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.
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
0:45 prevalence- how many people have the disease 2:29 increase pravl. 2:43 adds 2:55 p = incidence plus how long water stay in tub(people have disease for how long)
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?)
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
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]
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
This is a great way to look at it! I've never heard of it explained like this!
I have to admit, you are a genuine teacher, you got the gift
Outstanding explanation - you've got a talent for teaching, man!
- grateful student
Wow, Thank you for this very clear video. 9 year later still very valuable !
Thank you!!! the marble analogy was not working for me to remember the definitions later on, but THE BATHTUB. THANK YOU!!!!!!!
Best explanation I've seen so far!! Good job
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!
Great video, teacher linked it for us in lesson and it helped me understand pretty well! Thanks
Thank you for simplifying it so it’s easy to understand
1:17 .. or they can DIE...
Just...wow.
Excellent analogy. Thank you!
Simple and to the point. This sticks!
this just helped me understand my lecture in public health.... awesome video 👍
Very good example! Thank you!
Awesome job on the lecture!!! Wish you were my professor!
Thank you for your explanation!!!
Great explanation. Thank you.
Nice Job! From Afghanistan.
awesome explanation! thank you
Thank you for this!!!
Thank you so much, this helps.
Thaaaannnk you. Im changing careers and am diving into public health and this concept confused me for a long time.
This is very nice information that brushes the dust of old memory. Keep on.
You teach it greatly! I wish you would have solved some epidemiology statistical questions as well. I really help need with them
That's a nice one. Many thanks!
outstanding one !! 😍😊
So good- thank you!
AWESOME video!
awesome explanation!! thank uu!!
Thanks, you made my day ! :)
Thank you!
Great video.
Thank you.
thankyou for this wonderful and insightful video!!!! monkey be wildin and educateted now, thx
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
Nice job done...from india
Killed it on the explanation!
Good explanation, Thanks.
Thank you ❤️
Thanks!
which one we use for forecasting the patient number in future years?incidence or prevalence?
awesome
0:45 prevalence- how many people have the disease
2:29 increase pravl.
2:43 adds
2:55 p = incidence plus how long water stay in tub(people have disease for how long)
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?)
Hi, could you explain the p-value?
You are doing the needful. Teek hai.
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
I didnt know the Joker from the Dark Knight was into epidemiology
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]
informative and kinda funny
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.
Nice vedio
Plzz give me right option of this
Epidemiology is used used to determine the...............Of a condition.
A. Prevalence
B. Incidence
C. Both
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.
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
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! ^^
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