Table 4. Adjusted HR with 95% CI of squamous oral–oesophageal cancer by daily coffee consumption in the subgroup where questions on alcohol were included.
| 0–4 cups | 5+ cups | P-value | |
|---|---|---|---|
| Cases | 28 | 46 | |
| Pyrs | 648 566 | 704 146 | |
| HRa | Ref | 0.98 | 0.93 |
| 95% CI | — | (0.59, 1.61) | |
| HR with alcohol unitsb | Ref | 0.98 | 0.94 |
| 95% CI | — | (0.59, 1.62) |
Abbreviations: CI=confidence interval; HR=hazard ratios; Pyrs=person years.
a
Adjusted for sex, daily smoking, body mass index and education.
b
Adjusted for sex, daily smoking, body mass index, education and alcohol consumption.