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Old 05-10-2012
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Stats Case Control versus Cross Sectional Studies

This question was in DIT:

A physician is looking for risk factors for pancreatitis. He interviews 100 hospitalized pts with pancreatitis and 100 hospitalized patients without pancreatitis. What type of study is this?

The answer is: Case-control but why can't it be Cross-sectional study ?
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Old 05-10-2012
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Cross-sectional is a snapshot:

If you interview them (which is least likely for cross-sectional) but the right answer will be something current, like "what up, man? How's your pancreas now?"

But generally it is drawing a blood sample or measuring a BP in a study population.

In your question there is a clear logical line between past and present, basically a retrospective study. You ask them what they did yesterday or a year ago (when and how long were you guys drinking alcohol basically?)
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I know cross sectional is a prevalance study but when you collect data from people to assess the frequency of the disease and risk factors at a PARTICULAR POINT IN TIME; How does that work? or what would you ask them? Everything that you would collect would be past answers ? Or is it collecting information in a time period or something ? Do you know what I mean or should I explain further ? lol
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Quote:
Originally Posted by Hope2Pass View Post
I know cross sectional is a prevalance study but when you collect data from people to assess the frequency of the disease and risk factors at a PARTICULAR POINT IN TIME; How does that work? or what would you ask them? Everything that you would collect would be past answers ? Or is it collecting information in a time period or something ? Do you know what I mean or should I explain further ? lol
not if you get a fat and long needle and stuck it right in their pancreas and get a sample
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Quote:
Originally Posted by DocSikorski View Post
not if you get a fat and long needle and stuck it right in their pancreas and get a sample
So cross sectional would be using lab values from test results on a patient to determine causality or risk factors ?
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Quote:
Originally Posted by Hope2Pass View Post
So cross sectional would be using lab values from test results on a patient to determine causality or risk factors ?
No.

Cross sectional study answers your question and tells you "whats going on right now" - thats why you posted in the first post that the right answer was case control.

Cross-sectional will not tell you what has lead to this particular condition that the patients are having right now.

Cross sectional study - you take out your wallet and see how much money you have.

Case control - you get your phone bill of 1000$ and a description of your incoming and outcoming calls - you are trying to see, how the F did you spend so much, whom you called... (the call to China, 4hrs long is the risk factor of paying all that you have in your wallet to cover the phone bill)
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haha good analogy. Makes sense. Thanks man
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Old 05-11-2012
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Quote:
Originally Posted by DocSikorski View Post
the call to China, 4hrs long
That call was to talk with me, to discuss some issues about step 1

ja ja ja (I'm laughing in spanish )

P.S. I'm in Taiwan (Republic of China)
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That call was to talk with me, to discuss some issues about step 1

ja ja ja (I'm laughing in spanish )

P.S. I'm in Taiwan (Republic of China)
One day, when I am complietely bored and diassapointed with the routine of a modern society, tired of paying bills and and taking pills, I will go to Shaolihn and learn how to levitate...
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Old 05-11-2012
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@Dr. Mexito.. You are from Taiwan? Nice.. So, was your medical course in English or Mandarin. I went to Medical school in China, and i was suprised that the classes I was having in English were only for foreigners and the locals had their classes in Mandarin. If you studied in Mandarin, how are you coping up?
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well, I had all my 6 years of medschool in russian.

not the whole world lives by the english language...
Espically such big countries as Russia and China.
Most of the european countries study medicine in their own respective language...
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It must difficult isnt it? Studying all over in english.. Are you russian or you went to med school in russia?
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