Every single causal link made in epidemiologic studies will have potential confounders that need to be adjusted for. I'd be shocked if anyone could think of a c

Every single causal link made in epidemiologic studies will have potential confounders that need to be adjusted for. I'd be shocked if anyone could think of a causal link without a potential confounder, never mind that we may have unknown/unmeasured confounders that aren't even top of mind.