3 ms·
To your point, a confounding variable could be that diseased people go outside less (and therefore have less vitamin D)
by choxi 6y ago
To your point, a confounding variable could be that diseased people go outside less (and therefore have less vitamin D)
- ajsnigrutin 6y agothis! In slovenia, most of the deaths are in old-age/nursing homes, where most of the patients have severe health issues and a lot of them are bed-bound. Yes, they have lower vitamin D, but also many other health problem, so looking at a single variable (vitamin D) proves corellation but can't prove any causation without interfering (eg. giving half of them vitamin D supplements, to compare to the other half).
- devaboone 6y agoGreat point. Low Vitamin D is common in very sick people, partly because they are not as active, not going outside, and may not be eating the best diets. There are trials like you describe, which I'm hoping to get to in part 2... or 3? There is a ton of information to cover!