Esophageal cancer
1 = case
2 = control

Age Group
1 = 25-34
2 = 35-44
3 = 45-55
4 = 55-64
5 = 65-74
6 = 75+

Alcohol consumption
1 = 0 - 39 gm/day
2 = 40 - 79 gm/day
3 = 80 - 119 gm/day
4 = 120+ gm/day

Tobacco consumption
1 = 0-9 gms/day
2 = 10-19 gms/day
3 = 20-29 gms/day
4 = 30+ gms/day

Alcohol dichotomized
1 = 80+ gms/day
2 = 0-79 gms/day

1 = 20+ gms/day
2 = 1-19 gms/day