The phrase "are often unspecified" is correct and usable in written English.
It can be used when discussing situations, details, or elements that lack clear definition or specification.
Example: "In many studies, the variables involved are often unspecified, leading to ambiguity in the results."
Alternatives: "are frequently undefined" or "are commonly vague".
where α 0 t) is a baseline hazard function that is often unspecified, β 1,β 2,…,β p are regression coefficients, and x 1i (t),x 2i (t),…,x pi (t) are covariates for subject i.
The large number of drug families offered for sale, as well as the heterogeneity of the symptomatology in case of overdose, make the diagnosis difficult, especially since the drug in question is often unspecified and the toxicological analysis is not exhaustive.
We remark that in the following, when not crucial, the 'center' of the cylinder will be often unspecified, e.g., Q ρ ( z 0 ) = Q ρ ; the same convention will be adopted for balls in R n therefore denoting B ( x 0, ρ ) = B ρ ( x 0 ).
Nonparametric tests were often unspecified but where they were included Mann-Whitney U test, Spearman's correlation coefficient and the Wilcoxon matched-pairs signed ranks test.
71 74 88 91 These were often unspecified as scepticism, lack of motivation or refusal from the families, occurring prior to engagement or during treatment.
However, the cognitive mechanisms underlying the interference are often left unspecified.
Besides, paleosols, lake or wetland sediments, and other unspecified, unconsolidated sediments are often observed between or on the top of such volcanic deposits in the island (e.g. Park et al. 1998, 2000a, b; Lee et al. 2014a, b; Park et al. 2014; Lim et al. 2015; Ahn and Choi 2016).
They reject labelling broad consents to biobank research 'informed', as aspects of future research projects are today often unspecified and to some extent unforeseen.
On the contrary, crossing into Israel from Jerusalem is a much more difficult process, especially for those with a Palestinian ID who must first obtain a permit that is often revoked for unspecified security concerns.
Prior to 1990, respiratory syncytial virus (RSV) was often diagnosed as an unspecified viral infection; we therefore included some non-specific infections.
