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Sökning: WFRF:(Yaun Shiaw Shyuan)

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1.
  • Kim, Dong-Hyun, et al. (författare)
  • Pooled analyses of 13 prospective cohort studies on folate intake and colon cancer
  • 2010
  • Ingår i: Cancer Causes and Control. - : SPRINGER. - 0957-5243 .- 1573-7225. ; 21:11, s. 1919-1930
  • Tidskriftsartikel (refereegranskat)abstract
    • Studies of folate intake and colorectal cancer risk have been inconsistent. We examined the relation with colon cancer risk in a series of 13 prospective studies. Study- and sex-specific relative risks (RRs) were estimated from the primary data using Cox proportional hazards models and then pooled using a random-effects model. Among 725,134 participants, 5,720 incident colon cancers were diagnosed during follow-up. The pooled multivariate RRs (95% confidence interval [CI]) comparing the highest vs. lowest quintile of intake were 0.92 (95% CI 0.84-1.00, p-value, test for between-studies heterogeneity = 0.85) for dietary folate and 0.85 (95% CI 0.77-0.95, p-value, test for between-studies heterogeneity = 0.42) for total folate. Results for total folate intake were similar in analyses using absolute intake cutpoints (pooled multivariate RR = 0.87, 95% CI 0.78-0.98, comparing a parts per thousand yen560 mcg/days vs. < 240 mcg/days, p-value, test for trend = 0.009). When analyzed as a continuous variable, a 2% risk reduction (95% CI 0-3%) was estimated for every 100 mu g/day increase in total folate intake. These data support the hypothesis that higher folate intake is modestly associated with reduced risk of colon cancer.
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2.
  • Mannisto, Satu, et al. (författare)
  • Dietary carotenoids and risk of colorectal cancer in a pooled analysis of 11 cohort studies
  • 2007
  • Ingår i: American Journal of Epidemiology. - Natl Inst Publ Hlth, Dept Hlth Promot & Chron Dis Prevent, Helsinki 00300, Finland. Harvard Univ, Sch Publ Hlth, Boston, MA 02115 USA. Harvard Univ, Sch Med, Brigham & Womens Hosp, Boston, MA 02115 USA. Harvard Univ, Ctr Canc Prevent, Boston, MA 02115 USA. Karolinska Inst, Stockholm, Sweden. NCI, Bethesda, MD 20892 USA. Maastricht Univ, Fac Hlth Sci, Maastricht, Netherlands. Mayo Clin, Coll Med, Rochester, MN USA. SUNY Buffalo, Univ Buffalo, Buffalo, NY 14260 USA. Dana Farber Canc Inst, Boston, MA 02115 USA. TNO Qual Life, Zeist, Netherlands. Univ Minnesota, Sch Publ Hlth, Minneapolis, MN USA. Amer Canc Soc, Atlanta, GA 30329 USA. Univ Toronto, Fac Med, Toronto, ON, Canada. Albert Einstein Coll Med, Bronx, NY 10467 USA. : OXFORD UNIV PRESS INC. - 0002-9262 .- 1476-6256. ; 165:3, s. 246-255
  • Tidskriftsartikel (refereegranskat)abstract
    • Dietary carotenoids have been hypothesized to protect against epithelial cancers. The authors analyzed the associations between intakes of specific carotenoids (alpha-carotene, beta-carotene, beta-cryptoxanthin, lutein + zeaxanthin, and lycopene) and risk of colorectal cancer using the primary data from 11 cohort studies carried out in North America and Europe. Carotenoid intakes were estimated from food frequency questionnaires administered at baseline in each study. During 6-20 years of follow-up between 1980 and 2003, 7,885 incident cases of colorectal cancer were diagnosed among 702,647 participants. The authors calculated study-specific multivariate relative risks and then combined them using a random-effects model. In general, intakes of specific carotenoids were not associated with colorectal cancer risk. The pooled multivariate relative risks of colorectal cancer comparing the highest quintile of intake with the lowest ranged from 0.92 for lutein + zeaxanthin to 1.04 for lycopene; only for lutein + zeaxanthin intake was the result borderline statistically significant (95% confidence interval: 0.84, 1.00). The associations observed were generally similar across studies, for both sexes, and for colon cancer and rectal cancer. These pooled data did not suggest that carotenoids play an important role in the etiology of colorectal cancer.
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3.
  • Smith-Warner, Stephanie A., et al. (författare)
  • Alcohol and breast cancer in women : A pooled analysis of cohort studies
  • 1998
  • Ingår i: Journal of the American Medical Association (JAMA). - 0098-7484 .- 1538-3598. ; 279:7, s. 535-540
  • Tidskriftsartikel (refereegranskat)abstract
    • OBJECTIVE: To assess the risk of invasive breast cancer associated with total and beverage-specific alcohol consumption and to evaluate whether dietary and nondietary factors modify the association. DATA SOURCES: We included in these analyses 6 prospective studies that had at least 200 incident breast cancer cases, assessed long-term intake of food and nutrients, and used a validated diet assessment instrument. The studies were conducted in Canada, the Netherlands, Sweden, and the United States. Alcohol intake was estimated by food frequency questionnaires in each study. The studies included a total of 322647 women evaluated for up to 11 years, including 4335 participants with a diagnosis of incident invasive breast cancer. DATA EXTRACTION: Pooled analysis of primary data using analyses consistent with each study's original design and the random-effects model for the overall pooled analyses. DATA SYNTHESIS: For alcohol intakes less than 60 g/d (reported by >99% of participants), risk increased linearly with increasing intake; the pooled multivariate relative risk for an increment of 10 g/d of alcohol (about 0.75-1 drink) was 1.09 (95% confidence interval [CI], 1.04-1.13; P for heterogeneity among studies, .71). The multivariate-adjusted relative risk for total alcohol intakes of 30 to less than 60 g/d (about 2-5 drinks) vs nondrinkers was 1.41 (95% CI, 1.18-1.69). Limited data suggested that alcohol intakes of at least 60 g/d were not associated with further increased risk. The specific type of alcoholic beverage did not strongly influence risk estimates. The association between alcohol intake and breast cancer was not modified by other factors. CONCLUSIONS: Alcohol consumption is associated with a linear increase in breast cancer incidence in women over the range of consumption reported by most women. Among women who consume alcohol regularly, reducing alcohol consumption is a potential means to reduce breast cancer risk.
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