Résumé :
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[BDSP. Notice produite par INIST-CNRS GlrIHR0x. Diffusion soumise à autorisation]. To determine whether school milk consumption in childhood decreased the risk of adult colorectal cancer, the authors conducted a national population-based, case-control study of 562 cases and 571 controls. The authors identified new cases of colorectal cancer in 2007 among people aged 30-69 years from the New Zealand Cancer Registry. Controls were randomly selected from the electoral rolls and frequency matched to cases in 5-year age groups. Participation in school milk programs was associated with a reduced odds ratio for colorectal cancer (odds ratio (OR)=0.70,95% confidence interval (CI) : 0.51,0.96). Odds ratios decreased with increasing numbers of bottles of milk drunk compared with no school milk (for 1-799 bottles, OR=1.04,95% CI : 0.66,1.67 ; for 800-1,199 bottles, OR=0.81,95% CI : 0.51,1.29 ; for 1,200-1,599 bottles, OR=0.62,95% CI : 0.41,0.93 ; for 1,600-1,799 bottles, OR=0.57,95% CI : 0.37,0.90 ; and for 1,800 or more bottles, OR=0.62,95% CI : 0.41,0.96). Participation in school milk programs in New Zealand was associated with a 2.1% reduction (95% CI : 0.7,3.5) in the odds ratio for colorectal cancer for every 100 half-pint bottles drunk (1 half-pint bottle=284 mL).
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