Soil variables from soil study #2 (08 November 2006) were analyzed in generalized linear mixed models to evaluate associations with the presence of B. pseudomallei.

OR is the odds ratio; brackets show 95% confidence intervals of OR values; P-values are shown last and * indicates P-value B. pseudomallei positive (n = 31) or negative (n = 69). Conductivity values were transformed to a natural logarithm (ln) scale. The lower portion of the table shows the results for six binary predictors and reports the percentage of B. pseudomallei positive soil samples (n) out of the total soil samples (ntot) in that category (n/ntot); “ref” is the reference level category. All models (including univariable) had hole as a random effect (intra-cluster correlation 0.4) and depth as a covariate (explanatory variable). Four of the variables were fitted in a multivariable model and the conditional averaged estimates are shown (see Methods for details). Vegetation was excluded from the final multivariable model due to collinearity with grid area (probably due to irrigation of the northern area).