| Name | Labels | Units | Levels | Storage |
| age | years | integer | ||
| sex | 2 | integer | ||
| smokstat | 3 | integer | ||
| quetelet | Quetelet (weight/(height^2)) | double | ||
| vituse | 3 | integer | ||
| calories | Number of calories consumed per day | double | ||
| fat | Grams of fat consumed per day | double | ||
| fiber | Grams of fiber consumed per day | double | ||
| alcohol | Number of alcoholic drinks consumed per week | double | ||
| cholesterol | Cholesterol consumed (mg per day) | double | ||
| betadiet | Dietary beta-carotene consumed (mcg per day) | integer | ||
| retdiet | Dietary retinol consumed (mcg per day) | integer | ||
| betaplasma | Plasma beta-carotene (ng/ml) | integer | ||
| retplasma | Plasma Retinol (ng/ml) | integer |
| Variable | Levels |
| sex | male |
| female | |
| smokstat | Never |
| Former | |
| Current Smoker | |
| vituse | Yes, fairly often |
| Yes, not often | |
| No |