Relative risk formula(2018): (A) Incidence of disease among non-exposed divided By Incidence of disease among exposed, (B) Incidence of disease among non-exposed minus Incidence of disease among exposed, (C) Incidence of disease among exposed divided by Incidence of disease among non-exposed, (D) Incidence of disease among exposed minus Incidence of disease among non-exposed
Answer is C. Estimation of disease risk associated with exposure is obtained by an index known as "Relative Risk" (RR) or '"risk ratio" , which is defined as the ratio between the incidence of disease among exposed persons and incidence among non-exposed. It is given by the formula: Incidence among exposed/ incidence among non exposed. Ref:- park; pg num :- 81