Spatial epidemiology of porcine reproductive and respiratory syndrome in Thailand.

BMC Vet Res · 2014 · PMC4236821 · PMID 25091559

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an overall trendno p-value reported

First, a linear regression was carried out with the number of daily records as a dependent variable and the day number (since the first observation day) as an explanatory variable such as to quantify the presence of an overall trend.

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