The only bad sausage, here, is this meta-analysis.
The BBC reports,
A link between eating processed meat, such as bacon or sausages, and pancreatic cancer has been suggested by researchers in Sweden.
They said eating an extra 50g of processed meat, approximately one sausage, every day would increase a person’s risk by 19%.
But the chance of developing the rare cancer remains low.
Here is the study.
This is a meta-analysis of 11 studies, none of which on their own link processed meat-eating with pancreatic cancer. So 11 x 0 = zero.
All the underlying studies suffer form the usual fatal flaws of weak association epidemiology: here that means, no knowledge of actual meat consumption, confounding risk factors for pancreatic cancer or biological plausibility.
As this study purports to link processed meat with cancer risk, the implication is that preservatives (i.e., nitrites) that are the cause.