The phrase "a stringent case" is correct and usable in written English.
It can be used when referring to a situation or argument that is strict, demanding, or rigorous in its requirements or standards.
Example: "The lawyer presented a stringent case that left no room for doubt regarding the defendant's guilt."
Alternatives: "a strict case" or "a rigorous case".
This is a stringent case of n-fold cross-validation where n equals the total number of sequences.
It is possible that our use of a stringent case definition for diarrhea may have missed an association with more mild gastrointestinal symptoms such as nausea.
To avoid misclassification of the main outcome variable, we applied a stringent case definition to CDI, which included a positive toxin assay.
Using a stringent case definition, based on self-reported conjunctivitis combined with a positive hemagglutination-inhibition assay, we found that prophylactic treatment with oseltamivir significantly reduced the risk for infection per farm visit from 0.145 955% confidence interval [CI] 0.078 0.233) to 0.031 (95% CI 0.008 0.073).
CA was evaluated under two criteria: a stringent case in which a given fragment from cluster i was considered to be misclassified if it was predicted to belong to one of the other 2 k − 1 classes and a relaxed case where fragments only needed to be associated with one of the k clusters from the correct originating genome.
Another limitation is the reliance on recall for thyroid diagnosis, although we also investigated a more stringent case definition of report plus medication use and obtained similar results.
We compared prevalence rates and their 84%% confidence intervals to detect change due to a more stringent case definition (see also Table 1) [ 26].
In the present study we applied a more stringent case definition than used for surveillance of case reports, given the high rate at which vaccinees and controls described new-onset, single, mild respiratory symptoms.
We therefore defined acute gastroenteritis using a similar, but more stringent case definition than that used by the original outbreak team.
It is known that except for a few stringent cases, additive error of any 2-dimensional declustering scheme is at least one.
However, as discussed, our stringent case selection criteria yielded a more uniform data set for analyses.
