Dietary water intake and bladder cancer risk: An Italian case-control study.
Previous studies on the relationship between fluid intake and risk of bladder cancer have generally focused on beverages, and results have been inconsistent. We investigated the relationship between water intake and bladder cancer risk, considering water from both beverages and foods. Between 2003 and 2014 we conducted a multicenter hospital-based case-control study in Italy on 690 cases and 665 frequency-matched controls. Water intake for beverages and foods was computed using the Italian food composition database. Odds ratios (ORs) and the corresponding 95% confidence intervals (95%CIs) for water intake were estimated by unconditional multiple logistic regression models, adjusting for major risk factors for bladder cancer. In the control group, the 64.7% of water intake derived from beverages and 35.4% from foods. Comparing the highest with the lowest quartile of intake, water from beverages (OR=1.14; 95%CI: 0.82-1.59) and water from foods (OR=0.88; 95%CI: 0.61-1.28) were not significantly associated with bladder cancer risk. Some specific water sources showed significant associations with bladder cancer risk (e.g. water from vegetables, OR=0.58; 95%CI: 0.40-0.86). However, these associations may be due to the effect of other components contained in beverages and foods rather than to the water content itself. Considering the intakes of water from both beverages and foods, total water intake was not associated with bladder cancer risk.
Department of Clinical Sciences and Community Health, Branch of Medical Statistics, Biometry and Epidemiology "G.A. Maccacaro", Università degli Studi di Milano, Milan, Italy. Electronic address: matteo.dimaso@unimi.it.
Matteo
M
Di Maso
Department of Epidemiology, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milan, Italy.
Cristina
C
Bosetti
Unit of Cancer Epidemiology, CRO Aviano National Cancer Institute, Aviano, Italy.
Martina
M
Taborelli
Unit of Epidemiology, National Cancer Institute G. Pascale Foundation, Naples, Italy.
Maurizio
M
Montella
Department of Biomedical Sciences, Università di Catania, Catania, Italy.
Massimo
M
Libra
Unit of Cancer Epidemiology, CRO Aviano National Cancer Institute, Aviano, Italy.
Antonella
A
Zucchetto
Department of Medical Statistics, Biometry and Bioinformatics, Fondazione IRCCS Istituto Nazionale Tumori, Milan, Italy.
Federica
F
Turati
Unit of Hygiene and Epidemiology, Department of Biological and Medical Sciences, Università di Udine, Udine, Italy.
Maria
M
Parpinel
Department of Epidemiology, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milan, Italy.
Eva
E
Negri
Department of Epidemiology, IRCCS-Istituto di Ricerche Farmacologiche "Mario Negri", Milan, Italy.
Alessandra
A
Tavani
Unit of Cancer Epidemiology, CRO Aviano National Cancer Institute, Aviano, Italy.
Diego
D
Serraino
Department of Clinical Sciences and Community Health, Branch of Medical Statistics, Biometry and Epidemiology "G.A. Maccacaro", Università degli Studi di Milano, Milan, Italy.
Monica
M
Ferraroni
Department of Clinical Sciences and Community Health, Branch of Medical Statistics, Biometry and Epidemiology "G.A. Maccacaro", Università degli Studi di Milano, Milan, Italy.
Carlo
C
La Vecchia
Unit of Cancer Epidemiology, CRO Aviano National Cancer Institute, Aviano, Italy.
Jerry
J
Polesel
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001628:Beverages / Q000009:adverse effects*; D016022:Case-Control Studies; D004032:Diet / Q000009:adverse effects*; D060766:Drinking Water; D005260:Female; D006801:Humans; D007558:Italy; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D012307:Risk Factors; D001749:Urinary Bladder Neoplasms / Q000209:etiology*; D014874:Water Pollutants, Chemical / Q000009:adverse effects*
D060766:Drinking Water; D014874:Water Pollutants, Chemical
Bladder cancer; Case–control study; Diet; Dietary water intake; Fluids