I am an Ethiopian Field Epidemiology Training Program resident at University of Gondar. The lecture helps me to select an appropriate study design for my AWD outbreak investigation. Thank you very much.

I always watch these videos from Ethiopia and they taught me a lot! keep on teaching us! Let excessive thanks for you!

Thank you very for the lesson you give because as a PhD fellow in public health and working on nested case control study, am getting a lot of benefits. Thanks a lot again!! Biftu Geda Haramaya University School of Nursing and Midwifery Ethiopia

wow ! What a simple explanation is that ? Respect !

A good lecture about case/control studies! One of the best things I ever encountered in reading epidemiology literature was the suggestion (cannot recall who made it, maybe Feinstein?) that we NOT use the word "controls" but use the term "referant" instead. Case/Referant studies instead of Case/Control studies. We are comparing two frequencies of exposure to some putative causal agent X in two groups of people: One group comprises the cases we discovered--we REFER (i.e. compare) their X-exposure frequency to the X-exposure frequency for the population group from which the cases arose.

Phd in health sciences student in Brisbane QUT, really these lectures help me to be more familiar with epidemiology. Thanks. and Wow the explanation is so simple. This is the simplest way of explaining epidemiology I have ever seen,

Great lecture. Thank you, from the Ethiopian FETP.

PhD candidate Walden University, Public Health. I have subscribed. Thank you

Thanking you so much for this...This is great. PhD candidate from Australia, I learnt alot....Thank you so much :-)

These videos are great, thank you so much for sharing.

Thank you very much! It assisted me a lot.

Very good video. Thank you!

Love it! thanks for posting!

can we use case control studies for other fields like agriculture or the natural science?

thank you very helpfull

Plz who can help me sample size calculation for case control study I have confused how to get P1 and P2?

Well understood

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