Table 1 Patient characteristics and univariate analysis of prognostic factors
Variables | Number ofpatients (%) | Mediansurvival (m) | 3-y survivalrate (%) | P |
|---|---|---|---|---|
Age (years) | Â | Â | Â | 0.248 |
 <60 | 105 (29.4%) | 34.0 | 47.8% |  |
 ≥ 60 | 252 (70.6%) | 27.8 | 40.3% |  |
Sex | Â | Â | Â | 0.377 |
 Male | 282 (79.0%) | 28.0 | 41.1% |  |
 Female | 75 (21.0%) | 32.6 | 48.3% |  |
Primary tumor location | Â | Â | Â | <.001 |
 Upper | 168 (47.1%) | 42.0 | 55.7% |  |
 Middle | 132 (37.0%) | 26.0 | 35.4% |  |
 Lower | 57 (15.9%) | 16.0 | 21.1% |  |
T category | Â | Â | Â | <.001 |
 T2 | 76 (21.3%) | 49.0 | 59.2% |  |
 T3 | 217 (60.8%) | 29.0 | 42.2% |  |
 T4 | 64 (17.9%) | 17.5 | 24.3% |  |
No. of LNs | Â | Â | Â | <.001 |
 0 | 94 (26.3%) | 46.0 | 53.3% |  |
 1–2 | 150 (42.0%) | 36.0 | 49.0% |  |
 3–6 | 96 (26.9%) | 18.0 | 27.8% |  |
 ≥ 7 | 17 (4.8%) | 13.0 | 0 |  |
Extent of LNs | Â | Â | Â | <.001 |
 0 | 94 (26.3%) | 46.0 | 53.3% |  |
 1 region | 172 (48.2%) | 31.0 | 45.7% |  |
 2 regions | 76 (21.3%) | 19.0 | 28.0% |  |
 3 regions | 15 (4.2%) | 12.0 | 13.3% |  |
Size of LNs | Â | Â | Â | 0.001 |
 0 | 94 (26.3%) | 46.0 | 53.3% |  |
 ≤ 2 cm | 220 (61.6%) | 28.0 | 41.6% |  |
 >2 cm | 43 (12.1%) | 17.0 | 20.7% |  |
Treatment | Â | Â | Â | 0.010 |
 CRT | 227 (63.6%) | 33.8 | 47.6% |  |
 RT alone | 130 (36.4%) | 25.6 | 33.7% |  |