On: Are colonoscopies worth it?

[matheusmoreira]

Manufacturer claims around 8% false negatives, 92%-94% sensitivity, 87%-90% specificity and 99.94% negative predictive value.

Published study:

https://pubmed.ncbi.nlm.nih.gov/24645800/

It appears they calculated the negative predictive value based on the population sample of that study. It may differ significantly from the negative predictive value for the general population.