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Is it also possible they're finding healthier people that are proactive in their treatment, maybe even exercise more, work longer, etc...
by what_hn 3mo ago
Is it also possible they're finding healthier people that are proactive in their treatment, maybe even exercise more, work longer, etc...
- modeless 3mo agoGood guess. The actual mechanism is that people who don't get the vaccination are more likely to need to visit the hospital to treat their shingles, and because they visit the hospital more they have more chances to get a diagnosis of dementia in a hospital. See this presentation: https://youtu.be/qlTnnQytOJ0 https://youtu.be/qlTnnQytOJ0 The lesson is to be extremely suspicious of findings of causation based on observational studies.
- runeks 3mo ago> Good guess. The actual mechanism [...] Why couldn't both these factors contribute to the result of the study?