2.4. Data analyses
The Campylobacter prevalence for broiler meat is influenced by season
(Boysen et al., 2011). Therefore, the annual mean prevalence for
retail samples was calculated as means of the quarterly prevalences to
account for seasonality. To evaluate whether concentrations were
influenced by season, the difference between quarterly concentrations
(in logs) was tested using an unpaired t-test. An α-value of 0.05 was
considered to be statistically significant in the statistical analyses. Analyses
were performed using the GraphPad QuickCalc software, Inc.