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Table 4 Mixed effects logistic regression model for 2014 oyster bed surveys

From: Exploring the decline of oyster beds in Atlantic Canada shorelines: potential effects of crab predation on American oysters (Crassostrea virginica)

Fixed effects Coef. SE z value P > |z|
Presence of green crab 2.48 0.89 2.79 0.005
Presence of rock crab 1.36 0.31 4.46 <0.001
Presence of mussel beds −1.45 0.59 −2.48 0.013
Green crab and mussel interaction*     <0.001
Random effect Estimate SE
Estuary 0.56 0.29
Site 0.07 0.067
Probability ≥ chibar2 ≥ 0.001   
  1. Random effects parameters are sites (n = 20) nested within estuaries (n = 10). Green crab, rock crab and mussel variables were included in binary form (presence/absence)
  2. * Overall interaction P value obtained with a Likelihood ratio test (chi2 = 21.3)