This is pretty much the conclusion of the article as well :
> Well-being was more strongly associated, either positively or negatively, with most of these other variables than with digital-technology use. In fact, regularly eating potatoes was almost as negatively associated with well-being as was technology use, and the negative association between wearing glasses and well-being was greater.
> Well-being was more strongly associated, either positively or negatively, with most of these other variables than with digital-technology use. In fact, regularly eating potatoes was almost as negatively associated with well-being as was technology use, and the negative association between wearing glasses and well-being was greater.