Table 3 Relationship of cancerous length, infiltration depth, and differentiation with lymph node metastasis
Factors | Number of patients (n) | Lymph node metastasis (n, %) | χ2 | P |
|---|---|---|---|---|
Length of cancer | ||||
 < 3 cm | 34 | 9(26.5%) | 11.98 | <0.01 |
 3–7 cm | 113 | 54(47.8%) | ||
 > 7 cm | 32 | 19(59.4%) | ||
Infiltration depth | ||||
 Tis | 8 | 0 | 52.38 | < 0.01 |
 T1 | 60 | 8(13.3%) | ||
 T2 | 43 | 13(30.2%) | ||
 T3 | 33 | 21(63.6%) | ||
 T4 | 35 | 31(88.6%) | ||
Differentiation | ||||
 Well | 10 | 2(20%) | 21.29 | < 0.01 |
 Moderately | 113 | 36(31.9%) | ||
 Low | 56 | 35(62.5%) | ||