Epidemiology: Why was it not A or B? What is because prevalence and incidence do

Question

Epidemiology: Why was it not A or B? What is because prevalence and incidence does not count mortality?

8. The incidence of a disease in men is five times that in women, but the prevalence shows no sex difference. Which of the following might explain this association? Describe why each answer is either correct or incorrect. (You should have a sentence or so describing why each possible answer is either correct or incorrect) Already have it- risk of contracting x duration of disease Prevalence (P) = Incidence (I) x duration of disease (D) a. mortality rate is greater in women b. mortality rate is greater in men c. CORRECT: duration of the disease is greater in women: Because Maximum number of women catch the disease(by the higherincidence rate) but number of women have the disease(by the prevalence rate). so after catching the disease, maximum women die from it(by fatality rate) and do not show up in the prevalence

Explanation / Answer

c) If women duration is high, the incidence rate would get converted into fatality rate.

Prevalence formula = I * duration

So, if duration for women is higher than men, then only Prevalence will show no sex difference.

a) Mortality rate has no relation here. Whether the woman lives or dies has no relation to prevalence rate.

b) Same as above.

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