I am having difficulty in understanding the concept of Prevalence lately. Cambridge notes on Medical Statistics are not elaborate and I would really appreciate if any one of you can explain it to me.
The Question I am stuck on is related to two drugs: Ecstasy and Mephedrone.
Assume there are only 30 ecstasy related deaths in the UK per annum. If Mephedrone use is 60% as prevalent as ecstasy but half as dangerous, How many Mephedrone related deaths can you expect in the UK.
To my understanding, there is no definitive way to do this question. I haven't been taught any formulae or theory.
Can anyone explain how to tackle these kinds of questions.