Variable | Pre-PSM Cohort | Post-PSM Cohort | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
No | 1-yr | 2-yr | 3-yr | Statistic value | No | 1-yr | 2-yr | 3-yr | Statistic value | |
Gender | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 Male | 125 | 41.6 | 12.8 | 4.3 | χ2 = 1.804 | 85 | 36.5 | 11.8 | 3.5 | χ2 = 2.153 |
 Female | 58 | 56.9 | 12.4 | 7.8 | P = 0.179 | 33 | 7.6 | 12.1 | 6.1 | P = 0.142 |
Age (years) | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 <60 | 100 | 48.0 | 11.0 | 3.7 | χ2 = 0.009 | 58 | 44.8 | 12.1 | 4.0 | χ2 = 0.295 |
 ≥60 | 83 | 44.6 | 14.9 | 7.4 | P = 0.926 | 60 | 40.0 | 11.7 | 6.7 | P = 0.587 |
Tumor histology | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 Adenocarcinoma | 108 | 52.8 | 14.1 | 6.4 | χ2 = 2.777 | 65 | 41.5 | 12.3 | 6.6 | χ2 = 0.443 |
 Squamous carcinoma | 59 | 37.3 | 10.2 | 5.1 | P = 0.250 | 44 | 40.9 | 9.1 | 4.5 | P = 0.801 |
 others | 16 | 37.5 | 12.5 | 0.0 |  | 9 | 55.6 | 11.1 | 0.0 |  |
Pre-treatment KPS | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 70-80 | 110 | 49.1 | 12.0 | 5.6 | χ2 = 0.255 | 64 | 43.8 | 7.8 | 4.7 | χ2 = 0.001 |
 >80 | 73 | 42.5 | 13.7 | 4.3 | P = 0.614 | 54 | 40.7 | 16.7 | 5.2 | P = 0.976 |
T stage | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 T1-2 | 69 | 50.7 | 11.9 | 5.0 | χ2 = 0.018 | 41 | 39.0 | 9.8 | 4.9 | χ2 = 0.862 |
 T3-4 | 114 | 43.9 | 13.2 | 4.8 | P = 0.914 | 77 | 44.2 | 13.0 | 5.4 | P = 0.353 |
N stage | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 N0-1 | 25 | 68.0 | 21.3 | 11.3 | χ2 = 3.696 | 17 | 64.7 | 17.6 | 17.6 | χ2 = 3.242 |
 N2-3 | 158 | 43.0 | 11.4 | 4.5 | P = 0.055 | 101 | 38.6 | 10.9 | 3.6 | P = 0.072 |
Gross tumor volume, cm3 | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 <146 | 90 | 59.2 | 17.5 | 6.7 | χ2 = 7.319 | 46 | 50.0 | 10.9 | 4.3 | χ2 = 0.618 |
 ≥146 | 93 | 37.6 | 9.7 | 4.2 | P = 0.007 | 72 | 37.5 | 12.5 | 6.2 | P = 0.432 |
Post-treatment KPS | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 Increased or stable | 151 | 52.3 | 14.8 | 5.9 | χ2 = 15.807 | 95 | 47.4 | 13.7 | 5.7 | χ2 = 6.011 |
 Decreased | 32 | 18.8 | 3.1 | 3.1 | P = 0.000 | 23 | 21.7 | 4.3 | 4.3 | P = 0.014 |
Radiation dose, Gy | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 ≥63 | 90 | 51.1 | 21.1 | 11.2 | χ2 = 8.257 | 59 | 47.5 | 20.3 | 10.8 | χ2 = 7.013 |
 <63 | 93 | 41.9 | 6.6 | 0.0 | P = 0.004 | 59 | 37.3 | 3.4 | 0 | P = 0.008 |
Chemotherapy cycles | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 <4 | 95 | 37.9 | 8.7 | 2.5 | χ2 = 5.334 | 60 | 31.7 | 6.7 | 4.4 | χ2 = 3.775 |
 ≥4 | 88 | 55.7 | 1.7 | 8.3 | P = 0.021 | 58 | 53.4 | 17.2 | 6.5 | P = 0.052 |
Metastasis status | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 Single organ | 78 | 46.2 | 16.7 | 8.3 | χ2 = 1.622 | 50 | 46.0 | 18.0 | 8.0 | χ2 = 2.739 |
 2 to 3 organs | 105 | 46.7 | 9.7 | 2.9 | P = 0.203 | 68 | 39.7 | 7.4 | 3.7 | P = 0.098 |
Response to chemotherapy | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
 No | 51 | 25.5 | 7.8 | 3.9 | χ2 = 10.428 | 32 | 21.9 | 6.2 | 3.1 | χ2 = 6.230 |
 Yes | 132 | 54.5 | 14.6 | 5.9 | P = 0.001 | 86 | 50.0 | 14.0 | 6.1 | P = 0.013 |