00:01
So in this question we have different types of what we consider to be study designs and we want to know which one will be the appropriate one to define each one of the problems or studies that we have here.
00:16
So we're going to have the experimental study, what we call the retrospective cohort study, the perspective, case study, and i'm going to be put here cross -sectional and the ecological.
00:38
So of course we're not going to use all of them because we only have four studies.
00:42
So we're going to start for the first one.
00:45
So in the first one what we basically need to observe here is that in this case we are considering that here we have a study based on a hospital, that they were studying here antidepressant medication used during pregnancy and the risk for having that type of offspring.
01:15
So what they did was they have two groups, one that had that type of offspring.
01:24
Okay, so let's have one two groups here.
01:28
One with the characteristics that they want, so one present, and one that is, absent here.
01:40
So in this case what they did was they select people here with either present or absent in terms of the type of offspring and then they in each group they were checking the use here of anti -depressant medication.
02:04
So this means that they already have if it was if they have that characteristic present or not, but they want to determine here if they were exposed or not to that type of medication.
02:24
So that's what we want to evaluate the risk.
02:27
So that's what they want to do here.
02:30
So considering this, we have two groups and we are interested in the exposure here, not in the presence or not of a certain characteristic.
02:40
This is what we call case control...