Question

Different measures of disease are useful to evaluate and assess public health programs and needs in different situations. For the following question, (a) state which measure would best support your goal and (b) explain why you chose that measure.
Measures of disease:
I = incidence rate
P = prevalence
L = lifetime prevalence
M = crude mortality rate (crude death rate)
R = sex ratio (counts)
To demonstrate the risks of car-train crashes at railroad crossings without warning signals.

Answer 1

a)The measure used to demostrate the risk of Car - train crashes at railroad crossing without warning signal is L = Lifetime prevalence

Prevalence is defined as the ratio of All the new and Old cases of car train crashes accident during a given time period to that of the total population during the same period.

The prevalence only estimate the number of cases that are admitted due to the car train crash accident. it doesnot include the number of cases before or after the given period

But the Lifetime prevalence estimate the Total number of Cases of car train crashes dealth by each and every person in his lifetime.It will be a more reliable measure to estimate the Risk of car -train crash accident.

Incidence rate is defined as the ratio of number of new cases of car - train accident during a give time period to that of the total population during the given time .It only estimate the New cases.

Crude Mortality Rate is ratio of total number of death due to the car-train chrash accident to the Total population.

It only estimate the number of death cases of Car-Train accident , so it is not a reliable method.

Sex Ratio is used to study Howmuch of male and female are affected due to Car-Train accident. it is also not reliable in estimating the Risk.