Variables | Total | OPC (N = 752) | Non-OPC (N = 777) | ||||
---|---|---|---|---|---|---|---|
No. | SPM (N) | % | p* | SPM (N) | % | p* | |
Total patients | 1529 | 42 | 5.6 | Â | 82 | 10.6 | Â |
Age | Â | Â | Â | 0.004 | Â | Â | 0.024 |
  ≤ Median (57 years) | 770 | 12 | 28.6 |  | 33 | 40.2 |  |
  > Median (57 years) | 759 | 30 | 71.4 |  | 49 | 59.8 |  |
Sex | Â | Â | Â | 0.546 | Â | Â | 0.170 |
 Male | 1186 | 35 | 83.3 |  | 62 | 75.6 |  |
 Female | 343 | 7 | 16.7 |  | 20 | 24.4 |  |
Tobacco smoking | Â | Â | Â | 0.010 | Â | Â | 0.037 |
 Ever | 1009 | 22 | 52.4 |  | 69 | 84.1 |  |
 Never | 520 | 20 | 47.6 |  | 13 | 15.9 |  |
Alcohol drinking | Â | Â | Â | 0.813 | Â | Â | 0.005 |
 Ever | 1099 | 30 | 71.4 |  | 69 | 84.1 |  |
 Never | 430 | 12 | 28.6 |  | 13 | 15.9 |  |
Ethnicity | Â | Â | Â | 0.598 | Â | Â | 0.028 |
 Non-Hispanic White | 1333 | 38 | 90.5 |  | 60 | 73.2 |  |
 Other | 196 | 4 | 9.5 |  | 22 | 26.8 |  |
Index cancer stage | Â | Â | Â | 0.240 | Â | Â | 0.035 |
 I or II | 386 | 5 | 11.9 |  | 26 | 31.7 |  |
 III or IV | 1143 | 37 | 88.1 |  | 56 | 68.3 |  |
Treatmenta | Â | Â | Â | 0.511 | Â | Â | 0.111 |
 S only | 253 | 0 | 0.0 |  | 19 | 23.2 |  |
 S/C/X | 335 | 4 | 9.5 |  | 30 | 36.6 |  |
 X/C | 941 | 38 | 90.5 |  | 33 | 40.2 |  |