2.3. Data analysis
For each food handler that participated in this study, the
knowledge score (KS) was calculated by dividing the sum of correct
answers by the total number of questions. KSs were analysed using
an independent sample t-test (for two groups, such as gender) oranalysis of variance (ANOVA) with post-hoc Duncan test (for more
than two groups, such as age, level of education, experience in food
sector or participation in food safety training.
Additionally, data were analysed to identify knowledge gaps
among food handlers and for that purposes chi-square test was
used to compare the percentage of correct responses to each question across the countries (Serbia, Greece and Portugal). Values
with a p < 0.05 were considered statistically significant. All statistical
processing was performed using Microsoft Excel 2010 and
SPSS Statistics 17.0.