Table 4. Prevalence rate ratio of VRE colonization by monthly meteorological variables, and latitude among 24,468 ICU patients across 20 US sites, September 2011 to October 2012.
| Variable | Model 1* | Model 2 ** | ||
|---|---|---|---|---|
| Prevalence Rate Ratio | P value | Prevalence Rate Ratio | P value | |
| Mean temperature (°F) | 0.996 | 0.173 | - | - |
| Relative humidity (%) | 1.008 | 0.064 | 1.010 | 0.008 |
| Total precipitation (Inches) | 1.009 | 0.660 | - | - |
| Latitude (°) | - | - | 1.018 | 0.019 |
*Multivariate model included the following variables: mean temperature, relative humidity, and total precipitation.
** Multivariate model included the following variables: latitude and relative humidity.