"qualitative impairment" is a correct and usable phrase in written English.
You could use it to describe a situation in which something has been reduced to a lower level of quality. For example: "The qualitative impairment in the quality of the product was evident from the complaints we received."
Chondromalacia via pathologic changes in cartilage may lead to qualitative impairment of knee joint motion.
A diagnostic hallmark of autism spectrum disorders is a qualitative impairment in social communication and interaction.
These findings suggest that children with PDD not only suffer from impairments in "qualitative impairment in social interaction" and "adapting to change," but also have underdeveloped use of pointing, and impairments in "joint visual attention," conceptualizing spatial relationships and language functions.
It is characterized by qualitative impairment in social interaction, by stereotyped and restricted patterns of behavior, activities and interests, and by no clinically significant delay in cognitive development or general delay in language.
However, many studies have shown that the loss and qualitative impairment of HIV-specific T-cell help occurs very early in infection and cannot therefore be predicted by the overall numbers of circulating CD4+ T-cells.
Aging is associated with degenerative changes in articular surfaces leading to quantitative and qualitative impairment of joint motion.
Given the limitations of the study, it is of great interest to further explore the qualitative impairments in driving performance associated with cannabis and alcohol separately and how these impairments may manifest in terms of crash characteristics.
the aim of our study is to suppose that homosexuality may be a behavioural syndrome that consists of qualitative impairments in social interaction, caused by a chronic bowel inflammatory state.
Autism is a disorder characterized by alterations present since the age of three and by qualitative impairments in communication and social interaction and by the presence of restricted patterns of interest and behavior.
Qualitative impairments in reciprocal social interaction and communication form two elements of the autism triad.
"Lacks facial expression" and "stripping in public" can be regarded as qualitative impairments in reciprocal social interactions and "delayed echolalia" and "odd intonation" as qualitative impairments of verbal and non-verbal communication.
