Poisson regression analysis of environmental factors associated with SFTS incidence in Xinyang Region, China, 2011–2012.*

*SFTS = severe fever with thrombocytopenia syndrome;¶NDVI = normalized difference vegetation index;NS, not significant.†For all continuous variables, we also reported categorical results to permit inspection of the data and whether or not the assumption of continuous variables was justified. For categorical variables, the number represented proportion of land cover areas in the township.#Variable that was included into multivariable analysis.§Elevation was removed from the multivariate analysis because of its collinearity with forest (r = 0.89).