If the P-value is less than 0.05 it can be concluded that there is a statistical significant difference between the two rates. The difference between the two rates R2-R1 with its 95% Confidence Interval and associated P-value.The (incidence) rate in the two groups with their Poisson 95% Confidence Interval.the rate 10/200 equals 0.05 and can be represented as 1:20. Option Express result as 1:X: when this option is selected the rate R will be displayed as 1:(1/R), e.g.Denominator: for example the total person-years for each group.
Numerator: the observed number of events in each group.This form allows to compare the rates in two groups. A rate is a ratio between a count and another measurement, for example the ratio of a number of events observed and the total number of person-years of observation.
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