Volatile organic compounds in asthma diagnosis: a systematic review and meta-analysis

• Type: Another Publication in an International Scientific Journal
• Date: 2016

Authors

Rufo, JC (Author) Other; Madureira, J (Author) Other; Fernandes, EO (Author) Other; Moreira, André (Author) FMUP

Journal

Title: Allergy: European Journal of Allergy and Clinical Immunology

Vol. 71

Pages: 175-188

ISSN: 0105-4538

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 46 Citations

Scopus - 50 Citations

Other information

Authenticus ID: P-00K-3FT

DOI: 10.1111/all.12793

Abstract (EN): We aimed to assess the value and classification rate of exhaled volatile organic compounds (VOCs) in asthma diagnosis. A PRISMA-oriented systematic search for published studies regarding exhaled VOCs in asthma diagnosis was conducted based on predefined criteria. Studies presenting sensitivity and specificity values for the test were included in the meta-analysis. Pooled diagnosis odds ratios (DOR), area under the curve (AUC) and positive and negative likelihood ratios (LR) for exhaled VOC profiles were calculated; and publication bias, threshold effect and heterogeneity were estimated. Eighteen studies were selected for the qualitative analysis and six met the criteria for inclusion in the quantitative analysis. Mean (95% CI) pooled DOR, positive and negative LR were 49.3 (15.9-153.3), 5.86 (3.07-11.21) and 0.16 (0.10-0.26), respectively. The AUC value was 0.94. Only three of the 18 reviewed studies performed an external validation of the model using a different data set. The results from the revised studies suggest that exhaled VOCs are promising biomarkers for asthma diagnosis and that several compounds, mainly alkanes, may be significantly associated with asthma inflammation. However, there are still various constraints associated with standardization and externally validated studies are needed to introduce exhaled VOC profiling in a clinical scenario.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 14