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And: > Whether the positive effect of sun exposure demonstrated in this observational study is mediated by vitamin D, another mechanism related to ultraviolet
by icoder 2y ago
And:
> Whether the positive effect of sun exposure demonstrated in this observational study is mediated by vitamin D, another mechanism related to ultraviolet radiation, or by unmeasured bias cannot be determined.
- bawolff 2y agoEspecially because people who are sickly probably stay indoors more, "unmeasured bias" seems like it could cover a lot.