Odds ration is designated as ?: (A) ab/cd, (B) ac/bd, (C) bd/ac, (D) ad/bc
Answer is D. Ans. is 'd' i.e., ad/bc Odds - ratio (cross product ratio) From a case control study odds ratio can be derived which a measure of the strength of association between risk factor and outcome. Odds ratio is closely related to relative risk (which is analysed in coho study) - odds ratio represents only an estimate of relative risk.