Fluid intake and bladder cancer in UTAH

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Abstract
A population‐based, incident case‐control study was conducted in Utah to assess the relationship between fluid intake and bladder cancer. Cancer cases (n = 419) were identified through the Utah Cancer Registry, and controls (n = 889) were obtained through random digit dialling and the Health Care Financing Administration. After adjustment for cigarette smoking, age, sex, history of diabetes, and history of bladder infections using multiple logistic regression analysis, total fluid intake was not found to be related to bladder cancer development. Specific fluids related to bladder cancer risk were milk intake (OR = 0.64) and caffeinated coffee intake (OR = 1.60). A linear trend for a dose‐response protective effect was observed for milk, while coffee increased risk only when 40 or more cups were consumed per week. Alcohol increased risk only when consumed at high levels (over 3.64 ounces or 103 g per week) by people who never smoked cigarettes (OR = 2.37). Likewise, tea consumption in non‐cigarette smokers increased bladder cancer risk (OR = 2.25). Results from this study suggest that types of fluids consumed may play a role in the development of bladder cancer. Furthermore, it is hypothesized that the dietary components of these beverages may be related to the development of bladder cancer.