Sample size for an unmatched Case-Control Study using EPI info Mobile. Easy tutorial for beginners
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- เผยแพร่เมื่อ 9 ก.ค. 2024
- Epi info for rookies
In this video, I show you a very easy way to compute sample size for an unmatched Case-Control Study using Epi Info Mobile.
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This video briefly introduces how to use Epi Info Mobile software for essential data management. It introduces everyone to this amazing software and its data analysis functionalities.
Download Epi Info APK here for free drive.google.com/file/d/1CkD3...
If you are into data analysis, then check out this fantastic video on how to use SPSS for free • Learn SPSS IN 20 MINUT...
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Thank u sir for the lesson.
For Dr kadija sampling using fleiss w/cc
Case:55
Control:163
Total: 218
Nice one 👍
Thank you sir for the great video
Using fleiss w/CC cases -29 control-87 and total 116
Great job
Thank you so much for this insightful tutorial.
Sample size will be : 218
Using Fleiss W/CC
Cases: 55
Control: 163
Total: 218
Nice work!
Using fleiss w/ CC
Case: 55
Control: 163
Total : 218
Awesome 😎
Wow user friendly TH-cam lectures. Thank you sir.
Sample size as calculated with Fleiss w/CC:
Cases- 55
Controls163
Total- 218
Thanks for your feedback. 👍
i got the same answer. please is it correct?
Great job!
Fleiss w/CC
Cases: 55
Control:163
Total: 218
Rukayat 🙌
Great one sir
Thank you Joel
I always can't wait for your captivating tutorials... Just see how easy you have made this look. Thanks as usual
You are very welcome sir 🙌
It's very comprehendible and easy to relate to your respective study. thank you so much
I appreciate your feedback Ammarah 🙌
Very interesting class
Glad you found it useful 👍
Awesome! Using the Fleiss w/cc Cases 326, Controls 978, Total 1304. Easy pessy
Nice work Chisara
With the following variables:
Study design[unmatched case control study]
Confidence level[99.9%]
Power of study[90%]
Ratio of control[3:1]
Level of exposure for Contol[120/408 exposed converted to 29.4%]
Odd ratio was given as[4.5]
Level of exposure for cases[ The odd ratio actually helps us to get it, when inputed]
Using Fleiss w/cc
Cases-55
Control-163
Total-218
the above is the minimum sample size needed for the study.
Wow!! Great stuff Favour 👍
Straight to the point for mentoring others. I have gained a lot, sir
Thank you for your feedback sir Emmanuel 🙌
Thank you sir for the tutorials
Cases : 585
Control: 1754
Total: 2339
Fleiss wt cc
🤔
Excellent presentation 👏 👌 Keep it up
Thank you so much Gemechis 😊
You are a really great tutor ❤❤❤❤
Thank you Mubarak ☺️
This is good for us beginners. Thanks prof
Yes, it’s beginner friendly 😃
Great Dr
Thank you Chief
230 is the minimum sample size calculated by Fleiss w/cc.
Great response Mashak, How many cases and how many controls?
Dr Khadija will need a minimum of 230 fleiss w/cc I.e 58 cases and 172 control.she will a minimum of 230 sample size.Thank you so much sir,so interesting and succinct.
Awesome 👏
Dr khadija will need 218 fleiss with cc . She will need 55 cases and 163 control which gives 218 sample size if 30% of control exposed.
Thank you, sir for this lecture.
You are most welcome Mercy🙌
Thank you
You are most welcome 🙏
Lovely videos
Glad you like them! Thank you Adedamola
Very comprehensive sir
Thank you so much Chief Zakaria, I really appreciate all your feedback sir🙌
Thank you for sharing Sir
🙌
Thank you too Martha
Cases-55, Control-163, Total-218 Using fleiss w/CC
Awesome 👏
Thank you sir
you are welcome sir😀
Thank you Sir. please provide us with how to cal s.z of matched case control
Great question. Unfortunately Epi Info mobile doesn’t have a module for Matched Case control studies. I will cover another tool that can do that soon. Please stay tuned 😊
Great job! But so how do I go about determining a minimum sample size for match case control?
Great question Shamsudini. Epi info doesn’t have a module for matched case control. I am afraid we may have to use the formula method to calculate it.
I am planning to conduct study about risk factors of recurrent stroke.I have previous study with results in percentage but epiinfo needs odds ratio. How can I calculate sample size
Great question Salu! What kind of study are you trying to conduct? If it is a case control study, you can either enter the percent of controls exposed and the Odds ratio or the percentage of cases with exposure. If you enter the percent of cases with exposure , the odds ratio will be computed immediately. I hope this helps?
Im very interesting, if just you could translate or subtitle it some time in French, I understand at 50%. Thank you very much sir ! good video
Awesome response, I will work on the French versions. Thank you for your feedback Benjamin
Thank you so much sir
You are most welcome Chief Habibu 🙌
👍👍
Gracias 🙏
its a nice presentation. can we use only one research finding to get a percent of control exposure and odds ratio? how can we calculate sample size if there are different associated factors for our case in different literature? please respond to me
Great question. Yes you can use only one research to get the elements needed to calculate the sample size. And if there are different studies you can use the study that gives you the largest sample size. If there are different associated factors, calculate for all the associated factors and use the one that gives you the largest sample size. If the data is from different populations in different regions, use the one for your region or that is closest to your region. I hope this helps?
thanks a lot, I understand what you said this was my challenge since I started my proposal @@EpiInfoforRookiesE4R
What if you don’t have any exposure info on cases and controls? Will you do a pilot study?
Yes, you may need to rely on a pilot study to get that information. I hope this helps?
Fleiss w/CC : Cases -55, control - 163 and Total -218
Great stuff👍
Thank you very much for this awesome video, i am a public health student and I was doing my thesis proposal but am stuck can you please help me sir !
Sorry to hear. How can I help you with your proposal
@@EpiInfoforRookiesE4Rcan I do a comparative cross sectional study for two groups with different sample size?
And also my thesis is to compare effect of anesthesia method(general and spinal) on apgar score of neonates. What do u advice me? Thank you so much for replying back to my comment 😊
I got this result using Fleiss w/cc in epi info : cases 29 and controls 87 and a total of 116 , but I couldn’t change the confident level to 90% … is that ok ?
Awesome 👏
I have one question. I noticed that epi info can’t calculate everything e.g: matched case- control or matched cohort. Does this mean that StatsDirect on a laptop is better?
please help how to do so.. i m still confused
What is the issue about? Let me know specifics so I can help you
What should I use to calculate a sample size for matched case-control estudy? Can Epi Info do it?
Hi Brenda, Epi info can only be used for unmatched case control study sample size calculations. But you can use this tool here shiny.vet.unimelb.edu.au/epi/sample.size.mccs/. I will be making a video about using it soon so please stay tuned ☺️
make a video for cohort study sample size
Okay Sidra, coming up soon God willing 🙏, please stay tuned
Thanks
You are most welcome Firew🙏
How can detect level of confidence and power ?
Great question Maha. These are values that are set by the researcher. If you want your results to be more accurate then you increase the level of confidence as well as the power. Naturally when you increase any of the two the sample size will increase. Typically researchers use a confidence level of 95% and a power of 80% for observational studies and 99% and 90% for experimental studies. I hope this helps?
Good morning doc, please you may need to guide me. I have here cases to be 55, control= 163 and total sample size at 218. I use 30% as my percentage of controls exposed. thank you
This is super awesome Ije 👌. Which method did you use?
So from the the question, if 120 out of 400 have consumed a lot of fries, the percentage control exposed will be 120/400*100 = 30%. I wouldn't know if I am right
@@ijeomauzor4702 you are very correct ma'am. 😊👍
@@ijeomauzor4702 as per methods, i was referring to the formula that you used for your answer, whether you used the Kelsey, Fleiss or Fleiss with CC?
I used Fleiss with CC
Sample size َe fleiss w/cc is 218
🌸🌸🌸🌸🌸🌸
Awesome
If I can't find OR from the previous study?
What must I do, sir?
Great question Wahyu! If you don’t have the odds ratio from a previous study, you can use the hypothetical percentage of exposure among the cases and control. This can be based on previous studies or advise of an expert in the field that you are studying. I hope this helps?
@@EpiInfoforRookiesE4R Thank you, sir..
Hlo Sir, I have one doubt
Yes sir, I can help
So life can be this easy?
Yes sir. Welcome to the easy peasy revolution 😊
Please do for cohort🙏
Alrighty, coming up soon, please kindly stay tuned 🙌
Coming soon sir 😊
What if there is no baseline research
Great question! You will need to do a pilot study or you can use values based on the experience of a learned scientist in the field you are studying. I hope this helps?
Great one Sir
Thank you sir 👍