Hi, thank you so much for explaining this. My question is what is the purpose of doing the retrospective Cohort design to investigate an outbreak when i can do case control study?
Rare vs common disease. If its common disease, then choose Cohort design. If rare, then choose Case Control. That’s one way to answer. But it all depends on what you want to study?
Thanks for the video; I have a query from the field of rehabilitation. Our objective is to find the risk factors of falls in patients who had stroke. Here we identify patients with stroke and ask them their history of falls in last 3 months and we categorise the patients into fallers and non fallers. At the same time we also assess their different factors like balance, fear of falling etc.. to know which of these factors were influencing the falls. Can you mention which design it is.. Case control/retrospective cohort. Upto my understanding it is a case control study
I am involved in a study in which we are collecting data about all patients that have had IPMN. The data we are collecting is about potential risk factors, pathological and imaging characteristics. Then we are going to analys it. But we do not have a control group though. They say it is retrospective but according to you and because we already know the disease, it should not be retrospective. What am I understanding wrong?
so what type of design can i use if i wanted to study the associaton between of antimicrobial resistant strain and diabetic foot ulcer that results to amputation
Depends what you want to study. If you want to study “prevalence” and medication has already been administered then go for cross-sectional study. However, if no medication is administered and you want to administer medication then it is a clinical trial. And you want to see the effects of certain antibiotics then its a clinical trial for sure. So it all depends what you want to achieve. If bacteria is already affecting the limb and you just want to see if amputation will happen then it is a perfect case of cohort study too. Because the population is exposed to bacteria. By the way, case control study is also possible since you already know the outcome “amputation” if you consider amputation as the outcome.
Thanks for this great video. I'm still confused about a current study I'm involved in though. I hope you can help me. If you have a number of patients that you take samples from the lungs of to examine asthma. You find out that a number of them have asthma according to your diagnostive measures and then you investigate if they would be diagnosed differently if you had only taken samples from one lung. What would you call these studies?
Assellamu aleikhum Dr.Hassan thanks, for ur presentation ,but I am still confused a little bit will u clarify more for example exposure to alcohol drinking or cigarette smoking what study will be used here? Thanks
Great explanation! One of the things I might modify with this video is that the stock visuals are unrelated to the topic. The clip of the eye was jarring at best. This video would have done better without them. Also, for visual learners, symbols such as shapes and arrows that are revealed sequentially as the topic is being presented will make them understand the topic better. I'm looking forward to watching more of your videos! This one helped me a lot. Thank you!
Assellamu aleikhum Dr/Hassan I come back again currently I am conducting my research study in substance use during pregnancy &associated factors ,what study design fit to this topic please Dr .thanks again
You want to measure the risk of developing a disease between the exposed and up exposed. Retrospective cohorts also have other advantages over prospective- they’re relatively inexpensive and lower risk of losing people in the study. Prospective studies you need to follow participants for many years making it vulnerable to attrition . So retrospective studies counter that. Also by going back in time , it’s easier to locate a large cohort from past exposure records
Too much sharp sound (at 1.18) freaked me out!!! Be responsible please. This is not a proper way to make videos. Your intro sound is also too high. But still this is a good video. It could be better if you write more on the screen rather than repeating the same thing 10 times. Still, liked this video.
Dr. Tohid explained it very well. He's got a lot to learn about video production but I'm sure he'll do better next time! The repetition might just be his teaching style but I agree with you that more visual aids would be helpful.
Currently taking Epidemiology for Public Health Practice and this cleared things up. Thank you so much!
Dr Hassaan, you are a superstar!!! thanks so much. You are amazing.
Excellant easy to grasp video.Thanks.
Sr. Dermatologist from India.
THANK YOU SIR! I believe I've learned the difference now. You taught it very well, thank you!
very helpful for pharmacy school!! taking an exam on this in an hour. thank you :)
Excellent! I was surprised! Thank you very much!
Omggg thanks finally someone explained it right 👏👏👏👏🔥❤️
So underrated .
Excellent, well done. I will recommend to my students.
very clear sir. i was confused since i started my course in epidemiology
Thank you for watching
very clear Sir, thank you so much. Amazing explanation
Thank you for your clear language and good explanation ❤
Thank you so much. Greetings from India.
Hi, thank you so much for explaining this.
My question is what is the purpose of doing the retrospective Cohort design to investigate an outbreak when i can do case control study?
Rare vs common disease.
If its common disease, then choose Cohort design. If rare, then choose Case Control. That’s one way to answer. But it all depends on what you want to study?
Thanks from Zimbabwe ❤❤❤❤❤❤❤❤
hie dr
Thank u so much it's now completely clear
Thank you so much...if possible, can you give an example of each study after explaining the concept?? Thanks again.
If i don't know the disease so what i'm studying for?
I still confused 🤕
You are finding which disease was developed.
Please which of them is most prone to selection bias
Nice explanation. Thanks from india
You are welcome
does retrospective cohort study has follow up periiod
Thanks for the video; I have a query from the field of rehabilitation.
Our objective is to find the risk factors of falls in patients who had stroke. Here we identify patients with stroke and ask them their history of falls in last 3 months and we categorise the patients into fallers and non fallers. At the same time we also assess their different factors like balance, fear of falling etc.. to know which of these factors were influencing the falls.
Can you mention which design it is..
Case control/retrospective cohort. Upto my understanding it is a case control study
well understandable
Jazakumullah for your video. Im from indonesia 🇮🇩
please do more on study designs
@Hassan Tohid
Thank you for watching
Thank you so much that was very helpful
🙌🙌🙌🙌 thnku sir very clear and easy explanation
Thank you
MashaAllah.... it helped me.
I am involved in a study in which we are collecting data about all patients that have had IPMN. The data we are collecting is about potential risk factors, pathological and imaging characteristics. Then we are going to analys it. But we do not have a control group though.
They say it is retrospective but according to you and because we already know the disease, it should not be retrospective.
What am I understanding wrong?
thank you sir i was confused
Thank you!
excellent explaination of casecontrol and retrospective cohort design
Thank you
Thank youuuu i needed this! It would be great if you can also give some examples so that i can retain this concept in brain
so what type of design can i use if i wanted to study the associaton between of antimicrobial resistant strain and diabetic foot ulcer that results to amputation
Depends what you want to study. If you want to study “prevalence” and medication has already been administered then go for cross-sectional study.
However, if no medication is administered and you want to administer medication then it is a clinical trial. And you want to see the effects of certain antibiotics then its a clinical trial for sure. So it all depends what you want to achieve.
If bacteria is already affecting the limb and you just want to see if amputation will happen then it is a perfect case of cohort study too. Because the population is exposed to bacteria. By the way, case control study is also possible since you already know the outcome “amputation” if you consider amputation as the outcome.
this is so helpful thank you so much!
Keep learning and keep growing
Thank you
Thanks for this great video. I'm still confused about a current study I'm involved in though. I hope you can help me. If you have a number of patients that you take samples from the lungs of to examine asthma. You find out that a number of them have asthma according to your diagnostive measures and then you investigate if they would be diagnosed differently if you had only taken samples from one lung. What would you call these studies?
Sounds like a cross-sectional study
@@HassaanTohid Thank you
Super explanation
Wow that's impressive
Thank you for watching
Assellamu aleikhum Dr.Hassan thanks, for ur presentation ,but I am still confused a little bit will u clarify more for example exposure to alcohol drinking or cigarette smoking what study will be used here? Thanks
Very very clear
Thanks man, you are great.
Hİ Mr. Tohid. To design retrospective liver injury study, patients that died/not dead and to find risk factors, should I use case control study?
Retrospective cohort I believe. But i need more details on your study to say something about it
Great explanation! One of the things I might modify with this video is that the stock visuals are unrelated to the topic. The clip of the eye was jarring at best. This video would have done better without them. Also, for visual learners, symbols such as shapes and arrows that are revealed sequentially as the topic is being presented will make them understand the topic better. I'm looking forward to watching more of your videos! This one helped me a lot. Thank you!
Thank You
haha that damn eye made me jump
Thankyou sir
Too good thnxx a lot
Thank you so much sir
You are welcome Prabhnoor. Keep watching and keep learning. I am bringing more interesting videos
Assellamu aleikhum Dr/Hassan I come back again currently I am conducting my research study in substance use during pregnancy &associated factors ,what study design fit to this topic please
Dr .thanks again
Thanks man... danmn
In the retro cohort if you know the risk factor, what are you going in the for?
You want to measure the risk of developing a disease between the exposed and up exposed. Retrospective cohorts also have other advantages over prospective- they’re relatively inexpensive and lower risk of losing people in the study. Prospective studies you need to follow participants for many years making it vulnerable to attrition . So retrospective studies counter that. Also by going back in time , it’s easier to locate a large cohort from past exposure records
Sir, thank you so much, this was very clear :)
Some suggestion...
Could've used some examples. still my understanding is better than before . Thanks
Just found another video with examples. 😄👍👍
I have the new version of the same topic on my channel. Thank You for your comment.
Let’s say the outbreak on occoured at a school. I want to conduct a retrospective cohort study . It’s a diarrhea outbreak .
we need example, but thank you
❤
Give examples!!
Better if u had given one example
You made me more confused..You must explain with examples not noly repeat same talk!!
How are you confused?
You are confusing me 😊😊
Too much sharp sound (at 1.18) freaked me out!!! Be responsible please. This is not a proper way to make videos. Your intro sound is also too high. But still this is a good video. It could be better if you write more on the screen rather than repeating the same thing 10 times. Still, liked this video.
I am sorry you felt this way. Will make sure next videos are not painful to hear.
Dr. Tohid explained it very well. He's got a lot to learn about video production but I'm sure he'll do better next time! The repetition might just be his teaching style but I agree with you that more visual aids would be helpful.
Thank you!
Thank you