Fig. 6

Validation for prognostic value of the risk score in different subgroups. A, Subgroup for age ≤ 65; B Subgroup for age > 65; C, Subgroup for Female; D Subgroup for Male; E, Subgroup for AJCC stage I-II; F, Subgroup for AJCC stage III-IV; G, Subgroup for T1 + T2; H, Subgroup for T3 + T4; I, Subgroup for M0; J, Subgroup for M1; K, Subgroup for N0; L, Subgroup for N1 + N2 + N3. Abbreviation: AJCC stage, American Joint Committee on Cancer stage