Dairy Intake and the Risk of Bladder Cancer in the Netherlands Cohort Study on Diet and Cancer

Andras P. Keszei*, Leo J. Schouten, R. Alexandra (Sandra) Goldbohm, Piet A. van den Brandt

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


The authors examined the association between the intake of different dairy products and the risk of bladder cancer in 120,852 men and women aged 55-69 years participating in the Netherlands Cohort Study on Diet and Cancer. Dairy product intake was assessed in 1986 by using a 150-item food frequency questionnaire. The cohort was followed for 16.3 years, and 1,549 incident cases of bladder cancer were analyzed. Cox proportional hazards analysis was applied with a case-cohort approach by using the follow-up data of a random subcohort (n = 5,000). Multivariate hazard ratio estimates comparing the highest with the lowest quintile of total dairy intake were 1.01 (95% confidence interval (CI): 0.81, 1.27; P(trend) = 0.68). A statistically significant association for fermented milk products was found only for the second quintile (median, 12 g/day) (hazard ratio = 0.71, 95% CI: 0.56, 0.91). Compared with nonconsumers, women with 25-75 g/day of butter consumption had a hazard ratio of 1.61 (95% CI: 1.03, 2.50; P(trend) <0.01). No association was found with cheese, calcium, lactose, or nonfermented dairy intake. These results provide weak evidence that bladder cancer risk is inversely associated with low intake of fermented dairy products and suggest a positive association with butter intake in women.
Original languageEnglish
Pages (from-to)436-446
JournalAmerican Journal of Epidemiology
Issue number4
Publication statusPublished - 15 Feb 2010


  • butter
  • cohort studies
  • cultured milk products
  • dairy products
  • urinary bladder neoplasms


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