General linear mixed models testing fixed and random predictors of recovery of P. putida group strains, P. fluorescens group strains, and their relative recovery, in spring (top) and fall (bottom) sampling periods.

a models recovery of P. putida group. One house excluded in spring model.b models recovery of P. fluorescens group. Two houses excluded in spring and three houses in fall.c models recovery of P. putida group vs. P. fluorescens group, given that one of the two was recovered, for spring and fall.na indicates that this term was excluded from the model due to failure to converge of the more complex modelǂ DF indicates degrees of freedom; denominator DF for F test is estimated using the Residual DF method.§ The fixed effects are tested with an approximate F test. The random effects are tested using Wald Z tests.# The effect of season is tested using a joint test for the six pairwise comparisons among seasons, using linear combinations of the least squares meansNS p>0.1+ 0.05* 0.01** 0.001*** pGeneral linear mixed models testing fixed and random predictors of recovery of P. putida group strains, P. fluorescens group strains, and their relative recovery, in spring (top) and fall (bottom) sampling periods.