It doesn't say where the cross over it, we can assume that -some- are living and home and don't participate at all, but that's not how the stats are calculated.

It doesn't say where the cross over it, we can assume that -some- are living and home and don't participate at all, but that's not how the stats are calculated. They are calculated separately, but the article is saying there is a connection (duh) but it's not the only factor for people living at home.