Epidemiological Studies: A Beginners guide
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- Опубліковано 8 чер 2024
- This video gives a simple overview of the most common types of epidemiological studies, their advantages and disadvantages. These include ecological, case-series, case control, cohort and interventional studies. It also looks at systematic reviews and meta-analysis.
This video was created by Ranil Appuhamy
Voiceover - James Clark
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Disclaimer:
These videos are provided for educational purposes only. Users should not rely solely on the information contained within these videos and is not intended to be a substitute for advice from other relevant sources. The author/s do not warrant or represent that the information contained in the videos are accurate, current or complete and do not accept any legal liability or responsibility for any loss, damages, costs or expenses incurred by the use of, or reliance on, or interpretation of, the information contained in the videos.
This video has taught me more in 10 minutes that my epi class taught me in 5 weeks.
Thank you! Glad you enjoyed the video
Preach girl
Dear sir/madam
We are happy to invite you as a speaker/Delegate to the upcoming Webinar of Digestive gastro 2020 which is scheduled on November 23-24, 2020
To Participate in the webinar visit: digestivegastro.gastroconferences.com
Thanks& Regards
Williams miller
this video solve my prob blocking me down for 4 years, haha
ungrateful. Pay attention in class.
Summary notes of study types:
1. 1:09 Ecological Study: comparing health of groups in different places or at different times
2. 1:52 Case Series: describe characteristics (demographics, clinical presentation, prognosis, unusual observations) of a group who has same disease or exposure.
3. 2:19 Cross-Sectional Study: snap shot at a given time on health in a group (e.g. health surveys) (also called prevalence studies)
4. 3:16 Case-Control Study: establish chance of exposure to a risk factor in cases (e.g. patients) vs controls (healthy individuals) over time (odds-ratio calculation)
5. 4:54 Cohort Study: follow group over time and check risk factors along the way (relative risk calculation)
6. 6:52 Interventional Study: double/triple-blinded randomized-control trials (e.g. test effects of a new drug)
Overview studies of multiple studies:
8:52 Systematic review
9:08 Meta-analysis
Study types 1,2,3 are ‘snapshots’ at a single point in time, while Study types 4,5,6 are ‘longitudinal’, meaning over a longer time period. Study type 4 is mostly retrospective (looking at the past), while Study type 5 and 6 are prospective (looking at the future).
Study type 4,5,6 can determine or describe probability of causality,
which is not possible in Study types 1,2,3.
Study types 1-5 are ‘observational’, while Study type 6 is ‘interventional’.
Watch the full video for examples and listing of advantages and disadvantages!
Thaaaank youu , wish i saw ur comment before having a 1h30 lecture , this is great summary , the vid makes more sense nw !
@@ahlemben5299 Haha, no problem! Good luck studying! You can do it ;)
@@Biomeducated So grateful , thank you
@@ahlemben5299 What are you studying if I may ask? Medicine? Biomedical? Life Sciences?
Biomed Master yeah sure im a pharmacy student , and here we have epidemiology as a subject ,to teach us how a study should be , even tho we study in french ( in Algeria ) i find these kinda vids very helpful and ur channel as well thanks for sharing
Exam notes:
1. Process of epidemiological studies:
Study question --> select a study type --> collect and analyse data --> interpret result --> report finding. Finally, it should be done in an ethical way
2. Ecological study: applies to groups and not individuals.
- Useful for comparing health across multiple places (e.g., measles rate across Australia and New Zealand), or comparing two time periods in a single place.
- Generating questions that can lend themselves to future investigation and studies.
3. Case series:
- Characteristics of a group of people with same disease or same exposure. The aim is to understand demographics, presentation, prognosis or other characteristics of people who have a particular disease.
4. Cross sectional study:
-It takes a selected population and measure health information at a given point of time, giving a snapshot of health. E.g., using surveys. They are also called prevalence study. Selected population should be representative of the total population.
Advantages:
- Relatively inexpensive
- Assessing exposure/outcomes
- Assess health needs
Disadvantages:
- Cannot be used to measure causality
5. Case control:
- Starts with cases, people with diseases. Uses a control group, similar people but no disease. Both groups are asked about their exposure to certain risk factors, and then odds ratio is calculated as given below:
OR = odds of being exposed - case/odds of being exposed - control
If OR>1, risk factor is associated with the disease
If OR=1, risk factor is not associated with the disease
If OR1, increased risk
RR=1, same risk
RR
Ethics? People pushing poison useless toxic clotshots don't have ethics, or an understanding of science. Why don't you delete this long-winded gobblygook and get a real job where you're not a worthless welfare queen.
tyy!!
Thank you!
Thanks 😊
Thank yoy
The way I'm going to remember this voice while writing my exams!!!!!!..Thank you so much really helpful..Epidemiology exams you can come now for all I care I'm going to Ace you....
This is the best video I have watched to understand biostats/different studies in a short time, a tremendous thank you to the makers!
Finally, I know the difference between case control and cohort study. Thanks a lot.
I love how you chose to animate/play out your voice over with the graphics! I saw this video in class when I was initially learning the various studies and it helped me a lot!
I have been watching your videos for the last hour and they are brilliant. Thank you! I've been studying my lecture notes, and reading my text book but I find your quick tutes tie it all together! They are so good. Thank you again.
Ya, these videos are good for drug pushers aspiring to be worthless welfare queens living off the taxpayer.
Thank you professor Liwen Zeng at the UofA for providing this link. Executed with me in mind. Intuitive, succinct, and informative.
Thank you so much! Although I'm German and not that good in English, I was able to understand the topic much better than with the help of regular German literature on epidemiology.
Thank you! I am very happy that it helped!
why?
Indeed, a great summary on this topic, excellent video. Thanks a thousand!
Superb.... :-)
So simple and nicely presented. As a student, we need these topics to be presented as interesting as this video was. Thank you and keep uploading more of these types of videoes....
Thanks!
Thank you for investing your time to produce and upload this incredibly useful video!
I absolutely love this video. I'm currently in my M.Sc Public Health. I had to learn this so many times but it was so helpful as a refresher. Maybe a little fast :)
Please keep up the good work
Why don't you go for a real career where you would benefit society instead of becoming a worthless welfare queen living off the taxpayer?
These 10 minutes taught me more than i studied for a whole year
Are you kidding me? Pay attention in class, that'all!!
Better than my epi class for years 😂 thank you.
You don’t know how this video ease me , it’s like a cold water in a hottest day , thank you 🌺🌺
Thank you so much! It helped me study for my Disease Detectives Science Olympiad Test. Very helpful information.
same here
Meeee toooo
I’m a current MPH student and this is a very succinct presentation. 😊
I have never understood medical statistics better before. Thanks a lot for your video😊
woowww!!! this video is amazing!!! i was in the university, listening to my instructor for about 1hour and 20min and I did not understand anything, but now I get everything!!! thank you so much
Dear sir/madam
We are happy to invite you as a speaker/Delegate to the upcoming Webinar of Digestive gastro 2020 which is scheduled on November 23-24, 2020
To Participate in the webinar visit: digestivegastro.gastroconferences.com
Thanks& Regards
Williams miller
thank you! it’s 2am and i’m still studying and you helped me by putting all that information into one video which was kind of fun to watch! could you do more videos of topics like salutogenisis and the process of a study?
same-12:AM,after 4 years :)
I agree. with Xender. Upload more examples and information. Of all the videos that are available on the Internet, this is one of the most helpful. I have been studying on my own for a Board Certification exam which includes epidemiological studies. This overview has been helpful in shaping my perspective of the topic.
Thanks for your feedback! I am glad you liked it. Making a few more..
enjoyable ,clear and time efficient ...waiting for more such great work
Prefect job
We need more videos like that
In public health
Thank you a lot Dr.
This vieo will help me at my exam.
Great video with wealth of information, Thank you.
Best video ever on this topic, thanks a bunch doc
Excellent work has been done by the video maker in this video and really clearly the important epidemiological designs has been addressed by the vocal person. Thank you so much sir for this hard work that you are doing for us. Waiting for more videos like this.
I think this video is garbage for un-scientific toxic clot shot drug dealers/pushers.
Amazing video. Honestly. So clear and concise. Thank you!
You really made me have interest in public health dentistry . Please do make more vidoes on it . Make on biostatisticis and others . Thankyou for helping learner’s like me . Great job 🙏🏻
Very informative , simple and helpful
Excellent video. Today, I read 3 chapter based on that information. I finally assimilated the info because of the help of this video.
Thanks! Glad you enjoyed the videos!
Thank you so much for sharing.
Thank you for this teaching. Nice presentation.
Thank you very much, greeting from Mexico.
Beautiful summary, amazing! thank you
So helpful for my exams in nutrition! Thanks!
Glad it helped!
That was very very very helpful, thank you it helped me a lot to understand the material and get high mark in my exam.
thanks... i'm having serious trouble remembering these, but this video has helped!
Dear sir/madam
We are happy to invite you as a speaker/Delegate to the upcoming Webinar of Digestive gastro 2020 which is scheduled on November 23-24, 2020
To Participate in the webinar visit: digestivegastro.gastroconferences.com
Thanks& Regards
Williams miller
Thanks very much. I now have a better understanding of the mentioned studies.
Pretty good and clear. Relax background music for focus on the content.
This helped me study for science olympiad! Thank you so much!!!
I learn from you which I could not from my teachers for the three months. Thank you so much for your hard work and good explanation!
Thank you! Glad it helped :)
Got more information within 10 minutes. Thank you sir ☺️ 👍
Awesome lecture. Thank you.
Thank you very much for making this wonderful video, I didn't understand it with my teacher in university and my exams on the horizon after 2 week I saw feeling lost until I saw this video. Many thanks for this video.
Thanks for the feedback! I am glad it helped
THANK YOU!!!!!!
Excellent video!!!!!
Now I feel I can crush step 3
An easy way for my students to understand the different Epid. strategies which supported my teaching material.
Very well done video. Thanks.
these videos are like torchbearer for epidemiology students. please come up with more more videos
Simple and clear 👍🏼 thank youu!!!
Excellent presentation. Helped a lot for a quick review before exam.
your work is great. easy to follow and understand.
This will literally help me in making of my research. My research is coronaviruses and this video help me alot.
All the best!
Thanke you sooo much 💖💖🌸
Excellent explanation
Thank you so much from Saudi Arabia
Very helpful , i loved the simple language ..
Thanks! Glad you enjoyed it
Great one, thanks a lot!
This was excellent !! Thank you so much
Great explanation..Thanks a lot! It really helped me for my diplome thesis....
Dear sir/madam
We are happy to invite you as a speaker/Delegate to the upcoming Webinar of Digestive gastro 2020 which is scheduled on November 23-24, 2020
To Participate in the webinar visit: digestivegastro.gastroconferences.com
Thanks& Regards
Williams miller
Thanks :) Great explanation !
Satisfactory lecture with easy apprise way......
short but informative. thank you
Very informative , simple and helpful:)
P
Thank you so much for this video.... it's too easy to understand in 10minutes .... while the class takes 2 days.
Thank you sir u made my life easy..
Really helpful.. Thanks a lot🙏Keep bringing such informative videos..
Very helpful video ! Thank you
thank you...I can understand..upload more videos...
Hi! Could you please explain the retrospective cohort study?
this cleared so many things out. thank you so much
*Only 18* 👇👇👇
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thank you for your great effort, from Egypt
Thank you! very helpful!
Excellent video ~ thanks!
This was so helpful. I just started following. I'm a 1st year MPH student and Epi has been very difficult but the way you broke everything down was GREAT! Thank you. Please share any other resources you think would be of help to me.
ua-cam.com/video/iX92BKys_mQ/v-deo.html
great explanation. pls upload more videos.
Very good!
i am epidemiology lecturer but ur presentation is amazing
Thanks. do more lectures.
Thanks for making this topic accessibile!
Curti muito seu vídeo. Obrigado pelo trabalho em que você trabalha nesses vídeos!!
Eu sou apaixonado por temas relacionados à saúde. Efetivamente, eu trabalho com telemedicina, oferecendo atendimento para todo o Brasil!
Mantenha o ótimo trabalho!.
so helpful in my public health studies
Thank u soo much for this...i always thought public health dentistry is boring n i can never learn it....but nw i think i can prepare well for final year ....
Thanks for uploading.a slight confusion what's difference bw ecological and cross sectional study
no words just thank you!!!
your amazing. thank you.
Amazingly explained 🤗
Finally, a platform to quench my thirst of Community Medicine :)
This Video is really helpfull. thank you so much
very informative....thank you sir
पहला सुख निरोगी काया दूजा सुख हो घर में माया,great info
An amazing video
Best video i have ever seen
For like 2 seconds I could have sworn I was about to watch and episode of Arrested Development. The guy sounds just like the narrator!
Wow🤩 nice explanation 👏
thank you
It's hard to believe when I saw my test results turned negative of HSV2 after using the herbal medications I got from (Dr. Anii) a great doctor who I came across on UA-cam who help people get rid of their sickness thank you so much Sir
thanks alot for this great video >>> just i have question >> can we conclude that case-control study can determine the cause of disease (causality) >> for example the case group who have lung cancer (disease) showed association with smoking (risk factor A) >> so can we say that smoking is causing lung cancer >> is it ?? same goes to other risk factors.
Dr Ranil, please make a video on causality and bias!!
This video help me alot thank
I feel a need on more explaintion on cross-sectional study. There must be some sort of comparison ( between groups in this case) in order to explain the influence of a factor.
Thx a lot, it's very helpful
Great!
Hey you are doing a great job.