[bluGill]

Most retirement communities don't have that much supervision.

Regardless, you can get a lot of data, but of it is from people who have other significant differences in lifestyle from the average person and so it is questionable how it applies. Military gets more physical fitness (we already know most of us need more). Boarding school implies young - children or just older, and so while not useful there are differences related to that to control for (military as well, unless you can get officers who are older thus allowing controlling for age).

[JumpCrisscross]

> Most retirement communities don't have that much supervision

Retirement communities in India are relatively new. Most older folks get taken care of at home by domestic staff, which, given India's demographics, are incredibly cheap and thus plentiful.

[bluGill]

I forgot this was India, my mistake. Though that means there are essentially no retirement communities to work with there.

[givemeethekeys]

There are retirement communities in India and end-of-life care centers as well. Societies change, and thanks to the internet, societies change faster than ever.