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. 2020 Feb 3;20:89. doi: 10.1186/s12885-020-6555-7

Table 3.

Multivariable analysis of prognostic factors for III-IVb NPC patients

Hazard ratio* (95% CI) P value
Progression-free survival
 Age (y) (≥ 45 vs. <  45) 1.543(1.100–2.164) 0.012
 Gender(F vs. M) 1.055(0.814–1.366) 0.686
 T category (3–4 vs. 1–2) 1.280(0.846–1.937) 0. 242
 N category (2–3 vs. 0–1) 1.357(0.977–1.886) 0.069
 Overall stage (IVa-b vs. III) 1.487(1.133–1.951) 0.004
 EBV DNA 1.579(1.151–2.164) 0.005
 IC regimen; PF vs. TPF 1.189(0.880–1.605) 0.260
 IC regimen; TP vs. TPF 1.630(1.151–2.308) 0.006
Overall survival
 Age (y) (≥ 45 vs. <  45) 0.892(0.510–1.560) 0.688
 Gender(F vs. M) 1.846(1.115–3.055) 0.017
 T category (3–4 vs. 1–2) 0.967(0.475–2.177) 0.927
 N category (2–3 vs. 0–1) 1.161(0.620–2.177) 0.641
 Overall stage (IVa-b vs. III) 1.606(0.950–2.715) 0.077
 EBV DNA 3.881(1.657–9.090) 0.002
 IC regimen; PF vs. TPF 1.604(0.917–2.804) 0.098
 IC regimen; TP vs. TPF 1.571(0.719–3.436) 0.258
Locoregional relapse-free survival
 Age (y) (≥ 45 vs. <  45) 1.525(0.872–2.668) 0.139
 Gender(F vs. M) 0.970(0.631–1.492) 0.891
 T category (3–4 vs. 1–2) 1.189(0.598–2.364) 0.622
 N category (2–3 vs. 0–1) 0.890(0.542–1.462) 0.645
 Overall stage (IVa-b vs. III) 1.240(0.798–1.928) 0.339
 EBV DNA 1.672(0.983–2.843) 0.058
 IC regimen; PF vs. TPF 1.157(0.709–1.887) 0.559
 IC regimen; TP vs. TPF 1.298(0.711–2.369) 0.395
Distant metastasis-free survival
 Age (y) (≥ 45 vs. <  45) 1.592(1.051–2.411) 0.028
 Gender(F vs. M) 0.951(0.694–1.303) 0.756
 T category (3–4 vs. 1–2) 1.428(0.852–2.393) 0.177
 N category (2–3 vs. 0–1) 1.706(1.118–2.606) 0.013
 Overall stage (IVa-b vs. III) 1.488(1.071–2.068) 0.018
 EBV DNA 1.424(0.980–2.069) 0.063
 IC regimen; PF vs. TPF 1.349(0.940–1.936) 0.104
 IC regimen; TP vs. TPF 1.692(1.115–2.569) 0.013

A Cox proportional hazards regression model was used to detect variables individually without adjustment. All variables were transformed into categorical variables. HRs were calculated for age (years) (≥45 vs. < 45), sex (female vs. male), T stage (T3–4 vs. T1–2), N stage (N2–3 vs. N0–1), plasma EBV DNA before the first treatment (≥1500 copies/ml vs. < 1500 copies/ml), overall stage (IVa-b vs. III), and IC regimen (PF vs. TPF, TP vs. TPF)

Abbreviations: CI Confidence interval, EBV Epstein–Barr virus, IC Induction chemotherapy, TPF Taxanes plus cisplatin with fluorouracil, PF Cisplatin with fluorouracil, TP Taxanes with cisplatin