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Table 3 Significant predictors of annual WNV Incidence in southern Ontario Public Health Units (PHUs), 2002–2013, based on Poisson modelling of pre-season climate indices

From: Factors associated with human West Nile virus infection in Ontario: a generalized linear mixed modelling approach

Category Variable Relative Risk Confidence Interval
Monthly Mean Minimum Temperature (°C) January 1.08 [1.03, 1.12]
February 1.91 [1.73, 2.12]
March 0.65 [0.60, 0.70]
April 0.48 [0.39, 0.60]
Monthly Mean Precipitation (mm) February 0.97 [0.97,0.98]