The following is true about prevalence and incidence -

Incidence Incidence = No of new cases during a given time period / Population at risk during that period x 100 Numerator (new cases) is a part of denominator (population at risk including those who have developed disease, i.e. the cases). Time period is specified Multiplier is 1000 All are features of rate, so incidence is a rate. Prevalence → Prevalence is proportion.