West Nile virus infection among the homeless, Houston, Texas.

Emerg Infect Dis · 2007 · PMC2851536 · PMID 18257995

Europe PMC DOI

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a positive trendno p-value reported

There was a positive trend (p value for trend 0.002) between number of hours spent outside and increased risk for WNV infection.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.