Simple question re retrospective study types

#1
Hi,

Please could someone confirm that I'm using the correct terminology to describe two studies listed below. I think that they are both retrospective cohort studies. No randomisation occurred for either.

(1) Using historical clinical records, the outcome for individuals which had the disease and received treatment A is compared to the outcome for individuals which had the disease and received no treatment

(2) The outcome for individuals with the disease receiving treatment A now is compared using historical clinical records to the outcome for individuals which had the disease and received treatment B.


Thank you.
 

hlsmith

Omega Contributor
#2
Do you have a list of possible answers to select from or not?


I might be fine with that for a description of #1, but it comes down to how they collected data and the study design. If you use historic data and used exposure status to analyze outcomes , sure. But if you have outcomes then found exposure status you move towards case-control. It is hard to come up with an accurate description based on single sentences.
 
#3
Do you have a list of possible answers to select from or not?


I might be fine with that for a description of #1, but it comes down to how they collected data and the study design. If you use historic data and used exposure status to analyze outcomes , sure. But if you have outcomes then found exposure status you move towards case-control. It is hard to come up with an accurate description based on single sentences.
Thank you. I'm asking this question because I've been asked to appraise the literature on condition for a medical conference - and want to avoid terminology that's incorrect :).

In the case of the second study, information I have is limited. The authors reported comparing individuals treated one way (their novel treatment) with similar individuals from older records, which had been treated a different way.