Associations of mean monthly temperature with inpatient BSI frequencies over all seasons and within seasons.*

BSI = bloodstream infection; CI = confidence interval.*Estimated using Poisson mixed-effects regression models with random intercepts to account for within-site correlation, natural cubic splines (7 degrees of freedom) to control for long-term trends, and adjustments for census region. Linear terms for both total monthly precipitation and mean relative humidity were included.†Model included controls for season.‡Models included season and weather-by-season interaction term.