| PNRT |  | |||
---|---|---|---|---|---|
 | No N=15,122 | Yes N=772 |  | ||
Variable | n | % | n | % | p value |
Men | 12,629 | 83.5 | 689 | 89.3 | < 0.0001 |
Age (years) | Â | Â | Â | Â | < 0.0001 |
  < 50 | 7635 | 50.5 | 238 | 30.8 |  |
  50~64 | 5320 | 35.2 | 287 | 37.2 |  |
  ≥ 65 | 2167 | 14.3 | 247 | 32.0 |  |
  Mean (SD) | 51.2 | (12.1) | 58.0 | (13.2) | < 0.0001 |
Hospital level | Â | Â | Â | Â | 0.001 |
  Medical center | 9799 | 64.8 | 523 | 67.8 |  |
  Regional hospital | 3475 | 23.0 | 189 | 24.5 |  |
  District hospital / clinic | 1848 | 12.2 | 60 | 7.8 |  |
Treatment | Â | Â | Â | Â | Â |
  Neck lymph node dissection | 3066 | 20.3 | 123 | 15.9 | 0.003 |
  Gastrostomy | 182 | 1.2 | 28 | 3.6 | < 0.0001 |
  Concurrent chemotherapy | 6881 | 45.5 | 354 | 45.9 | 0.85 |
Comorbidity | Â | Â | Â | Â | Â |
  Dementia | 41 | 0.3 | 4 | 0.5 | 0.28†|
  Stroke | 418 | 2.8 | 46 | 6.0 | <0.0001 |
  Parkinson’s disease | 19 | 0.1 | 5 | 0.7 | 0.005†|
  GERD | 664 | 4.4 | 51 | 6.6 | 0.004 |