> This retrospective study examines 20 yr of county-specific mortality data from 1979 to 1998. I've only read the abstract (so I don't know if my question is a

> This retrospective study examines 20 yr of county-specific mortality data from 1979 to 1998. I've only read the abstract (so I don't know if my question is answered somewhere in the full report), but does anyone have any insight about why newer data wasn't included in this study?