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Volume 8, Number 6—June 2002

Research

Drought-Induced Amplification of Saint Louis encephalitis virus, Florida

Jeffrey Shaman*Comments to Author , Jonathan F. Day†, and Marc Stieglitz*
Author affiliations: *Columbia University, New York, New York, USA; †University of Florida, Vero Beach, Florida, USA;

Main Article

Table 2

Best fit results of the bivariate logistic regression analysis, Floridaa

Bivariate Best Fits
Site Antecedent WTD
(wks) Coincident WTD
(wks) Whole model fit 
p value Intercept Antecedent slope Antecedent
slope
p value Coincident slope Coincident
slope
p value
Site 1 12 1 0.0001 29.49 26.80 0.0005 -8.98 0.0085
Site 2 16 2 0.0001 17.83 14.13 0.0008 -3.62 0.068
Site 3 17 2 0.0001 22.11 18.64 0.0001 -5.26 0.0071
Site 4 15 1 0.0001 28.92 24.63 0.0011 -7.26 0.0096
Site 5 15 2 0.0001 21.60 23.19 0.0002 -11.37 0.0012
All five sites 17 2 0.0001 19.03 18.06 0.0001 -6.21 0.0005

aThe probability of SLEV transmission incidence is represented as a function of two time lags of weekly averaged modeled water table depth (WTD). Whole model goodness-of-fit and individual parameter estimates were assessed as per the univariate analysis.

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