Comment by defrost

There's also a decade plus of various "Net Children Go Mobile" annual surveys across major tecnological countries that plot the diffusion of phone use and ownership by age and country.

Leading to a large ANOVA table of years, countries, ages, mental health statitics, etc.

Yes, Denmark measures these things is ways different to the UK and both differ from the US.

All the same, each being reasonably internally consisent across time means trends can be picked after normalising.

The case for whether encroaching phone use does correlate with increased early onset mental issue diagnoses becomes a consideration of thresholds and variances.

https://www.researchgate.net/publication/283320908_Net_Child...