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Table 3. Randomized Controlled Screening Trials: Fecal Occult Blood Testing

Site Population Size  Positivity Rate (%)  % Cancers Localizeda Testing Interval Relative Mortality Reduction 
a% Localized = T1–3 N0 M0.
Screened Control
Minnesota [5,28]48,000Unrehydrated: 2.4%5953Annual33%
Rehydrated: 9.8%Biennial21%
United Kingdom [10]150,000Unrehydrated: 2.1%5244Biennial15%
Denmark [14]62,000Unrehydrated: 1.0%5648Biennial18%
Sweden [29]68,308Unrehydrated: 1.9%525016%
Rehydrated: 5.8%


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