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9 March, 15:42

An investigator wants to assess whether smoking is a risk factor for pancreatic cancer. electronic medical records at a local hospital will be used to identify fifty patients with pancreatic cancer. one hundred patients who are similar but free of pancreatic cancer will also be selected. each participant's medical record will be analyzed for smoking history. identify the type of study proposed and indicate its specific strengths and weaknesses.

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  1. 9 March, 17:51
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    An investigator wants to assess whether smoking is a risk factor for pancreatic cancer. Electronic medical records at a local hospital will be used to identify fifty patients with pancreatic cancer. One hundred patients who are similar but free of pancreatic cancer will also be selected. Each participant's medical record will be analyzed for smoking history. A quantitative study is proposed and one weakness is that it requires an advanced medic.
  2. 9 March, 17:55
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    A quantitative study is proposed to assess statistcally whether there is a causal relationship between having a smoking history and having pancreatic cancer.

    By using statiscal tools, medical test results and personal data figures of the people included in the study can be compared. Some of the patients have and others do not have this type of cancer. Therefore patterns are investigated within the sample, and this will allow to conclude whether there statitics provide an evidence or not on the effect of smoking in generating pancreatic cancers.

    The main weaknesses are, first of all, that the correct aplication of such methods requires someone who is both expert in medicine and statistics and sometimes is difficult to find this profile. Moreover, depending on the type of information that is possible to collect from the patients the resulting figures can be biased due to statiscal errors, and we can be attributing an causal effect of smoking on cancer that is not actually true.
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