Are coffee and tea consumption associated with urinary tract cancer risk? A systematic review and meta-analysis

Zeegers, Maurice P.; Tan, Fu-Qing; Goldbohm, R.A.; Brandt, Piet A. van den

doi:10.1093/ije/30.2.353

Cited by 69 publications

(51 citation statements)

References 68 publications

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“…These study characteristics were used to evaluate sources of variation in effect estimates. All articles were independently scored by three reviewers (AJ, MZ, EF) similar to an earlier approach [28]. Disagreements were solved in consensus meetings.…”

Section: Methodsmentioning

confidence: 99%

Gly972Arg variant in the insulin receptor substrate-1 gene and association with Type 2 diabetes: a meta-analysis of 27 studies

et al. 2003

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Aims/hypothesis. Several case-control studies have examined the association between the Gly972Arg variant in the IRS-1 gene and Type 2 diabetes, but most had limited power and results could therefore be conflicting. Methods. We systematically reviewed the literature by means of a meta-analysis and investigated sources of heterogeneity in results of different studies.Results. The summary risk ratio, based on 3408 cases and 5419 control cases from 27 studies, was 1.25 (95% CI 1.05-1.48). The results, however, differed according to the type of study, method of verifying non-diabetic status of the control subjects, and age of the case subjects. Population-based studies reported lower odds ratios than hospital-based studies (OR 0.98, 95% CI 0.74-1.30 vs OR 1.43, 95% CI 1.17-1.74). Also, the diagnostic test to exclude diabetes amongst control subjects interacted with the association between the IRS-1 Gly972Arg variant and Type 2 diabetes (p=0.03). Finally, the odds ratio reduced with increasing age (p=0.03). Conclusion/interpretation. Overall, carriers of the 972Arg variant of the IRS-1 gene are at a 25% increased risk of having Type 2 diabetes compared with non-carriers. The odds ratios are generally higher in hospital-based studies, including relatively young, symptomatic, cases. [Diabetologia (2003) 46:990-995]

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Section: Methodsmentioning

confidence: 99%

Gly972Arg variant in the insulin receptor substrate-1 gene and association with Type 2 diabetes: a meta-analysis of 27 studies

et al. 2003

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“…Coffee consumption and cancer of the urinary track was systematically reviewed in 2001 (48). The authors incorporated data on adjusted summary ORs from 16 studies on men and 12 on women.…”

Section: Bladder Cancermentioning

confidence: 99%

Epidemiologic Evidence on Coffee and Cancer

Arab

2010

Nutrition and Cancer

107

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Coffee consumption is a major and frequent dietary exposure in diverse cultures around the globe whose safety has been questioned. A substantial body of epidemiologic evidence, consisting of over 500 papers relating the consumption of coffee to cancer of various sites, has accumulated to date. Numerous individual, site-specific meta analyses have been undertaken at various times. However, there is no comprehensive, up-to-date overview of the entirety of the knowledge base. To address this need, this review summarized the findings of the meta analyses and recent papers on site-specific human cancers among coffee consumers. For hepatocellular and endometrial cancers, there appears to be a strong and consistent protective association; for colorectal cancer, the direction of association is borderline protective. There appears to be no association with breast, pancreatic, kidney, ovarian, prostate, or gastric cancer. Risk of bladder cancer appears to be associated with heavy coffee consumption in some populations and among men. The associations with childhood leukemia and mother's consumption of coffee were ambiguous-with some suggestion of risk at high levels of daily consumption.

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“…On the basis of currently available evidence, coffee consumption probably has no relationship with the risk of pancreatic, ovarian, renal, thyroid or prostate cancer. However, seven reviews located on urinary tract or bladder cancer reported possible slight increased risks with coffee consumption (12,13,(21)(22)(23)(24)(25) . While two systematic reviews calculated increased risks of approximately 20 % (23) and 26 % (25) , a European-based review found an increased risk only for drinkers of 10 cups or more per d (22) .…”

Section: Cancersmentioning

confidence: 99%

Tea or coffee? A case study on evidence for dietary advice

Binns

Lee

Fraser

2008

Public Health Nutr.

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The present paper explores the level of evidence required to justify giving dietary advice to the public. There are important practical differences between the development of public health nutrition guidelines and guidelines for clinical practice. While the gold standard for evidence for clinical practice guidelines is a meta-analysis of a number of randomised controlled trials, this is often unrealistic and sometimes unethical for the evaluation of public health nutrition interventions. Hence, epidemiological studies make up the bulk of evidence for nutrition guidelines. Tea and coffee are an interesting case study in relation to this issue. They are two of the most commonly consumed beverages worldwide, yet there is little dietary advice on their use. The evidence for a relationship between coffee or tea consumption and several diseases is discussed. The available studies, predominantly epidemiological, together with animal and in vitro studies, indicate that coffee and tea are both safe beverages. However, tea is the healthier option because it has a possible role in the prevention of several cancers and CVD. While the evidence for such relationships is not strong, the public will continue to drink both tea and coffee, and will continue to ask nutritionists to make recommendations. It is therefore argued that advice should be given on the best available data, as waiting for complete data to become available could have severe consequences for public health.

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Are coffee and tea consumption associated with urinary tract cancer risk? A systematic review and meta-analysis

Abstract: In accordance with earlier reviews, we found that coffee consumption increases the risk of urinary tract cancer by approximately 20%. The consumption of tea seems not to be related to an increased risk of urinary tract cancer.

Cited by 69 publications

References 68 publications

Gly972Arg variant in the insulin receptor substrate-1 gene and association with Type 2 diabetes: a meta-analysis of 27 studies

Gly972Arg variant in the insulin receptor substrate-1 gene and association with Type 2 diabetes: a meta-analysis of 27 studies

Epidemiologic Evidence on Coffee and Cancer

Tea or coffee? A case study on evidence for dietary advice

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