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A comment on The Hype Around Photobiomodulation. Parent comment

Re:The Hype Around Photobiomodulation by sooheon on Sunday August 04, 2024 @02:09PM (#41155291)
> Most likely healthy people go outside more than sick people and thus get more sun exposure

Such a lazy critique.

Here's the actual study: https://onlinelibrary.wiley.com/doi/10.1111/joim.12251

Number of subjects: 39,973

Follow up period: 20 years

Some factors controlled for: smoking, history of antidiabetic meds, history of CVD meds, weight/height/BMI, level of exercise, income, alcohol consumption, N pregnancies.

I think these factors pretty well correlate with "health" (however you'd measure actually that).

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Re:The Hype Around Photobiomodulation by valenterry on Monday August 05, 2024 @06:26PM (#41166189)
That's what the authors say:

> Despite having adjusted for several potential confounders, the major shortcoming of this study is the inability to distinguish between the consequences of an unhealthy lifestyle and of avoidance of sun exposure.

Take depression for example. None of the factors you mentioned would control for it and depression is often not diagnosed, especially early on.

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