2.5. Statistical analyses
Statistical analyses were performed using the Statistica 6.1
software package (StatSoft Inc., Tulsa, USA). Levels of AFM1 were
expressed in the form of total mean SD, positive mean SD,
range (minemax), percentages of samples in different ranges of
AFM1 concentrations and as the total percentage of samples
exceeding EU MRL. Differences in concentrations between two
samples groups and the differences between seasons were assessed
using the ManneWhitney and KruskaleWallis tests, respectively.
The confidence level required for significance was set at P 0.05.