From: Colorectal Cancer Screening (PDQ®)
PDQ Cancer Information Summaries [Internet].
Bethesda (MD): National Cancer Institute (US); 2002-.
NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.
Table 3. Randomized Controlled Screening Trials: Fecal Occult Blood Testing
| Site | Population Size | Positivity Rate (%) | % Cancers Localizeda | Testing Interval | Relative Mortality Reduction | |
|---|---|---|---|---|---|---|
| Screened | Control | |||||
| Minnesota [5,28] | 48,000 | Unrehydrated: 2.4% | 59 | 53 | Annual | 33% |
| Rehydrated: 9.8% | Biennial | 21% | ||||
| United Kingdom [10] | 150,000 | Unrehydrated: 2.1% | 52 | 44 | Biennial | 15% |
| Denmark [14] | 62,000 | Unrehydrated: 1.0% | 56 | 48 | Biennial | 18% |
| Sweden [29] | 68,308 | Unrehydrated: 1.9% | 52 | 50 | 16% | |
| Rehydrated: 5.8% | ||||||
a% Localized = T1–3 N0 M0.