covariate variable
IRI: https://spec.industrialontologies.org/ontology/construct/CovariateVariable
Defined In: https://spec.industrialontologies.org/ontology/biopharma/Statistics/
SubClass Of: bfo:STATO_0000258
Class Hierarchy
owl:Thing › bfo:STATO_0000258 › covariate variable
Definition
variable representing an observed rather than deliberately assigned characteristic that is specified for accounting for variation in a dependent variable separately from variation associated with the factors under study
Examples
- dissolved oxygen concentration recorded throughout each cell culture run and specified as a covariate when feed strategy is a factor and harvest titer is the dependent variable; actual culture temperature recorded throughout each bioreactor run and specified as a covariate when temperature is not deliberately varied; initial viable cell density specified as a covariate when culture temperature and feed strategy are factors; seed culture age at inoculation recorded for each bioreactor run and specified as a covariate in an analysis of culture growth and productivity
Adapted From
- http://purl.obolibrary.org/obo/OBCS_0000040
Primitive Class
This class is declared primitive and it does not have necessary and sufficient condiftions defined.
Primitive Rationale
There are insufficient constructs to create a set of necessary and sufficient conditions.
Formal Axioms
First-Order Logic Axioms
CovariateVariable(x) → Variable(x)
Semi-Formal Natural Language Axioms
if x is a ‘covariate variable’ then x is a ‘variable’
Description Logic
constr:CovariateVariable ⊑ bfo:None
SubClassOf: bfo:None