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Title: Alcohol intake and renal cell cancer in a pooled analysis of 12 prospective studies.
Authors: Lee JE,  Hunter DJ,  Spiegelman D,  Adami HO,  Albanes D,  Bernstein L,  van den Brandt PA,  Buring JE,  Cho E,  Folsom AR,  Freudenheim JL,  Giovannucci E,  Graham S,  Horn-Ross PL,  Leitzmann MF,  McCullough ML,  Miller AB,  Parker AS,  Rodriguez C,  Rohan TE,  Schatzkin A,  Schouten LJ,  Virtanen M,  Willett WC,  Wolk A,  Zhang SM,  Smith-Warner SA
Journal: J Natl Cancer Inst
Date: 2007 May 16
Branches: MEB
PubMed ID: 17505075
PMC ID: not available
Abstract: BACKGROUND: The association between alcohol intake and risk of renal cell cancer has been inconsistent in case-control studies. An inverse association between alcohol intake and risk of renal cell cancer has been suggested in a few prospective studies, but each of these studies included a small number of cases. METHODS: We performed a pooled analysis of 12 prospective studies that included 530,469 women and 229,575 men with maximum follow-up times of 7-20 years. All participants had completed a validated food-frequency questionnaire at baseline. Using the primary data from each study, the study-specific relative risks (RRs) for renal cell cancer were calculated using Cox proportional hazards models and then pooled using a random-effects model. All statistical tests were two-sided. RESULTS: A total of 1430 (711 women and 719 men) cases of incident renal cell cancer were identified. The study-standardized incidence rates of renal cell cancer were 23 per 100,000 person-years among nondrinkers and 15 per 100,000 person-years among those who drank 15 g/day or more of alcohol. Compared with nondrinking, alcohol consumption (> or = 15 g/day, equivalent to slightly more than one alcoholic drink per day) was associated with a decreased risk of renal cell cancer (pooled multivariable RR = 0.72, 95% confidence interval = 0.60 to 0.86; P(trend)<.001); statistically significant inverse trends with increasing intake were seen in both women and men. No difference by sex was observed (P(heterogeneity) = .89). Associations between alcohol intake and renal cell cancer were not statistically different across alcoholic beverage type (beer versus wine versus liquor) (P = .40). CONCLUSION: Moderate alcohol consumption was associated with a lower risk of renal cell cancer among both women and men in this pooled analysis.