BACKGROUND: Phadiatop is a commercially available qualitative serological test employed for screening of allergic sensitization in patients with suspected allergic diseases. AIM: The study evaluated the diagnostic accuracy of Phadiatop for the diagnosis of allergic sensitization in a general adult population. METHODS: A total of 469 subjects from the population of A-Estrada (Spain) were selected by age-stratified random sampling (age range, 18-92 years). Phadiatop test (Uni-CAP method) was performed in serum samples from 465 of these subjects. Skin prick tests to a panel of 13 relevant aeroallergens in the studied area (including mites, pollens, moulds, and animal dander) were employed as the reference diagnostic procedure. Subjects with at least a positive skin prick test (> or =4 mm, n= 120) were considered to have allergic sensitization. RESULTS: Phadiatop sensitivity was 70.8% (95% CI 61.7-78.6%), specificity 90.7% (95% CI 87.0-93.5%), positive predictive value 72.6% (95% CI 63.5-80.3%), negative predictive value 89.9% (95% CI 86.2-92.8%), global accuracy 85.6% (95% CI 82.0-88.6%), negative likelihood ratio 0.3 (95% CI 0.2-0.4), and positive likelihood ratio 7.6 (95% CI 5.4-10.8). A high proportion of false-positive Phadiatop cases showed (a) increased total serum IgE levels, (b) significant alcohol consumption, and (c) small-sized (below the diagnostic cut-off) wheal reactions on SPT. A high proportion of false-negative Phadiatop cases showed exclusive storage mite sensitization. Sensitivity and positive predictive value of Phadiatop were somewhat higher among individuals with a history of nasal or bronchial symptoms. CONCLUSIONS: Phadiatop is a valuable tool for the diagnosis of allergic sensitization in a general adult population. However, limitations of the test should be taken into account in similar surveys.
BACKGROUND: Phadiatop is a commercially available qualitative serological test employed for screening of allergic sensitization in patients with suspected allergic diseases. AIM: The study evaluated the diagnostic accuracy of Phadiatop for the diagnosis of allergic sensitization in a general adult population. METHODS: A total of 469 subjects from the population of A-Estrada (Spain) were selected by age-stratified random sampling (age range, 18-92 years). Phadiatop test (Uni-CAP method) was performed in serum samples from 465 of these subjects. Skin prick tests to a panel of 13 relevant aeroallergens in the studied area (including mites, pollens, moulds, and animal dander) were employed as the reference diagnostic procedure. Subjects with at least a positive skin prick test (> or =4 mm, n= 120) were considered to have allergic sensitization. RESULTS: Phadiatop sensitivity was 70.8% (95% CI 61.7-78.6%), specificity 90.7% (95% CI 87.0-93.5%), positive predictive value 72.6% (95% CI 63.5-80.3%), negative predictive value 89.9% (95% CI 86.2-92.8%), global accuracy 85.6% (95% CI 82.0-88.6%), negative likelihood ratio 0.3 (95% CI 0.2-0.4), and positive likelihood ratio 7.6 (95% CI 5.4-10.8). A high proportion of false-positive Phadiatop cases showed (a) increased total serum IgE levels, (b) significant alcohol consumption, and (c) small-sized (below the diagnostic cut-off) wheal reactions on SPT. A high proportion of false-negative Phadiatop cases showed exclusive storage mite sensitization. Sensitivity and positive predictive value of Phadiatop were somewhat higher among individuals with a history of nasal or bronchial symptoms. CONCLUSIONS: Phadiatop is a valuable tool for the diagnosis of allergic sensitization in a general adult population. However, limitations of the test should be taken into account in similar surveys.
Authors: David Vizcaya; Maria C Mirabelli; David Gimeno; Josep-Maria Antó; George L Delclos; Marcela Rivera; Ramon Orriols; Lourdes Arjona; Felip Burgos; Jan-Paul Zock Journal: Occup Environ Med Date: 2015-04-23 Impact factor: 4.402
Authors: Laia Font-Ribera; Manolis Kogevinas; Jan-Paul Zock; Federico P Gómez; Esther Barreiro; Mark J Nieuwenhuijsen; Pilar Fernandez; Carolina Lourencetti; Maitane Pérez-Olabarría; Mariona Bustamante; Ricard Marcos; Joan O Grimalt; Cristina M Villanueva Journal: Environ Health Perspect Date: 2010-11 Impact factor: 9.031