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Figure 2. A) Framework to compare Salmonella enterica serovar
Enteritidis incidence for a given year to the baseline incidence for evidence
of intervention effectiveness. Each arrow shows the change of S.
Enteritidis incidence for a given year, relative to baseline incidence.
The letter a shows increasing S. Enteritidis incidence relative
to the baseline incidence, b shows a reduction in S. Enteritidis
incidence relative to the baseline incidence, c shows a smaller
reduction, d shows no change, and e shows an increase. B)
Framework to compare annualized changes in S. Enteritidis incidence
for a given year to a baseline incidence for evidence of effectiveness
of an intervention. Each dot represents an annualized change in S.
Enteritidis incidence relative to the baseline change in S. Enteritidis
incidence, which is 0%. The letter a shows preintervention annualized
changes in S. Enteritidis incidence that are above the baseline,
indicating annual increase in incidence; b shows postintervention
annualized changes in S. Enteritidis incidence that are below the
baseline; and preintervention rates indicating annual decrease in incidence;
c are above baseline but below preintervention rates; d
are above baseline but equal to preintervention rates; and e are
above preintervention and baseline rates.
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