Characteristics of American Cancer Society Cohorts
| CPS-I | CPS-II Baseline | CPS-II Nutrition | CPS-II LifeLink | |
Study Design |
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Study participants |
1,000,000 | 1,200,000 | 184,000 | 40,000 |
Volunteer recruiters |
68,000 | 77,000 | 7,000 | 2,000 |
Years of follow-up |
1959-1972 | 1982 - ongoing | 1992 - ongoing | 1998 - ongoing |
Number of States |
25 | 50 | 21 | 20 |
Demographics |
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| Women (%) | 57 | 57 | 53 | 56 |
| White (%) | 97 | 93 | 97 | 97 |
| Black (%) | 2 | 4 | 1 | 1 |
| Married (%) | 85 | 83 | 88 | - |
| College Graduate (%) | 17 | 30 | 38 | 50 |
| Age at entry (median) | 52 | 57 | 63 | 69 |
| (range) | 30-108 | 30-111 | 40-92 | 48-95 |
Exposures |
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| Prevalent Cancer (%) | 3 | 7 | 12 | 13 |
| Current cigarette smoker (%) | 29 | 20 | 7 | 5 |
| Current alcohol drinker (%) | 33 | 42 | 57 | 68 |
| Current hormone use (%) | - | 15 | 31 | 52 |