The trouble with meta analyses is that they are an average of a many smaller studies, a number of which may have statistical issues, clinical study design issues, or an inability of the authors to draw factual conclusions form their data. Tread carefully would be my advice... In the example above, there are a number of issues; it was three dentists doing the statistical analyses on six other studies, and the statistical power of their analysis was...wait for it..."The magnitude of the effect was zero to small". (I.e. not statistically significant)
Personally, if you snore and you have any trouble staying asleep or awake, you should see a doctor and see if you can get some improvement. I know many folks who have had improvement just by changing from back to side sleeping (it is cheap!), and many others for whom CPAP machines of one sort or another help. My view is why go through life impaired if you don't have to?
Thanks for starting the thread
@Gale Hawkins! I learned a bunch.
All the best,
Peter