Study Designs (Cross-sectional, Case-control, Cohort) | Statistics Tutorial | MarinStatsLectures

[@marinstatlectures]

👋🏼 In this statistics video lecture we review common study designs (for collecting data), with a focus on collecting "observational data". Study designs are generally Observational or Experimental, with the majority of health research focussing on observational data. It is important that you understand a bit about the different designs for collecting data, and their implications/limitations on analysis and interpretations. Like to support us? you can Donate (bit.ly/2CWxnP2), Share our Videos, Leave us a Comment, Give us a Like 👍🏼 or write us a review! Either way We Thank You! 👍🏼find the Best Statistics & R Programming Language Tutorials here: ( goo.gl/4vDQzT )

[@ekmickley]

I am studying epidemiology - this really helped!!! THANK YOU

[@plorandi]

Hi Professor! First of all, thank you for creating this series of videos! Could you please recommend some books with exercises and extra notes to use in parallel with the videos? Thanks again!

[@esthernyella8682]

This video deserved 10k views such a great summary

[@bushranazir6536]

BESTEST TEACHER I HAVE EVER SEEN. AWESOME COURSE.

[@fatumafatuma4077]

It’s just best,bestest is not in English

[@jackbest8842]

Thank you for the GREAT video!!! You're a savior!

[@sureshgeddada6166]

One of the finest courses on statistics I've ever seen.very good course Understood so many concepts in this course. your explination is very good.Thank you sir.

[@rolemodel5730]

The outline alone helped me get straight 5 marks ( mention 5 non experimental study design) in my research method Quiz... thanks Proff...

[@piadelevski1099]

Hi Profesor! I must point out, that this video about study design was very helpful, however I am confused, regarding a study that is required before and after design (I believe its called pre-post design). In which group of studies is this design included? And can you please explain a little bit more about it. Thank you very much. Good day :)

[@unknown-user001]

your lecture is one of the most comprehensive courses online

[@marinstatlectures]

Thanks! They mostly mirror the following course I teach: courses.students.ubc.ca/cs/courseschedule?pname=subjarea&tname=subj-section&dept=SPPH&course=400&section=001

[@sparemanedel5464]

We use a table heatmap using cohort analysis in customer retention over the months and it's percentage. We have cohort on the rows and it column are the months.

[@angelawilson2257]

Thank you for your time and knowledge, Sir! We all really appreciate your work. :)

[@nwasogwauchechik.781]

Thanks for your help and support

[@vencoyao307]

This is really helpful ！ Thank u so much

[@phyothiha3816]

Thank you very much, Marin :)

[@seanluan2691]

This is a wonderful lecture. It is clear and concise.

[@sbbperson]

this videos is so helpful. Thank you

[@drmohammadmahmoud]

that was amaaaaaaaazing sir...go ahead please

[@jafrinsultana7531]

Easily explained. Thank you

[@winnifredadong9342]

It was so wonderful atleast I have understood study design

[@nenyeblessing9768]

Thanks for sharing. This was helpful

[@mrmc55]

Thank you,,, from Tanzania ❤❤😊

[@pingutastic]

How did you film the videos to have the screen in front of you? This is an interesting way of filming that I haven't seen for lectures...

[@nwalhadakii]

This is called a learning glass. Basically he writes and explains everything, and at the end, they simply flip the video horizontally.

[@rickinho99h]

@@nwalhadakii thanks for explaining! My brain was hurting trying to solve this problem!

[@carolineg5697]

Thank you for making this! My professor uses the textbook definitions and I get very confused

[@17art3an]

Hello. I conducted a study 4 groups where. I measured impact of glass of water and image quality in certain medical exam. I took an image, gave them a glass of water and took another one, to measure image quality improvement. Is it a pre - post test study design? Or randomized control study? I performed this test on 103 random patients. Which 51 consecutive patients was first group, (image 1, image 2, water, image 3), 43 of them (received water, and took image 1 and image 2.) The rest had extra images to see how water behaves inside of the patient. Help me to clarify.

[@enyonamneequaye8088]

you the best thank you

[@bodhinisamaratunga8377]

Thank you so helpful. 💐

[@daisyjoyce3996]

Thank you for this Sir.

[@abelabebe7917]

Thank you very much. It was clear and to the point. Keep up the Good work.

[@HashirAbdi]

Very Nicely Explained in a comparative context... Thank You

[@xsiy6677]

I finally got these clarified, thanks heaps!

[@CJames-lh5sz]

thank you very helpful

[@itsot12]

For case control, you said that a con is that it lacks temporality, and as an example you said we don't know how long they've been smoking. But before that you said in a case control, we can ask about their smoking habits, such as how long they've been smoking. Can you explain this discrepancy...?

[@marinstatlectures]

In case control you are not following individuals forward in time, so you have no time element. For temporarily you can think of a cohort followed over time. Here there is temporality as you follow individuals from exposure (X) until the outcome (Y).

[@kaykwanu]

The kid outro is priceless. ❤

[@Shiro_hedgehog]

thank you for making this easy understand, with same case but different study design. tbh i'm trying to learn from different case and i still confused. this is very helpful

[@budhathokibijaya6636]

loved the videos, Thanks !!!

[@prayksheesaini8427]

how is RCT observational study design different from experimaental design? placebo effect? or something else too?

[@marinstatlectures]

An RCT is experimental, not observational. All the other study designs mentioned in this video are observational, except the RCT which is experimental

[@spirituals5654]

thank you so much

[@roubarguzel8507]

Can any one help me with this study what is the design of this study? Background In this nationwide study, we used the unique Danish registries to estimate the risk of suicide and deliberate self-harm in patients with congenital heart disease (CHD). Methods and Results We identified all Danish citizens receiving a diagnosis of CHD between 1977 and 2007. As a reference cohort, we randomly selected 10 citizens for each patient, matched by sex and birth year. Using the Fine and Gray competing risk regression, we estimated the cumulative incidences of suicide and self-harm, and Cox proportional regression analysis was used to compare the risk of suicide and deliberate self-harm in patients with CHD with the reference cohort. We identified 14 433 patients with CHD. Mean follow-up was 21.3 years, with a maximum follow-up of 42 years. Since the time of diagnosis, 2659 patients had died, with a median age of death of 23 years. A total of 15 patients had died by suicide, compared with 232 suicides in the reference cohort. Patients with CHD had a low and similar risk of dying by suicide when compared with the reference cohort (cause-specific hazard ratio, 0.81; 95% CI, 0.48-1.37; and subhazard ratio, 0.68; 95% CI, 0.41-1.16). We identified 336 events of self-harm among patients with CHD, and 3484 events in the reference group. The overall risk of deliberate self-harm was not increased in patients with CHD when compared with the reference group (subhazard ratio, 0.95; 95% CI, 0.85-1.06). Conclusions This is the first study to estimate the risk of suicide and deliberate self-harm in patients with CHD. We found that patients with CHD do not have an increased risk of suicide or deliberate self-harm when compared with a large reference cohort.

[@malaka.4428]

Thank you 🙏🏼

[@Moonstonn]

Very well done/explained and much appreciated.

[@jiwonkim4617]

Thank you for information ❤

[@SidneyRanger1138]

Thank you!

[@ymym720]

Hello, I am a beginner for research, I have an idea to start a research about the efficacy of steroid injection for different grades of trigger finger, is it possible to design as prospective cohort study? And how to calculate the sample size? thanks 😊😊

[@-lll7585]

Thank you for making these educational videos!

[@clifordakoyo406]

when can you do more teachings on COHORT?

[@thesocialactivist1182]

you are good to go. Thumbs up

[@abhishek-shrm]

Sir, can you suggest to me some books for studying statistics further in-depth?

[@dr.satyabratasahoo5644]

Excellent

[@yazminmojica4458]

🙏. Thank you very much 🌷

[@marinstatlectures]

you're welcome!

[@حيدرمحمدعبدالزهرة]

When i am watching this video, i feel like i am actually learning, unlike stupid lectures in college.

[@ziad_7772]

I agree

[@cristhianfhs2]

Very good videos

[@elviraibrayeva2452]

Is it applicable to non-medical study

[@marinstatlectures]

Yes, I just use those examples as I teach in public health, but the designs apply to any context

[@bikashshah_058]

Stick around guys..that sounds really funny😆

[@a.h.s75]

How could you write mirror?

[@ngwuarinze6209]

I think maybe you can use a glass board

[@Mywhimsicaldays]

T Thank you

[@55pl3]

Is it just me, or is Dr. Layne Norton's voice echoing through the void yelling about randomized human control trials?

[@gauravmalhotra7827]

Recall* =)

[@QZainyQ]

Okay, does he look like Zuckerberg or it's just me?

[@spring3341]

No use 🥺

[@marinstatlectures]

🙃

[@rosehenke4094]

is this dude writing backwards?

[@dreamlife5425]

thank you, this video was so informative

[@JosephCameron-y9z]

Thank you!

[@ardeshirmehr5221]

Thanks a lot