Folate, vitamin B6, multivitamin supplements, and colorectal cancer risk in women.
Am J Epidemiol
; 163(2): 108-15, 2006 Jan 15.
Article
en En
| MEDLINE
| ID: mdl-16339055
ABSTRACT
The authors evaluated associations between intakes of folate and vitamin B(6) and colorectal cancer risk among women enrolled in a randomized trial on aspirin and vitamin E in disease prevention. At baseline (1992-1995), 37,916 US women aged >or=45 years who were free of cancer and cardiovascular disease provided dietary information. During an average of 10.1 years of follow-up (through February 20, 2004), 220 colorectal adenocarcinoma cases were documented. Total folate and vitamin B(6) intakes were not significantly associated with the risk of colorectal cancer. However, dietary intakes of folate and vitamin B(6) were significantly inversely associated with colorectal cancer risk among women who were not taking supplements containing folate and vitamin B(6). Multivariable relative risks among women in the highest quintiles of intake versus the lowest were 1.16 (95% confidence interval (CI) 0.76, 1.79) for total folate, 1.14 (95% CI 0.77, 1.69) for total vitamin B(6), 0.46 (95% CI 0.26, 0.81) for dietary folate, and 0.69 (95% CI 0.41, 1.15) for dietary vitamin B(6). The use of multivitamin supplements was not related to colorectal cancer risk. These findings suggest that higher dietary intakes of folate and vitamin B(6) may reduce the risk of colorectal cancer in women. An alternative explanation is that other factors related to dietary intakes of folate and vitamin B(6) account for the inverse associations.
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Vitaminas
/
Neoplasias Colorrectales
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Suplementos Dietéticos
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Vitamina B 6
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Ácido Fólico
Tipo de estudio:
Clinical_trials
/
Etiology_studies
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Observational_studies
/
Risk_factors_studies
País/Región como asunto:
America do norte
Idioma:
En
Revista:
Am J Epidemiol
Año:
2006
Tipo del documento:
Article
País de afiliación:
Estados Unidos