Skip to main content

Table 5 Comparison of GEE1 fitted models using QIC2 statistic

From: Factors associated with whole carcass condemnation rates in provincially-inspected abattoirs in Ontario 2001-2007: implications for food animal syndromic surveillance

Model

Correlation Structure

QIC

Negative binomial GEE2

Exchangeable

11328

 

Non-stationary

11626

 

2nd order autoregressive

11647

 

Stationary

11664

 

1st order autoregressive

11668

Poisson GEE2

2nd order autoregressive

12007

 

Stationary

12056

 

1st order autoregressive

12409

 

Exchangeable

13605

 

Non-stationary

Did not converge

  1. 1Generalized estimating equation
  2. 2Quasi-log- likelihood under the independence model information criterion
  3. Comparison of QIC2 statistic values for negative binomial or Poisson models using a GEE1 approach to investigate the association between condemnation rates in Ontario Provincial abattoirs and year, season, animal class, price, year-animal class interaction and audit rating.