Epidemiological Studies: A Beginners guide

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.

Пікірлер: 340

  • @tabithamiller5814
    @tabithamiller58146 жыл бұрын

    This video has taught me more in 10 minutes that my epi class taught me in 5 weeks.

  • @LetsLearnPublicHealth

    @LetsLearnPublicHealth

    6 жыл бұрын

    Thank you! Glad you enjoyed the video

  • @TheBonny720

    @TheBonny720

    4 жыл бұрын

    Preach girl

  • @williamsmiller1130

    @williamsmiller1130

    3 жыл бұрын

    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

  • @taoyuyen4410

    @taoyuyen4410

    3 жыл бұрын

    this video solve my prob blocking me down for 4 years, haha

  • @richardbucumi1350

    @richardbucumi1350

    3 жыл бұрын

    ungrateful. Pay attention in class.

  • @Biomeducated
    @Biomeducated5 жыл бұрын

    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!

  • @ahlemben5299

    @ahlemben5299

    5 жыл бұрын

    Thaaaank youu , wish i saw ur comment before having a 1h30 lecture , this is great summary , the vid makes more sense nw !

  • @Biomeducated

    @Biomeducated

    5 жыл бұрын

    @@ahlemben5299 Haha, no problem! Good luck studying! You can do it ;)

  • @ahlemben5299

    @ahlemben5299

    5 жыл бұрын

    @@Biomeducated So grateful , thank you

  • @Biomeducated

    @Biomeducated

    5 жыл бұрын

    @@ahlemben5299 What are you studying if I may ask? Medicine? Biomedical? Life Sciences?

  • @ahlemben5299

    @ahlemben5299

    5 жыл бұрын

    ​ 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

  • @krishansinghSMX
    @krishansinghSMX2 жыл бұрын

    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

  • @levehajdu5748

    @levehajdu5748

    Жыл бұрын

    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.

  • @ttaddi

    @ttaddi

    Жыл бұрын

    tyy!!

  • @catsimmons4893

    @catsimmons4893

    Жыл бұрын

    Thank you!

  • @zunairayousuf9404

    @zunairayousuf9404

    Жыл бұрын

    Thanks 😊

  • @speakingfromthecloset1970

    @speakingfromthecloset1970

    Жыл бұрын

    Thank yoy

  • @indaapaulus2959
    @indaapaulus29596 жыл бұрын

    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....

  • @AK-dn8pn
    @AK-dn8pn3 жыл бұрын

    This is the best video I have watched to understand biostats/different studies in a short time, a tremendous thank you to the makers!

  • @studentxcmu
    @studentxcmu5 жыл бұрын

    Finally, I know the difference between case control and cohort study. Thanks a lot.

  • @moviemaker667
    @moviemaker6676 жыл бұрын

    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!

  • @myaussiebabe1
    @myaussiebabe15 жыл бұрын

    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.

  • @levehajdu5748

    @levehajdu5748

    Жыл бұрын

    Ya, these videos are good for drug pushers aspiring to be worthless welfare queens living off the taxpayer.

  • @911ForTheSoul
    @911ForTheSoul3 жыл бұрын

    Thank you professor Liwen Zeng at the UofA for providing this link. Executed with me in mind. Intuitive, succinct, and informative.

  • @SunshineSmile19
    @SunshineSmile197 жыл бұрын

    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.

  • @LetsLearnPublicHealth

    @LetsLearnPublicHealth

    6 жыл бұрын

    Thank you! I am very happy that it helped!

  • @AyazSamo

    @AyazSamo

    6 жыл бұрын

    why?

  • @Biomeducated

    @Biomeducated

    5 жыл бұрын

    Indeed, a great summary on this topic, excellent video. Thanks a thousand!

  • @rakeshsahoo4287
    @rakeshsahoo42876 жыл бұрын

    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....

  • @LetsLearnPublicHealth

    @LetsLearnPublicHealth

    6 жыл бұрын

    Thanks!

  • @mozartamadeus1580
    @mozartamadeus15805 жыл бұрын

    Thank you for investing your time to produce and upload this incredibly useful video!

  • @lillycarinabenedikt65
    @lillycarinabenedikt653 жыл бұрын

    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

  • @levehajdu5748

    @levehajdu5748

    Жыл бұрын

    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?

  • @prakashadhikari9722
    @prakashadhikari97223 жыл бұрын

    These 10 minutes taught me more than i studied for a whole year

  • @20ckpwt18

    @20ckpwt18

    3 жыл бұрын

    Are you kidding me? Pay attention in class, that'all!!

  • @nurjannaharris5773
    @nurjannaharris57734 жыл бұрын

    Better than my epi class for years 😂 thank you.

  • @unknownperson-pt7bf
    @unknownperson-pt7bf4 жыл бұрын

    You don’t know how this video ease me , it’s like a cold water in a hottest day , thank you 🌺🌺

  • @harishsathish7088
    @harishsathish70885 жыл бұрын

    Thank you so much! It helped me study for my Disease Detectives Science Olympiad Test. Very helpful information.

  • @sapphire.x7471

    @sapphire.x7471

    2 жыл бұрын

    same here

  • @amalya9063

    @amalya9063

    2 жыл бұрын

    Meeee toooo

  • @sarvagnyacreativity2583
    @sarvagnyacreativity258311 ай бұрын

    I have never understood medical statistics better before. Thanks a lot for your video😊

  • @swnerd-2320
    @swnerd-2320 Жыл бұрын

    I’m a current MPH student and this is a very succinct presentation. 😊

  • @noofkhalifa714
    @noofkhalifa7144 жыл бұрын

    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

  • @williamsmiller1130

    @williamsmiller1130

    3 жыл бұрын

    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

  • @yasemingocmen6056
    @yasemingocmen60565 жыл бұрын

    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?

  • @petrichoroN-

    @petrichoroN-

    Жыл бұрын

    same-12:AM,after 4 years :)

  • @aymansd7386
    @aymansd73865 жыл бұрын

    Prefect job We need more videos like that In public health

  • @eyrndt
    @eyrndt6 жыл бұрын

    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.

  • @LetsLearnPublicHealth

    @LetsLearnPublicHealth

    6 жыл бұрын

    Thanks for your feedback! I am glad you liked it. Making a few more..

  • @alihossainalluwaym3913
    @alihossainalluwaym39133 жыл бұрын

    enjoyable ,clear and time efficient ...waiting for more such great work

  • 6 жыл бұрын

    Thank you a lot Dr. This vieo will help me at my exam.

  • @albertagyemang1425
    @albertagyemang14256 жыл бұрын

    Great video with wealth of information, Thank you.

  • @dr.chiropractor6156
    @dr.chiropractor61566 жыл бұрын

    Best video ever on this topic, thanks a bunch doc

  • @qaisarsbiology5267
    @qaisarsbiology52674 жыл бұрын

    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.

  • @levehajdu5748

    @levehajdu5748

    Жыл бұрын

    I think this video is garbage for un-scientific toxic clot shot drug dealers/pushers.

  • @faithblamon1700
    @faithblamon1700 Жыл бұрын

    Amazing video. Honestly. So clear and concise. Thank you!

  • @cherryrapper
    @cherryrapper4 жыл бұрын

    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 🙏🏻

  • @pqhu1
    @pqhu16 жыл бұрын

    Very informative , simple and helpful

  • @mpayero29
    @mpayero296 жыл бұрын

    Excellent video. Today, I read 3 chapter based on that information. I finally assimilated the info because of the help of this video.

  • @LetsLearnPublicHealth

    @LetsLearnPublicHealth

    6 жыл бұрын

    Thanks! Glad you enjoyed the videos!

  • @sweswelattdr2964
    @sweswelattdr29646 жыл бұрын

    Thank you so much for sharing.

  • @JuanPablo-it1ll
    @JuanPablo-it1ll5 жыл бұрын

    Thank you very much, greeting from Mexico.

  • @maja8453
    @maja84537 жыл бұрын

    So helpful for my exams in nutrition! Thanks!

  • @LetsLearnPublicHealth

    @LetsLearnPublicHealth

    7 жыл бұрын

    Glad it helped!

  • @miraclemix
    @miraclemix4 жыл бұрын

    Thank you for this teaching. Nice presentation.

  • @amonoracheal9118
    @amonoracheal91184 жыл бұрын

    Beautiful summary, amazing! thank you

  • @leukocyteofdoom
    @leukocyteofdoom5 жыл бұрын

    thanks... i'm having serious trouble remembering these, but this video has helped!

  • @williamsmiller1130

    @williamsmiller1130

    3 жыл бұрын

    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

  • @majdmohamad30
    @majdmohamad306 жыл бұрын

    That was very very very helpful, thank you it helped me a lot to understand the material and get high mark in my exam.

  • @helenamarchan700
    @helenamarchan7005 жыл бұрын

    Thanks very much. I now have a better understanding of the mentioned studies.

  • @vivianchenis5898
    @vivianchenis58985 жыл бұрын

    Pretty good and clear. Relax background music for focus on the content.

  • @zamiraakbarova7373
    @zamiraakbarova73735 ай бұрын

    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!

  • @LetsLearnPublicHealth

    @LetsLearnPublicHealth

    2 ай бұрын

    Thank you! Glad it helped :)

  • @bus1105
    @bus1105 Жыл бұрын

    This helped me study for science olympiad! Thank you so much!!!

  • @bindaasbn4366
    @bindaasbn43663 жыл бұрын

    Got more information within 10 minutes. Thank you sir ☺️ 👍

  • @PallavSharda07
    @PallavSharda074 жыл бұрын

    Awesome lecture. Thank you.

  • @salahalawadhi5623
    @salahalawadhi56235 жыл бұрын

    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.

  • @LetsLearnPublicHealth

    @LetsLearnPublicHealth

    5 жыл бұрын

    Thanks for the feedback! I am glad it helped

  • @riichiota2683
    @riichiota26833 жыл бұрын

    THANK YOU!!!!!! Excellent video!!!!! Now I feel I can crush step 3

  • @HelenBGumba-oo8uz
    @HelenBGumba-oo8uz3 жыл бұрын

    An easy way for my students to understand the different Epid. strategies which supported my teaching material.

  • @zunairaali5091
    @zunairaali50913 жыл бұрын

    these videos are like torchbearer for epidemiology students. please come up with more more videos

  • @Hisarrogance2
    @Hisarrogance25 жыл бұрын

    Very well done video. Thanks.

  • @huilam5465
    @huilam54654 жыл бұрын

    Simple and clear 👍🏼 thank youu!!!

  • @gracelydia9827
    @gracelydia9827 Жыл бұрын

    Excellent presentation. Helped a lot for a quick review before exam.

  • @buttmyg
    @buttmyg4 жыл бұрын

    This will literally help me in making of my research. My research is coronaviruses and this video help me alot.

  • @handeercel6966

    @handeercel6966

    3 жыл бұрын

    All the best!

  • @leoangel93
    @leoangel936 жыл бұрын

    your work is great. easy to follow and understand.

  • @yasmeenfahad9064
    @yasmeenfahad90645 жыл бұрын

    Thanke you sooo much 💖💖🌸 Excellent explanation

  • @drabdulrhmanalsaleemy3270
    @drabdulrhmanalsaleemy32706 жыл бұрын

    Thank you so much from Saudi Arabia Very helpful , i loved the simple language ..

  • @LetsLearnPublicHealth

    @LetsLearnPublicHealth

    6 жыл бұрын

    Thanks! Glad you enjoyed it

  • @jonahschreier8749
    @jonahschreier87494 жыл бұрын

    Great one, thanks a lot!

  • @nurdan1975
    @nurdan19756 жыл бұрын

    Great explanation..Thanks a lot! It really helped me for my diplome thesis....

  • @williamsmiller1130

    @williamsmiller1130

    3 жыл бұрын

    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

  • @Be1smaht
    @Be1smaht2 жыл бұрын

    This was excellent !! Thank you so much

  • @dwaithasivadas2421
    @dwaithasivadas24216 жыл бұрын

    Thanks :) Great explanation !

  • @ShadabKhan-yi7lg
    @ShadabKhan-yi7lg5 жыл бұрын

    Satisfactory lecture with easy apprise way......

  • @bhavnasriramka
    @bhavnasriramka6 жыл бұрын

    short but informative. thank you

  • @bbgcasas
    @bbgcasas6 жыл бұрын

    Very informative , simple and helpful:)

  • @tsewangladol8514

    @tsewangladol8514

    2 жыл бұрын

    P

  • @pihuu7666
    @pihuu7666 Жыл бұрын

    Thank you so much for this video.... it's too easy to understand in 10minutes .... while the class takes 2 days.

  • @dr.sciencee640
    @dr.sciencee6406 жыл бұрын

    Thank you sir u made my life easy..

  • @ammy.007
    @ammy.0073 жыл бұрын

    Really helpful.. Thanks a lot🙏Keep bringing such informative videos..

  • @ibtissemmaadoune1715
    @ibtissemmaadoune17154 жыл бұрын

    Very helpful video ! Thank you

  • @sowbarnikamaheskumar6269
    @sowbarnikamaheskumar62696 жыл бұрын

    thank you...I can understand..upload more videos...

  • @valkirynick
    @valkirynick4 жыл бұрын

    Hi! Could you please explain the retrospective cohort study?

  • @Fattoush1
    @Fattoush15 жыл бұрын

    this cleared so many things out. thank you so much

  • @yanavanina9754

    @yanavanina9754

    3 жыл бұрын

    *Only 18* 👇👇👇 747107.loveisreal.ru

  • @eslam3bdallah
    @eslam3bdallah6 ай бұрын

    thank you for your great effort, from Egypt

  • @boldlykua831
    @boldlykua8313 жыл бұрын

    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.

  • @blackpanda5467

    @blackpanda5467

    3 жыл бұрын

    kzread.info/dash/bejne/m4xtlKSEqdbFnbQ.html

  • @qian2838
    @qian28386 жыл бұрын

    Thank you! very helpful!

  • @shaneycollins5713
    @shaneycollins57132 жыл бұрын

    Excellent video ~ thanks!

  • @harshidesilva1942
    @harshidesilva19425 жыл бұрын

    great explanation. pls upload more videos.

  • @Dr-zj5uy
    @Dr-zj5uy4 жыл бұрын

    i am epidemiology lecturer but ur presentation is amazing

  • @MrCrapBag
    @MrCrapBag6 жыл бұрын

    Very good!

  • @117-sheikmohamedmohideen7
    @117-sheikmohamedmohideen76 жыл бұрын

    Thanks. do more lectures.

  • @dr.diegomaier
    @dr.diegomaier9 ай бұрын

    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!.

  • @mabelaghadiuno5015
    @mabelaghadiuno50156 ай бұрын

    Thanks for making this topic accessibile!

  • @hazeemjais8232
    @hazeemjais82326 жыл бұрын

    so helpful in my public health studies

  • @gursaranjitsingh9687
    @gursaranjitsingh96874 жыл бұрын

    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 ....

  • @qrz7152
    @qrz71526 жыл бұрын

    Thanks for uploading.a slight confusion what's difference bw ecological and cross sectional study

  • @mekonnengoyteom1900
    @mekonnengoyteom19004 жыл бұрын

    no words just thank you!!!

  • @bryanadriano88
    @bryanadriano885 жыл бұрын

    your amazing. thank you.

  • @kainatahmed8671
    @kainatahmed86713 жыл бұрын

    Amazingly explained 🤗

  • @petrichoroN-
    @petrichoroN- Жыл бұрын

    Finally, a platform to quench my thirst of Community Medicine :)

  • @hellendrania3718
    @hellendrania37184 жыл бұрын

    This Video is really helpfull. thank you so much

  • @tariqraufafridi5390
    @tariqraufafridi53904 жыл бұрын

    very informative....thank you sir

  • @health-wellnessgyan7235
    @health-wellnessgyan72352 жыл бұрын

    पहला सुख निरोगी काया दूजा सुख हो घर में माया,great info

  • @mohammedhasssn6526
    @mohammedhasssn65265 жыл бұрын

    An amazing video

  • @neajm8464
    @neajm84643 жыл бұрын

    Best video i have ever seen

  • @kaitlin2150
    @kaitlin21505 жыл бұрын

    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!

  • @I_love_BTS_2025
    @I_love_BTS_20252 жыл бұрын

    Wow🤩 nice explanation 👏 thank you

  • @santimadrid8196

    @santimadrid8196

    2 жыл бұрын

    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 KZread who help people get rid of their sickness thank you so much Sir

  • @mr.abdulrahmansaleh8405
    @mr.abdulrahmansaleh84056 жыл бұрын

    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.

  • @adammohammad9591
    @adammohammad95915 жыл бұрын

    Dr Ranil, please make a video on causality and bias!!

  • @shuyingsha9023
    @shuyingsha90236 жыл бұрын

    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.

  • @brightstarboyz8115
    @brightstarboyz81152 жыл бұрын

    This video help me alot thank

  • @jiaqiangelatian9417
    @jiaqiangelatian94177 жыл бұрын

    Thx a lot, it's very helpful

  • @LetsLearnPublicHealth

    @LetsLearnPublicHealth

    7 жыл бұрын

    Great!

  • @medicoma8649
    @medicoma86494 жыл бұрын

    Hey you are doing a great job.