Volume 21, Number 10—October 2015
Environmental Factors Related to Fungal Wound Contamination after Combat Trauma in Afghanistan, 2009–2011
|Environmental factor||Univariable OR (95% CI)||p value†||Multivariable OR (95% CI)||p value‡|
|NDVI§||0.93 (0.49–1.77)||0.89||1.16 (0.58–2.33)||0.68|
|Elevation||1.00 (0.99–1.00)||0.11||1.00 (1.00–1.01)||0.61|
|Annual precipitation¶||0.99 (0.99–1.00)||0.01||−||−|
|Annual mean temperature||1.09 (0.95–1.24)||0.22||0.84 (0.42–1.67)||0.61|
|Temperature annual range
|*OR, odds ratio; NDVI, normalized difference vegetation index. †For univariable analysis. ‡For multivariable analysis. §The NDVI uses a mathematical formula to quantify the density of healthy green vegetation in a region (25,26). The NDVI values were normalized by taking the natural log of the index. ¶Because of its high correlation with the temperature variables, annual precipitation was not included in the final multivariable model. #The wide CI is due to correlation between the regional and the environmental variables.|
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