Intro to Epidemiology Study Types

[@scyther6666]

Thank you for this video. We did an environmental epidemiological study which looked at air particles effecting different sets of people such as the old and infirm to children and adults. Each group was then analysed individually and the results gathered were collated and represented in graph, pie and scatter graphs and charts,

[@user-in8fu1lx6b]

Directionality and timing looks the same to me, if you conduct a study when you have exposure but still don't have an outcome then it will be forward or prospective and if you conduct the study at a point where the outcome have developed then it would be a backward or retrospective study. Is there a difference between the two?

[@Kk-fl8be]

To be honest guys, must watch.. very informative and you will definetly get baic ideas.

[@barrylitser3793]

Bedankt prof A. Soubry voor deze video te linken!

[@mufasas111]

this knowledge is so good I can taste it. I must have more so I can be sated!

[@manusuissa1]

I don't understand the difference between the directionality and the timing of the study. In both retrospective and backward direction we start with the outcome as known and we look back in time to see what the exposure was....so what is the difference?

[@avicenna8408]

+Manu Suissa In directionality, its exposure and outcome, in pros/retrospective its to do with the outcome and when your doing your study. A forward directionality means that you start with some exposure and then see what the outcome is, but this can still be retrospective. For example, if you looked at 1900's population data, and saw that during the industrial revolution there were more factory workers exposed to dangerous gases, then you could follow up to the 1950's and see which of those factory workers got cancer. So you started with your exposure and followed up to see an outcome, but the whole thing is still retrospective because the outcomes happened before your study. If you did the same study at your local bakery and saw there were more bakers, and more bakers meant more exposure to flour, you could follow them up and see if they got more lung conditions, but because the outcome this time is after your study its prospective

[@ibrahimy499]

+Avicenna very helpful comment thank you

[@balqeesaloran2225]

Thanks

[@dancingclo]

@@avicenna8408 thank you!

[@nabilbelabbes5013]

@@avicenna8408 thank you

[@hannahb9643]

these study type videos seriously saved me for my midterm tomorrow. your videos are awesome please keep making them! :D

[@rmackgirl]

Very informative, Thank you

[@jargall27]

great video. you describe the studies very clearly. thank you.

[@miaad84]

what is the difference between directional and timing study? they seem similar, and was not very clear to me.

[@missy07yashy]

if you taught my class ..im pretty sure i would have passed the first time .. and i wouldnt have to resit it tomorrow :'(

[@عُلاعلي-ز5ح]

This is a great explanation Thank you so much

[@MrMichelFoucault]

Really good. Thanks a lot. What tool did you use for the drawing ?

[@TheRealOkinami]

Thank you can you make a video named "What is Epidemiology? - Definition or Definitions and examples"?

[@Dahu1986]

Thank you for your video and could you please explain overview of the Observational Study With regards,

[@michaelamoah7523]

Great

[@Sam90180]

Thank you 🙏

[@sureshshenvi8186]

very nice video

[@studentxcmu]

Thank you.

[@dancingclo]

You are a godsend! thank you! :)

[@mphonyanaalfred4759]

i would like to understand the difference between cohort and retrospective study

[@TheAmyk01]

amaaaaaaazing!

[@Hae875]

Really helpful, thanks

[@hananahmed2051]

Really helpfull thanks

[@cnaber9827]

I don't understand the difference between directionality and timing. Does anyone?

[@lesetsamasekela9907]

Intro useful

[@isrl04]

thanks daf

[@manelkh3706]

I love you

[@andersnelson6888]

khan academy vibes

[@balqeesaloran2225]

Why you stopped you should cont😍

[@Imubozuu]

You sound EXACTLY like jack westin

[@olivenemeroff9056]

These are um . interstign comments..

[@husseinmohammed8421]

Wtf