Supplementary Table 2.
Comparison of clinicopathological characteristics of patients treated with curative intent classified according to the extent of lymphadenectomy
| Clinicopathological characteristics | D1/D1+ (n = 68) | D2 (n = 132) | P |
|---|---|---|---|
| Gender (male), n (%) | 56 (82.4) | 103 (78.0) | 0.473 |
| Age (years), mean ± SD | 78.8 ± 3.2 | 77.9 ± 3.2 | 0.061 |
| Charlson comorbidity score, n (%) | |||
| <2 | 37 (54.4) | 92 (69.7) | 0.032 |
| ≥2 | 31 (45.6) | 40 (30.3) | |
| BMI (kg/m2), mean ± SD | 22.0 ± 3.7 | 22.0 ± 3.8 | 0.926 |
| Performance status, n (%) | |||
| 0 | 3 (4.4) | 3 (2.3) | 0.142 |
| 1 | 17 (25.0) | 54 (40.9) | |
| 2 | 37 (54.4) | 59 (44.7) | |
| 3 | 11 (16.2) | 16 (12.1) | |
| POSSUM, n (%) | |||
| <20 | 35 (51.5) | 91 (68.9) | 0.015 |
| ≥20 | 33 (48.5) | 41 (31.1) | |
| Type of gastrectomy, n (%) | |||
| Subtotal | 55 (80.9) | 93 (70.5) | 0.111 |
| Total | 13 (19.1) | 39 (29.5) | |
| Tumor location, n (%) | |||
| Upper one-third | 31 (45.6) | 28 (21.2) | 0.001 |
| Middle one-third | 3 (4.4) | 18 (13.6) | |
| Lower one-third | 28 (41.2) | 59 (44.7) | |
| Two-thirds or more | 6 (8.8) | 27 (20.5) | |
| Tumor size (cm), mean ± SD | 4.3 ± 2.0 | 4.7 ± 1.7 | 0.145 |
| Histology, n (%) | |||
| Differentiated | 29 (42.6) | 59 (44.7) | 0.782 |
| Undifferentiated | 39 (57.4) | 73 (55.3) | |
| Histotype (Lauren), n (%) | |||
| Intestinal | 36 (52.9) | 64 (48.5) | 0.748 |
| Diffuse | 13 (19.1) | 34 (25.8) | |
| Mixed | 15 (22.1) | 28 (21.2) | |
| Other | 4 (5.9) | 6 (4.5) | |
| Grading (Bormann), n (%) | |||
| I | 8 (11.8) | 26 (19.7) | 0.496 |
| II | 17 (25.0) | 33 (25.0) | |
| III | 42 (61.8) | 72 (54.5) | |
| IV | 1 (1.4) | 1 (0.7) | |
| pT, n (%) | |||
| T1 | 7 (10.3) | 15 (11.4) | 0.081 |
| T2 | 5 (7.4) | 14 (10.6) | |
| T3 | 8 (11.7) | 33 (25.0) | |
| T4 | 48 (70.6) | 70 (53.0) | |
| pN, n (%) | |||
| N0 | 21 (30.9) | 40 (30.3) | 0.933 |
| N+ | 47 (69.1) | 92 (69.7) | |
| pTNM stage, n (%) | |||
| I | 10 (14.7) | 19 (14.4) | 0.784 |
| II | 15 (22.1) | 35 (26.5) | |
| III | 43 (63.2) | 78 (59.1) |
BMI: Body mass index; D1/D1+: Patients who underwent R0 resection and D1 or D1+ lymphadenectomy; D2: Patients who underwent R0 resection and D2 lymphadenectomy; POSSUM: Physiological and operative severity score for the enumeration of mortality and morbidity; SD: Standard deviation.