Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
Comment
. 2010 Sep;100(9):1557-8; author reply 1558-9.
doi: 10.2105/AJPH.2010.194621. Epub 2010 Jul 29.

Apparent benefit of water filters may be an artifact of study design

Paul R Hunter
Comment

Apparent benefit of water filters may be an artifact of study design

Paul R Hunter. Am J Public Health. 2010 Sep.
No abstract available

PubMed Disclaimer

Comment on

References

    1. Colford JM, Hilton JF, Wright CC, et al. The Sonoma Water Evaluation Trial: a randomized drinking water intervention trial to reduce gastrointestinal illness in older adults. Am J Public Health. 2009;99(11):1988–1995 - PMC - PubMed
    1. Sibbald B, Roberts C. Understanding controlled trials. Crossover trials. BMJ. 1998;316(7146):1719. - PMC - PubMed
    1. Colford JM, Wade TJ, Sandhu SK, et al. A randomized, controlled trial of in-home drinking water intervention to reduce gastrointestinal illness. Am J Epidemiol. 2005;161:472–482 - PubMed
    1. Swift L, Hunter PR. What do negative associations between potential risk factors and illness in analytical epidemiological studies of infectious disease really mean? Eur J Epidemiol. 2004;19(3):219–223 - PubMed
    1. Frost FJ, Roberts M, Kunde TR, et al. How clean must our drinking water be: the importance of protective immunity. J Infect Dis. 2005;191:809–814 - PubMed

LinkOut - more resources