasis | 0.550 | 0.662 | ||||||||
| No | 1,398 (86.2) | 63 (88.7) | 0.358 | 126 (90.6) | 63 (88.7) | 0.192 | ||||
| Yes | 223 (13.8) | 8 (11.3) | 13 (9.4) | 8 (11.3) | ||||||
| Tumor size (cm) | 0.481 | 0.568 | ||||||||
| <5 | 981 (60.5) | 40 (56.3) | 0.497 | 84 (60.4) | 40 (56.3) | 0.326 | ||||
| ≥5 | 640 (39.5) | 31 (43.7) | 55 (39.6) | 31 (43.7) | ||||||