Table 4. Correlates with patient characteristics.
| Patient characteristic/statistical test | Virus | p16 | EGFR |
|---|---|---|---|
| Age/PC | NC | NC | NC |
| Gender/CS | NC | NC | NC |
| Long-term survival/LH | Univar: longer survival if HPV positive (P=0.00619). Multivar: longer survival if HPV positive or ‘any virus detected' (P=0.04075 and 0.01618). Shorter survival if Y73SV or HBV (P=0.01335 and 0.00543). | Multivar: longer survival if p16 positive (P=0.02391) | NC |
| Prior cancer/CS | STLV-6 more likely (P=0.0444) | NC | NC |
| Smoking status/CS Never-smoker Former smoker Current smoker | Y73SV higher proportion in never-smokers (P=0.02368). | Higher in current smokers (P=0.01378) | NC |
| Pack-years/PC | STLV-6 more likely present in the greater number of pack-years (P=0.03730). | NC | NC |
| Tissue storage time/PC | Longer the storage, the less likely to find BLV and STLV-6 (P=0.028001 and 0.010301). | NC | NC |
Abbreviations: BLV=bovine leukemia virus; CS=χ2-test; HPV=human papillomavirus; HBV=hepatitis B virus; LH=log hazard ratio; Multivar=multivariable; NC=no correlation; PC=Pearson coefficient test; STLV-6=Simian T-cell leukemia virus-6; Univar=univariable; Y73SV=Y73 sarcoma virus.