The phrase "a severity gradient of" is correct and usable in written English.
It can be used in contexts where you are discussing varying levels of severity or intensity related to a particular subject or phenomenon.
Example: "The study revealed a severity gradient of symptoms among patients, indicating that some experienced mild discomfort while others faced severe complications."
Alternatives: "a scale of severity" or "a range of severity".
They demonstrated the presence of a severity gradient (increased severity of bronchiolitis correlated with increased asthma severity).
Figure 1 shows that a severity gradient (increased severity of RSV infection in infancy is associated with an increased prevalence of RW) is evident across the second through fifth years of life.
Clearly what is now needed is the exploration of factors that might contribute to the existence of a severity gradient, and more specifically whether this can best be explained by the modifying effect of another continuously distributed factor, such as IQ, or whether it is indicative of ASCs being inherited as a single, continuous severity dimension.
Nonetheless, the presence of a severity gradient, the fact that the RSV effect observed in the third year of life persists into the fifth year, and the fact that other pathogens do not show this association, strongly support the notion that RSV infection in infancy is associated with asthma in childhood.
At one end of a severity gradient, good plagiarism-avoidance behaviors include using quotation marks with direct quotes, avoiding paraphrases that copy word strings of five or more words from the original source (Howard, 1995; Roig, 2001), and inclusion of a proper citation.
Using logistic regression, documented RSV infection in the first year of life was associated with an increased risk of RW5, and a severity gradient was evident (Table 2).
Strikingly, each of these solutions was consistent with a severity gradient.
In contrast, however, other researchers have argued for a severity gradient [ 12, 13], with presentation being modified according to the severity of autism symptoms.
Autism Spectrum Conditions (ASCs) are characterized by a high degree of clinical heterogeneity, but the extent to which this variation represents a severity gradient versus discrete phenotypes is unclear.
Considering the 4 cluster model for example, although not all AQ items demonstrate a clear severity gradient, 64% of the AQ items are consistent with gradient of severity with Group 1 representing 'severe' cases, Group 2 'moderately severe', Group 3 'moderate' and Group 4 'mild'mild
