Table 4.
Analysis-of-deviance tables (Type III test) from generalized linear model (GLM) and generalized linear mixed model (GLMM) investigating the two methods (MALDI-TOF MS, qPCR) for detecting eight hbs-LAB that were available for both (see text). The number of different hbs-LAB detected (M6) and the relationship of detecting a hbs-LAB or not finding it (M7) were compared. Non-significant terms (italicized) were removed stepwise from the final model starting from the bottom row. “/” means latter random factor is nested within former random factor
| Model | Model type | Random factor | Response variable | Explanatory variables | Χ2 | Df | AIC | P value |
|---|---|---|---|---|---|---|---|---|
| M6 | GLMM (Poisson) |
Day/ Colony |
Number of strains detected | Method | 112.6 | 1 | 2241.8 | < 0.001 |
| Quarantine status | 23.8 | 1 | < 0.001 | |||||
| Treatment | 4.4 | 1 | 0.03 | |||||
| Method × Treatment | 4.0 | 1 | 0.04 | |||||
| Method × Quarantine status | 0.0 | 1 | 2243.8 | 0.95 | ||||
| Treatment × Quarantine status | 0.2 | 1 | 2245.6 | 0.62 | ||||
| Method × Treatment × Quarantine status | 0.9 | 1 | 2246.7 | 0.33 | ||||
| M7 | GLM (binomial) | – | Strain detection probability (failures, successes) | Strain | 206.7 | 7 | 123.9 | < 0.001 |
| Method | 44.0 | 1 | < 0.001 | |||||
| Strain × Method | 140.4 | 7 | < 0.001 |