Disease Detectives B/C

[SOnerd]

I've done disease since ~January, and I haven't really ever studied pop growth. I know that the growth of a population can influence the spread of disease because people live in closer quarters, but I don't really know anything else about it. What else should we know about Pop Growth?

[sciolyboy123]

Definetly the math involved with population. I have yet to take a test this year that doesn't have at least one of the following: Incidence Rate, Prevalence Rate, Case-Fatality Rate, Mortality Rate, Natality Rate, etc. Just make sure you know the formulas for basically all pop. growth math problems.

[UTF-8 U+6211 U+662F]

I've done disease since ~January, and I haven't really ever studied pop growth. I know that the growth of a population can influence the spread of disease because people live in closer quarters, but I don't really know anything else about it. What else should we know about Pop Growth?

Different types of pop growth diseases, the problems of pop growth, exposures like asbestos and air pollution, etc.

[JoJoKeKe]

Hello everyone!

I'm competing in Disease Detectives in the National Competition representing Idaho, but I had a question...

Definetly the math involved with population. I have yet to take a test this year that doesn't have at least one of the following: Incidence Rate, Prevalence Rate, Case-Fatality Rate, Mortality Rate, Natality Rate, etc. Just make sure you know the formulas for basically all pop. growth math problems.

I had never learned Incidence Rate, Prevalence Rate, Case-Fatality Rate, Mortality Rate, and Natality Rate. After looking up the formulas and adding them to my reference sheet I had one question: are all these represented in percentages?

If not, could you tell me how I would write them to receive points? Thank you!

[UTF-8 U+6211 U+662F]

Hello everyone!

I'm competing in Disease Detectives in the National Competition representing Idaho, but I had a question...

Definetly the math involved with population. I have yet to take a test this year that doesn't have at least one of the following: Incidence Rate, Prevalence Rate, Case-Fatality Rate, Mortality Rate, Natality Rate, etc. Just make sure you know the formulas for basically all pop. growth math problems.

I had never learned Incidence Rate, Prevalence Rate, Case-Fatality Rate, Mortality Rate, and Natality Rate. After looking up the formulas and adding them to my reference sheet I had one question: are all these represented in percentages?

If not, could you tell me how I would write them to receive points? Thank you!

Most of them are represented in percentages, yes. Why are they called rates?
Besides, I don't think the ES will care if you did/didn't write it in percent form.

[JoJoKeKe]

Thank you! That is what I assumed.

And, just to make sure I have the formulas correct based off of my research, the formulas are:

Incidence Rate:
New cases over a time period / Population at risk during that time period

Prevalence Rate:
(Persons with a given health problem / Population in that time period) x100

Natality Rate:
(Number of births in a population in a time / Total population) x1,000

Mortality Rate:
(Deaths during a time period / size of the population during a time period) x100 or 10,000 (depending)

Case-Fatality Rate:
(Number of Deaths within a given time period / Number of Cases within a given time period) x100
-------------------------

Correct?

[UTF-8 U+6211 U+662F]

Thank you! That is what I assumed.

And, just to make sure I have the formulas correct based off of my research, the formulas are:

Incidence Rate:
New cases over a time period / Population at risk during that time period

Prevalence Rate:
(Persons with a given health problem / Population in that time period) x100

Natality Rate:
(Number of births in a population in a time / Total population) x1,000

Mortality Rate:
(Deaths during a time period / size of the population during a time period) x100 or 10,000 (depending)

Case-Fatality Rate:
(Number of Deaths within a given time period / Number of Cases within a given time period) x100
-------------------------

Correct?

Well, the incidence rate is new cases/population at risk/time period, okay?
Same thing with the CFR: Number of deaths/number of cases/time period

[JoJoKeKe]

Okay, thank you.

One example was that out of 100 cases of Tuberculosis, 40 died. Would you simply not include the time if it was not given? (As the CFR is obviously 40%)

[UTF-8 U+6211 U+662F]

Okay, thank you.

One example was that out of 100 cases of Tuberculosis, 40 died. Would you simply not include the time if it was not given? (As the CFR is obviously 40%)

Yes.

[sciolyboy123]

Thank you! That is what I assumed.

And, just to make sure I have the formulas correct based off of my research, the formulas are:

Incidence Rate:
New cases over a time period / Population at risk during that time period

Prevalence Rate:
(Persons with a given health problem / Population in that time period) x100

Natality Rate:
(Number of births in a population in a time / Total population) x1,000

Mortality Rate:
(Deaths during a time period / size of the population during a time period) x100 or 10,000 (depending)

Case-Fatality Rate:
(Number of Deaths within a given time period / Number of Cases within a given time period) x100
-------------------------

Correct?

Well, the incidence rate is new cases/population at risk/time period, okay?
Same thing with the CFR: Number of deaths/number of cases/time period

NOOOO, Incidence is new cases/total population at risk,
same thing with CFR. Number of deaths/number of cases.