학술논문
Diagnostic validity of specific immunoglobulin E levels to alpha-gal in alpha-gal syndrome: a cross-sectional analysis.
Document Type
Academic Journal
Author
Germán-Sánchez A; Allergy Department, Basurto University Hospital, Bilbao, Spain. adrian.ger.san@gmail.com.; Allergy Department, Castellon University General Hospital, Avda/ Benicassim, 128, Castelló de la Plana 12004 (Castelló, Castellon, Spain. adrian.ger.san@gmail.com.; Alonso-Llamazares A; Allergy Department, Basurto University Hospital, Bilbao, Spain.; García-González F; Allergy Department, Basurto University Hospital, Bilbao, Spain.; Matala-Ahmed B; Allergy Department, Basurto University Hospital, Bilbao, Spain.; Melgar-Reyes CS; Allergy Department, Basurto University Hospital, Bilbao, Spain.; Antepara-Ercoreca I; Allergy Department, Basurto University Hospital, Bilbao, Spain.
Source
Publisher: Country of Publication: England NLM ID: 101244313 Publication Model: Electronic Cited Medium: Print ISSN: 1710-1484 (Print) Linking ISSN: 17101484 NLM ISO Abbreviation: Allergy Asthma Clin Immunol Subsets: PubMed not MEDLINE
Subject
Language
English
ISSN
1710-1484
Abstract
Background: The diagnosis of Alpha-gal Syndrome (AGS) is based on the presence of symptoms after being exposed to potential sources of alpha-gal together with values of specific IgE (sIgE) to alpha-gal ≥ 0.1 kUA/L or ≥ 0.35 kUA/L. The aim of this study was to evaluate the diagnostic validity of sIgE levels to alpha-gal ≥ 0.1 kUA/L for identifying AGS.
Methods: This was a cross-sectional analysis of adult patients with available data on sIgE levels to alpha-gal, classified into two groups according to the presence (Group 1) or absence (Group 2) of symptoms after being exposed to potential sources of alpha-gal. Values of sIgE to alpha-gal ≥ 0.1 kUA/l were considered a positive result. A descriptive analysis of internal and external validity parameters was performed in the entire population and adjusted by sex.
Results: The study included 33 individuals in Group 1 and 65 in Group 2, with a mean age of around 47 years. The analysis of internal validity parameters revealed a high sensitivity, specificity, and positive probability ratio, with higher sensitivity in men and higher specificity in women. The analysis of external validity parameters showed a high negative predictive value and global value in all populations and both sexes. However, the positive predictive value was relatively high in men, but low in women.
Conclusions: Our results suggest that sIgE levels ≥ 0.1 kUA/L may be a useful tool for the diagnosis of AGS, although other factors and diagnostic techniques should also be considered.
(© 2023. The Author(s).)
Methods: This was a cross-sectional analysis of adult patients with available data on sIgE levels to alpha-gal, classified into two groups according to the presence (Group 1) or absence (Group 2) of symptoms after being exposed to potential sources of alpha-gal. Values of sIgE to alpha-gal ≥ 0.1 kUA/l were considered a positive result. A descriptive analysis of internal and external validity parameters was performed in the entire population and adjusted by sex.
Results: The study included 33 individuals in Group 1 and 65 in Group 2, with a mean age of around 47 years. The analysis of internal validity parameters revealed a high sensitivity, specificity, and positive probability ratio, with higher sensitivity in men and higher specificity in women. The analysis of external validity parameters showed a high negative predictive value and global value in all populations and both sexes. However, the positive predictive value was relatively high in men, but low in women.
Conclusions: Our results suggest that sIgE levels ≥ 0.1 kUA/L may be a useful tool for the diagnosis of AGS, although other factors and diagnostic techniques should also be considered.
(© 2023. The Author(s).)