The potential to kill of the Glasgow effect has now been documented as 900 extra deaths were observed in Glasgow between 2003 and 2007 compared to Manchester and Liverpool.
"It was a jaw-dropping moment to see the similarities between the two other cities and the starkness of the differences in mortality," said Professor Phil Hanlon, expert in public health at Glasgow University and co-author of the report.
In recent years, concerns have emerged that Scots die earlier due to unknown factors as compared to their English counterparts. The study found that there were 4,502 more deaths in Glasgow during the study period.
The details appear in the online journal Public Health