Neil Ashby Aug 29, 2017:

Hi Robert On the other hand, I can't see how "ratio" would fit into the sentence; neither grammatically nor logically.
FWIW, I think "correlation" is a much lesser stretch of the imagination - they're studying a new 'molecular technique' which provides results that correlate well with those derived from the urease test.

Search Results
[Correlation between rapid urease test and pathohistological ... - NCBI
https://www.ncbi.nlm.nih.gov/pubmed/21970072
by I Naumov - ‎2011 - ‎Cited by 4 - ‎Related articles
[Correlation between rapid urease test and pathohistological gastrobiopsy finding with positive immunological test in detecting Helicobacter pylori infection].

[Study of urease test or breath test (BT) and correlation with gastric ...
https://www.ncbi.nlm.nih.gov/pubmed/17712395
by RC Aguilar - ‎2007
[Study of urease test or breath test (BT) and correlation with gastric biopsy to detect helicobacter pylori (Hp) in dyspeptic patients at "Hospital Nacional Cayetano ...

Robert Carter Aug 18, 2017:

@David I didn't mean to seem rude, but I honestly can't think of any instance where I've seen "relación" mean "correlación", so unless you think it's a typo, I think it would be helpful to understand your logic here. I know it would seem to make sense in the context, but this is a technical piece of writing, so I'd be surprised if this term was misused. "Relación" might mean "ratio", but we would need more context to know if it applies here. Myself, I can't tell.