The phrase "a function of the severity" is correct and usable in written English.
It can be used in contexts where you are discussing how something varies or depends on the level of severity of a particular situation or condition.
Example: "The treatment plan will be adjusted as a function of the severity of the patient's symptoms."
Alternatives: "dependent on the severity" or "based on the severity".
Suppose that we discovered, through statistical analysis, that the crime rate varied as a function of the severity of punishment multiplied by the probability of apprehension.
Community severe storm impacts occur in each pillar of the community, that is, the environmental, economic, social, and cultural pillars, and have differential monetary impacts on community assets as a function of the severity of the storm (Hartt 2011, 2014; Mohammadi 2014).
Firstly, chimpanzee victims vary the acoustic structure of their screams as a function of the severity of aggression they are facing [16], and field experiments have shown that receivers can discriminate between these differences [5].
Finally, WTP can be modeled as a function of the severity and duration of illness, reduction in probability and respondent characteristics (Hammitt and Haninger 2007).
The amount of degradation products generated during steam pretreatment is a function of the severity of the pretreatment and the concentration of carbohydrates present in the feedstock.
However, there was no difference in the extent of chronic scarring as a function of the severity of the acute injury between the WT and Clic4 null mice.
The milled soot shows evolving changes as a function of the milling severity or time.
Although this is a dominant theme, there is clearly heterogeneity, which we believe is a function of both the severity and/or repetition of the injury and the individual's immune response to (recurrent) pancreatic injury.
In addition to the risk of death, the burden of the disease is related to the symptom-derived disability, which, in turn, is a function of the frequency and severity of the attacks.
So, while it is well known that optimal cutpoints vary as a function of the population being investigated, severity of caseness, case prevalence and gold standard employed, this study compares the cutpoints derived from five optimisation criteria, for the MHI-5 and the MCS.
Retinal haemodynamics have been investigated extensively in the quest for early functional markers of diabetic retinopathy [ 2]; some of the changes detected appear to be a function of the duration of diabetes and the severity of retinopathy [ 2– 4].
