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What is The ratio between incidence among exposed and nonexposed persons is called- and explain in detail?
.relative risk also called as risk ratio ,is the ratio of the incidence of the disease or death among exposed and incidence among non exposed.it is a direst measure of strength of association between suspected cause and effect.RR of one indicates no association,it must also be noted that risk does not necessarily imply causal association ref:park&;s textbook,ed22,pg no 75