Thanks so much for this! Very clear explanation!! So my professor decides to include this image in his lecture slides but just insisted on explaining it his way, which took over 3 hours, when it could have been explained in less than 4 minutes.
So what is the unit of time for incidence? Is it always agreed to be measured in years? So incidence= the number of new cases of disease in a year? (or is it months or something else?)
Peter, there will be a video on this soon. Here's how I think of p-value. Think of a court case, innocent until proven guilty. All the evidence makes it seem like the defendant is guilty. You are assuming the defendant is innocent. What is the chance that he is innocent AND all that evidence is true. It's possible but unlikely, maybe a 1% chance. That's what the p-value is - how likely is all this evidence true given that the person is innocent. [see next comment]
Hi Rahul, great illustration, thanks a lot! In the pathtub model, there is only one way out (cure or death). I tried to distinguish between people between with and without the disease. Then, two possible exits are necessary. I tried to illustrate this by a "swimming pool model". Best regards, numbergazer
I have a question here 2:07 . How does here prevalence is increasing if someone cures from the disease? Since he is still in the population so isn't it like cure shouldn't have any effect? However, I'm very grateful for the video. Thanks a lot.
He doesn't say prevalence increase if someone gets cured... he says it decreases (Because if someone is cured, they no longer have the disease so prevalence decreases). He does say that if we prevent death (NOT cure), then the prevalence increases because now those pple are living with the disease
Prevalence isn't a rate, it's a single-unit measurement. Incidence is cases per time-unit, prevalence is a snapshot measurement of the number of cases at that time. As a comparison, salary is dollars per hour, savings is a snapshot of what you have in the bank currently.
So we arbitrarily picked a number, 5%. If the probability of all that evidence happening if the person is innocent is less than 5%, then he's probably not innocent. He's guilty. So we reject our initial assumption (innocent until proven guilty) if the p-value (probability that all that evidence is true AND he's innocent) is less than our previously set threshold (5%).
Q for epidemiologist: if vaccination reduces death by this bug in the study (1:53)... that would mean less water leave the tub, but would that also mean less water enters the tub (new infections). [if vaccination does not lower incidences or water level, why bother?] So... with less rate (incidence) & water (infected) in the tub, would vaccination DECREASE prevalence?
I'm not an epidemiologist, but vaccines are typically used to prevent disease (decreasing incidence, decreasing the water coming out of the spout). By that way, it would decrease prevalence. But you make a good point. Some vaccines do give partial immunity (like the flu vaccine when we don't predict the strain right) and so can make the disease less severe when contracted.
It is well explained! but I am taking courses to learn how to teach, and according to them, this is too boring to them. So... apparently I have to make this more fun, I am looking for a more entertaining class, and this is not helping because this is basically how I learn and teach.
Thanks so much for this! Very clear explanation!! So my professor decides to include this image in his lecture slides but just insisted on explaining it his way, which took over 3 hours, when it could have been explained in less than 4 minutes.
Thank you for the explanation ☺
I love Indian channel, they can explain many things in a simple and clear way
I have to admit, you are a genuine teacher, you got the gift
Wow, Thank you for this very clear video. 9 year later still very valuable !
Outstanding explanation - you've got a talent for teaching, man!
- grateful student
Thank you!!! the marble analogy was not working for me to remember the definitions later on, but THE BATHTUB. THANK YOU!!!!!!!
Simple and to the point. This sticks!
this just helped me understand my lecture in public health.... awesome video 👍
This is a great way to look at it! I've never heard of it explained like this!
Thank you for simplifying it so it’s easy to understand
Best explanation I've seen so far!! Good job
1:17 .. or they can DIE...
Just...wow.
Beautiful, beautiful. You've got your self a sub and someone who will be coming back to watch more of your content
Yessss!!! This is explained so nicely. Thanks!
Nice Job! From Afghanistan.
thankyou for this wonderful and insightful video!!!! monkey be wildin and educateted now, thx
Very good example! Thank you!
That's a nice one. Many thanks!
Thank you for this!!!
Nice job done...from india
Excellent analogy. Thank you!
You teach it greatly! I wish you would have solved some epidemiology statistical questions as well. I really help need with them
So good- thank you!
This is very nice information that brushes the dust of old memory. Keep on.
Thaaaannnk you. Im changing careers and am diving into public health and this concept confused me for a long time.
Good explanation, Thanks.
Great explanation. Thank you.
Great video, teacher linked it for us in lesson and it helped me understand pretty well! Thanks
Awesome job on the lecture!!! Wish you were my professor!
I didnt know the Joker from the Dark Knight was into epidemiology
Thank you!
Killed it on the explanation!
So what is the unit of time for incidence? Is it always agreed to be measured in years?
So incidence= the number of new cases of disease in a year? (or is it months or something else?)
Peter, there will be a video on this soon. Here's how I think of p-value. Think of a court case, innocent until proven guilty. All the evidence makes it seem like the defendant is guilty. You are assuming the defendant is innocent. What is the chance that he is innocent AND all that evidence is true. It's possible but unlikely, maybe a 1% chance. That's what the p-value is - how likely is all this evidence true given that the person is innocent. [see next comment]
Hi Rahul,
great illustration, thanks a lot! In the pathtub model, there is only one way out (cure or death). I tried to distinguish between people between with and without the disease. Then, two possible exits are necessary. I tried to illustrate this by a "swimming pool model".
Best regards, numbergazer
I have a question here 2:07 . How does here prevalence is increasing if someone cures from the disease? Since he is still in the population so isn't it like cure shouldn't have any effect?
However, I'm very grateful for the video. Thanks a lot.
He doesn't say prevalence increase if someone gets cured... he says it decreases (Because if someone is cured, they no longer have the disease so prevalence decreases). He does say that if we prevent death (NOT cure), then the prevalence increases because now those pple are living with the disease
which one we use for forecasting the patient number in future years?incidence or prevalence?
awesome explanation! thank you
Thank you so much, this helps.
outstanding one !! 😍😊
Thank you for your explanation!!!
AWESOME video!
Plzz give me right option of this
Epidemiology is used used to determine the...............Of a condition.
A. Prevalence
B. Incidence
C. Both
Thank you ❤️
Great video.
awesome explanation!! thank uu!!
You are doing the needful. Teek hai.
Thanks!
Can the incidence rate be more than the prevalence rate? Thank you for the video.
Prevalence isn't a rate, it's a single-unit measurement.
Incidence is cases per time-unit, prevalence is a snapshot measurement of the number of cases at that time.
As a comparison, salary is dollars per hour, savings is a snapshot of what you have in the bank currently.
Thank you.
awesome
Nice vedio
So we arbitrarily picked a number, 5%. If the probability of all that evidence happening if the person is innocent is less than 5%, then he's probably not innocent. He's guilty. So we reject our initial assumption (innocent until proven guilty) if the p-value (probability that all that evidence is true AND he's innocent) is less than our previously set threshold (5%).
Wow
Thanks, you made my day ! :)
I am confused how do you calculate to find out prevalence?
Number of Cases that exist divided by the number of population in the study.
Q for epidemiologist: if vaccination reduces death by this bug in the study (1:53)... that would mean less water leave the tub, but would that also mean less water enters the tub (new infections). [if vaccination does not lower incidences or water level, why bother?] So... with less rate (incidence) & water (infected) in the tub, would vaccination DECREASE prevalence?
I'm not an epidemiologist, but vaccines are typically used to prevent disease (decreasing incidence, decreasing the water coming out of the spout). By that way, it would decrease prevalence. But you make a good point. Some vaccines do give partial immunity (like the flu vaccine when we don't predict the strain right) and so can make the disease less severe when contracted.
@@oldblueday Oh, so it really depends on what the factors are doing to change the outcome. Thank you and love your videos! ^^
informative and kinda funny
It is well explained! but I am taking courses to learn how to teach, and according to them, this is too boring to them. So... apparently I have to make this more fun, I am looking for a more entertaining class, and this is not helping because this is basically how I learn and teach.
P