Table 1.
Univariate analysis of the risk factors for lymph node metastasis in early and advanced gastric cancer.
| Risk factor | Early (n = 605) | Advanced (n = 1561) | ||||
|---|---|---|---|---|---|---|
| n | LNM (+) | P | n | LNM (+) | P | |
| Sex | ||||||
| Male | 374 | 63 (16.8%) | 1121 | 839 (74.8%) | ||
| Female | 231 | 46 (19.9%) | 0.34 | 440 | 319 (72.5%) | 0.341 |
| Age (years) | ||||||
| <65 | 411 | 75 (18.2%) | 816 | 606 (74.3%) | ||
| ≥65 | 194 | 34 (17.5%) | 0.829 | 745 | 552 (74.1%) | 0.939 |
| Tumor size (cm) | ||||||
| ≤2 | 392 | 47 (12.0%) | 127 | 55 (43.3%) | ||
| >2 | 213 | 62 (29.1%) | <0.001 | 1434 | 1103 (76.9%) | <0.001 |
| T | ||||||
| T1a | 269 | 17 (6.3%) | ||||
| T1b | 320 | 90 (28.1%) | ||||
| T2 | – | – | 289 | 127 (43.9%) | ||
| T3 | – | – | 270 | 197 (73.0%) | ||
| T4 | – | – | <0.001 | 1002 | 834 (83.2%) | <0.001 |
| Excluded | 16 | 2 (12.5%) | – | – | ||
| M | ||||||
| M0 | – | – | 1553 | 1151 (74.1%) | ||
| M1 | – | – | 8 | 7 (87.5%) | 0.688 | |
| Pathological type | ||||||
| SRCC | 60 | 6 (10%) | 61 | 50 (82.0%) | ||
| DC | 335 | 54 (16.1%) | 648 | 435 (67.1%) | ||
| UDC | 210 | 49 (23.3%) | 0.024 | 852 | 673 (79.0%) | <0.001 |
| Pure/mixed | ||||||
| Pure | 291 | 36 (12.4%) | 788 | 570 (72.3%) | ||
| Mixed | 314 | 73 (23.2%) | <0.001 | 773 | 588 (76.1%) | 0.092 |
| Total | 605 | 109 (18.0%) | 1561 | 1158 (74.2%) | ||
DC, differentiated carcinoma; UDC, undifferentiated carcinoma; SRCC, signet ring cell carcinoma; PEarly SRCC vs. DC=0.224, PEarly DC vs. UDC=0.036, PEarly SRCC vs. UDC=0.024, PAdvanced SRCC vs. DC=0.017, PAdvanced DC vs. UDC <0.001, PAdvanced SRCC vs. UDC=0.580.