In the past, doctors separated people with asthma into two groups, those with "allergic asthma" (about 2/3rds of people) and those with "non-allergic asthma". These labels are not much used now as the treatments for all people with asthma don't depend on this classification. However, new treatments for asthma may become available and the classification may again become important. It could be useful for clinicians to know how to identify which patients are likely to benefit from particular treatments. Additionally, some new blood tests are becoming available and some of these might help to categorise the type of asthma people have. What the study hopes to do is to identify patient features which make a diagnosis of "allergic asthma" more likely and to see which new blood tests are most likely to be helpful in confirming this diagnosis.
Study Type
OBSERVATIONAL
Enrollment
105
NSHI Ltd
Dartford, Kent, United Kingdom
Serum periostin level
This is a cross sectional study. Participants will be assessed and tests conducted at a single visit
Time frame: 1 day
skin prick test
Time frame: 1 day
Serum total IgE
Time frame: 1 day
Blood eosinophil count
Time frame: 1 day
Blood neutrophil count
Time frame: 1 day
Blood CD4 cells that are positive for CRTh2
Time frame: 1 day
Blood eosinophils expressing CRTh2
Time frame: 1 day
Spirometry
Time frame: 1 day
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