Variable | Year | Supplement |
---|---|---|
SNUFF | 1993 | Year 2000 |
SNUFF | 1970 | Person (core questionnaire) |
SNUFFNOW | 1994 | Year 2000 |
SNUFFNOW | 1987 | Cancer epidemiology |
USESNNOW | 1987 | Cancer control |
USNUFFN | 1991 | Health promotion disease prevention |
USNUFNOW | 1992 | Cancer control |