| Head-neck cancer cases | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
 | Overall | Subtypes |  |  |  |  |  | ||||
 |  |  |  |  |  | OCCb | OHPCb | LCb | |||
 | Alcohol consumption (grams ethanol/day) | Alcohol consumptionc | Alcohol consumptionc | Alcohol consumptionc | |||||||
 | 0 | >0 to <5 | 5 to <15 | 15 to <30 | ≥30 | 0-15 | >15 | 0-15 | >15 | 0-15 | >15 |
Frequency of cigarette smoking ( N /day) | |||||||||||
Never smokers | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Cases/person time at riskd | 10/8959 | 13/9729 | 7/4245 | 11/1499 | 3/619 | 21/22933 | 8/2118 | 3/22933 | 3/2118 | 6/22933 | 3/2118 |
RR | 1 (ref) | 1.20 | 1.23 | 5.53 | 2.97 | 1 (ref) | 4.16 | 1 (ref) | 10.18 | 1 (ref) | 3.05 |
95% CI |  | 0.52 – 2.75 | 0.46 – 3.29 | 2.27 – 13.49 | 0.78 – 11.40 |  | 1.82 – 9.52 |  | 2.03 – 51.06 |  | 0.72 – 12.92 |
>0 to <20 | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â | Â |
Cases/person time at risk | 21/4194 | 25/6534 | 37/7061 | 40/4814 | 32/2184 | 20/17789 | 18/6998 | 18/17789 | 12/6998 | 44/17789 | 41/6998 |
RR | 1.89 | 1.56 | 2.04 | 2.63 | 3.81 | 0.76 | 1.55 | 4.02 | 5.63 | 2.66 | 4.19 |
95% CI | 0.83 – 4.34 | 0.71 – 3.41 | 0.95 – 4.40 | 1.22 – 5.67 | 1.71 – 8.51 | 0.34 – 1.71 | 0.66 – 3.62 | 1.07 – 15.14 | 1.44 – 22.00 | 1.03 – 6.86 | 1.60 – 11.02 |
≥20 |  |  |  |  |  |  |  |  |  |  |  |
Cases/person time at risk | 18/2102 | 29/2745 | 28/3162 | 41/3648 | 80/2856 | 7/8010 | 36/6504 | 16/8010 | 31/6504 | 52/8010 | 53/6504 |
RR | 2.78 | 3.88 | 2.85 | 3.32 | 8.28 | 0.58 | 3.54 | 7.26 | 16.12 | 5.42 | 5.54 |
95% CI | 1.18 – 6.54 | 1.77 – 8.49 | 1.28 – 6.34 | 1.52 – 7.25 | 3.98 – 17.22 | 0.21 – 1.58 | 1.66 – 7.52 | 1.86 – 28.44 | 4.31 – 60.27 | 2.10 – 13.98 | 2.15 – 14.27 |
P for interactione | Â | Â | Â | Â | 0.03 | Â | 0.10 | Â | 0.09 | Â | 0.19 |