The phrase "abnormality is defined as" is correct and usable in written English.
You can use it when explaining or clarifying the meaning of the term "abnormality" in a specific context, such as in academic or medical writing.
Example: "In psychological studies, abnormality is defined as behavior that deviates significantly from the norm."
Alternatives: "abnormality refers to" or "the definition of abnormality is".
Congenital abnormality was defined as "any structural or genetic defect incompatible with life or potentially treatable but causing death".
Blood gas analyses were tested by Nova Biomedical Stat Profile, and the oxygenation index (PaO2/FiO2) was calculated and abnormality was defined as values ≤300.
This study is limited in that subjects underwent diagnostic imaging using more limited sequences than would be used in a clinically indicated scan and an abnormality was defined as one a trained MRI radiologist deemed to require further investigation.
Major cranial ultrasound abnormality was defined as either 1) complicated periventricular hemorrhage (subependymal/intraventricular hemorrhage associated with hydrocephalus requiring shunt placement, or persistent but non progressive ventricular dilation); or 2) periventricular intracerebral echodensity, echolucency, or persistent ventricular enlargement [ 15, 16].
The presence of a cardiac abnormality was defined as one of the following criteria: either one cardiac failure episode with clinical congestive signs, according to NYHA classification, or, in nonsymptomatic patients, alteration of any of these three parameters: FS<25% and/or EF<50% and/or ESWS>90 g cm−2.
Although the visual detection of regional wall motion abnormalities is defined as a basic competence in critical care echocardiography, no previous study in ICU setting has validated the level of training required for its acquisition.
The percentage of glomerular abnormalities is defined as the number of glomeruli with damage divided by the total number of glomeruli in the section.
