
Preelimination phase^{a}

Elimination phase^{a}

Interaction^{c} (P value)


IRR^{b}

CI

P value

IRR

CI

P value


Total cases

0.919

0.917

0.922

0.0001

0.738

0.727

0.750

0.0001

0.0001

P. vivax

0.938

0.936

0.940

0.0001

0.739

0.727

0.751

0.0001

0.0001

P. falciparum

0.800

0.795

0.806

0.0001

0.735

0.708

0.764

0.0001

0.0001

Autochthonous^{d}

0.924

0.922

0.927

0.0001

0.645

0.630

0.661

0.0001

0.0001

Imported

0.907

0.903

0.912

0.0001

0.817

0.800

0.833

0.0001

0.0001

Iranian

0.943

0.940

0.945

0.0001

0.734

0.719

0.749

0.0001

0.0001

NonIranian

0.823

0.818

0.827

0.0001

0.744

0.726

0.762

0.0001

0.0001


^{a}Preelimination phase: 2001–2009; Elimination phase: 2010–2015

^{b}Incidence Rate Ratio for the linear effects of time (year), which indicates that how much malaria incidence of a certain year has changed compared to the previous year, on average. A value of 1 indicates that the incidence has remained roughly constant, and values less than 1 indicate a declining trend in the incidence; the more this value grows smaller, the higher will be the decline rate

^{c}Interaction between phase and year; the small Pvalue (less than 0.05) of this coefficient indicates the significant difference of the risk ratio of annual incidence decline in the preelimination to the elimination phase, it can, therefore, be concluded that for all the compared groups, the speed of annual decline rate in the elimination phase was significantly higher than the previous phase

^{d}Local malaria transmission in the endemic counties