[arandr0x]

It would be interesting then for similar studies to add a dimension in addition to self-reported loneliness on self-reported time spent outside the home. While it's likely that sedentary elders are lonelier, it's not a 100% overlap (some elders live with close family and some lonely people are still very physically active/outside). You would expect lonely, active people to have lower death rates than lonely, sedentary people with similar pre-existing conditions under your hypothesis, and it would be a powerful thing to prove because it's a lot easier to make people go out than to make them make friends.