Maybe smoked fish, processed meat sausage and blood sausage (high haem) in Scandinavia and E. Europe.

For bad diagnosis and treatment, Barbados, Samoa and Singapore seem to be outliers.

> consuming fish might decrease the risk of colorectal cancer

Doesn't seem to help Norway, Portugal, Japan, Croatia, or Denmark.

Too much oil, not enough grain?

Complete hare-brained theory: Countries that eat a lot of mussels and oysters.

I would say in E EU white bread additives are not as much a problem as is alcohol and red meat.