TABLE 2.
Signet Ring Cell Carcinoma (A) | Well and Moderately Differentiated AC (B) | Poorly Differentiated AC (C) | ||||||
Variable | N | % | N | % | P (A vs B) | N | % | P (A vs C) |
AJCC stage | ||||||||
1A | 1019 | 61.9 | 1,981 | 58.2 | 0.024 | 778 | 29.7 | <0.001 |
1B | 124 | 7.5 | 395 | 11.6 | < 0.001 | 274 | 10.5 | 0.003 |
2A | 90 | 5.5 | 263 | 7.7 | 0.006 | 224 | 8.6 | <0.001 |
2B | 101 | 6.1 | 215 | 6.3 | 0.999 | 335 | 12.8 | <0.001 |
3A | 74 | 4.5 | 194 | 5.7 | 0.147 | 243 | 9.3 | <0.001 |
3B | 85 | 5.2 | 177 | 5.2 | 0.999 | 305 | 11.7 | <0.001 |
3C | 153 | 9.3 | 178 | 5.2 | <0.001 | 459 | 17.5 | <0.001 |
Tumor stage | ||||||||
T1a | 766 | 46.5 | 1,081 | 31.8 | <0.001 | 384 | 14.7 | <0.001 |
T1b | 325 | 19.7 | 1,100 | 32.3 | <0.001 | 529 | 20.2 | 0.999 |
T2 | 119 | 7.2 | 408 | 12.0 | <0.001 | 363 | 13.9 | <0.001 |
T3 | 107 | 6.5 | 376 | 11.0 | <0.001 | 380 | 14.5 | <0.001 |
T4a | 318 | 19.3 | 431 | 12.7 | <0.001 | 935 | 35.7 | <0.001 |
T4b | 11 | 0.7 | 7 | 0.2 | 0.019 | 27 | 1.0 | 0.439 |
Node stage | ||||||||
N0 | 1222 | 74.2 | 2438 | 71.6 | 0.105 | 1248 | 47.7 | <0.001 |
N1 | 118 | 7.2 | 406 | 11.9 | <0.001 | 384 | 14.7 | <0.001 |
N2 | 112 | 6.8 | 266 | 7.8 | 0.400 | 389 | 14.9 | <0.001 |
N3a | 105 | 6.4 | 207 | 6.1 | 0.999 | 356 | 13.6 | <0.001 |
N3b | 89 | 5.4 | 86 | 2.5 | <0.001 | 241 | 9.2 | <0.001 |
AJCC indicates American Joint Committee on cancer, 7th edition