Database query for duration of forum membership

I was browsing through the members listing and noticed that many members were only active for a year or two, and hadn’t been on the forum for up to a decade. This to me indicates one of two possibilities: 1. A satisfactory recovery, or 2. Acceptance of their lot.

This data would be extremely meaningful to evaluate the average duration of PFS-like symptoms. If an administrator or somebody with access rights could run a database query which would elucidate how many members have had a short period of activity from account creation to final login date. This would be most enlightening to the community as a whole.

That would certainly be a great idea!