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Population Versus Hospital Controls in the Assessment of Dietary Intake of Isoflavone for Case-Control Studies on Cancers in China
Nutrition and Cancer
5 To assess dietary isoflavone intake between population and hospital outpatient controls and examine if cancer risks estimated for isoflavone using hospital outpatient controls would be different from those using population controls. Three parallel case-control 10 studies on leukemia, breast, and colorectal cancers in China in 2009-2010 were conducted, using population and hospital outpatient controls to separately match 560 incident cases at a 1:1 ratio. A validated food frequencydoi:10.1080/01635581.2013.767915 pmid:23530638 fatcat:h4u7unslwrh6zcnc4cehsshx2m