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People who interact with the medical system (especially young people) are not representative of the population as a whole. Especially in the US where people hav
by HPsquared 3y ago
People who interact with the medical system (especially young people) are not representative of the population as a whole. Especially in the US where people have to pay for medical treatment. All sorts of factors.
A typical healthy 25 year-old does not go to the doctor, like, ever.
On the other hand the population of 25 year-old drug users will have a higher rate of interaction with the medical system.
- tech_ken 3y agoThat’s an interesting point, I can’t say I recall what type of analysis if any was performed to address something like this. With that said, while these types of selection biases probably make it challenging to reliably estimate absolute drug usage rates, I would imagine they are less impactful on the relative rates between demos of geographical areas, which is the quantity of interest here.