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Table 3 Survival outcomes stratified by prognostic factors in overall and disease-free survival of patients treated for gastric cancer with or without adjuvant chemoradiotherapy

From: Adjuvant chemoradiotherapy after d2-lymphadenectomy for gastric cancer: the role of n-ratio in patient selection. results of a single cancer center

Variable No. patients Overall survival P Disease-free survival P
  Surgery only (n=90) Adjuvant CT/RT (n=52) Surgery only Adjuvant CT/RT   Surgery only Surgery CT/RT  
Lymphatic Vessel Invasion
Yes 39 20 43.1% 65.8% 0.198 39.5% 41.7% 0.567
No 51 32 62.3% 76.8% 0.458 61.6% 68.8% 0.735
Perineural Invasion
Yes 47 20 43.7% 62.9% 0.470 40.7% 42.8% 0.787
No 43 32 64.0% 79.2% 0.222 63.1% 71.7% 0.603
Extended resection
Yes 18 8 33.3% 45.0% 0.546 33.3% 37.5% 0.951
No 72 44 59.0% 76.2% 0.219 58.5% 63.4% 0.486
Lymph node metastases
Yes 55 46 40.6% 68.2% 0.023 40.6% 53.7% 0.113
No 35 6 73.4% 100.0% 0.736 73.4% 50.0% 0.716
T-category
T1 4 7 75.0% 66.7% 0.627 75.0% 66.7% 0.627
T2 21 8 70.6% 100.0% 0.096 70.6% 71.4% 0.629
T3 5 6 25.0% 85.7% 0.081 25.0% 83.3% 0.170
T4a 55 30 51.3% 62.0% 0.875 50.1% 52.4% 0.999
T4b 5 1 20.0% 100.0% 0.259 20.0% 0.0% 0.953
N-category
N0 35 5 73.4% 100.0% 0.736 72.4% 100.0% 0.689
N1 14 10 50.0% 80.0% 0.203 50.0% 52.5% 0.674
N2 22 20 46.5% 73.1% 0.140 45.0% 64.3% 0.279
N3a 14 15 32.7% 58.7% 0.340 32.7% 41.7% 0.439
N3b 5 2 16.7% 0.0% 0.758 16.7% 0.0% 0.919
N-category – N-ratio
N0 – NR0 35 5 73.4% 100.0% 0.736 72.4% 100.0% 0.689
N1 – NR1a 5 5 80.0% 75.0% 0.688 80.0% 75.0% 0.688
N1 – NR1b 9 5 37.5% 83.3% 0.106 37.5% 40.0% 0.553
N2 – NR1 8 7 75.0% 83.3% 0.620 75.0% 85.7% 0.656
N2 – NR2 and NR3 14 13 27.8% 67.7% 0.120 26.8% 53.8% 0.251
N3a – NR2 and NR3 14 15 32.7% 58.7% 0.340 32.7% 41.7% 0.439
N3b – NR3 5 2 16.7% 0.0% 0.758 16.7% 0.0% 0.919