Site	Population Size	Positivity Rate (%)	% Localizeda		Testing Interval	Relative Mortality Reduction
a% Localized = T1–3 N0 M0.
			Screened	Control
Minnesota [6,7]	48,000	Unrehydrated: 2.4%	59	53	Annual	33%
		Rehydrated: 9.8%			Biennial	21%
United Kingdom [11]	150,000	Unrehydrated: 2.1%	52	44	Biennial	15%
Denmark [14]	62,000	Unrehydrated: 1.0%	56	48	Biennial	18%
Sweden [1]	27,000	Unrehydrated: 1.9%	65	33		Not available
		Rehydrated: 5.8%

References

1. Kewenter J, Björk S, Haglind E, et al.: Screening and rescreening for colorectal cancer. A controlled trial of fecal occult blood testing in 27,700 subjects. Cancer 62 (3): 645-51, 1988.  [PUBMED Abstract]
   
   
6. Mandel JS, Bond JH, Church TR, et al.: Reducing mortality from colorectal cancer by screening for fecal occult blood. Minnesota Colon Cancer Control Study. N Engl J Med 328 (19): 1365-71, 1993.  [PUBMED Abstract]
   
   
7. Mandel JS, Church TR, Ederer F, et al.: Colorectal cancer mortality: effectiveness of biennial screening for fecal occult blood. J Natl Cancer Inst 91 (5): 434-7, 1999.  [PUBMED Abstract]
   
   
11. Hardcastle JD, Chamberlain JO, Robinson MH, et al.: Randomised controlled trial of faecal-occult-blood screening for colorectal cancer. Lancet 348 (9040): 1472-7, 1996.  [PUBMED Abstract]
    
    
14. Kronborg O, Fenger C, Olsen J, et al.: Randomised study of screening for colorectal cancer with faecal-occult-blood test. Lancet 348 (9040): 1467-71, 1996.  [PUBMED Abstract]