What is the denominator in calculation of incidence -: (A) Number of fresh cases, (B) Number of symptomatic cases, (C) Total number of cases, (D) Population at risk
Answer is D. Incidence is defined as new cases occurring in a defined population during a specified period of time. Incidence =(number of new cases of specific disease in a given time proof\population at risk during that period) 100 (refer pgno:60 park 23 rd edition)