00:01
What type of study are we describing here? we sample participants from a defined population during the study period, regardless of their disease status, determined status, and exposure status.
00:14
To a, a cross -sectional study, b, a case control study, c, an observational cohort study, d, a randomized trial study, or e, an ecological study.
00:24
Okay, so let's go through what these are.
00:27
We'll start with e.
00:28
So an ecological study, it's a lot like, the other observational studies, but instead of looking at individuals, it's looking at populations.
00:37
So this isn't an equalical study because we're not looking at populations, we're looking at individuals within that population.
00:45
So on a larger scale than individuals.
00:50
So for example, it would be looking at perhaps different countries.
00:57
That would be an ecological study.
01:00
Okay, d, a randomized trial.
01:02
So we're not doing a trial.
01:03
Here.
01:04
That would be where you get to participants, you assign them to either the control group or the trial group, and then perhaps give some kind of treatment.
01:13
So that's not observational...