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Association between severity of anaphylaxis and coexistence of respiratory diseases: a systematic review and meta-analysis of observational studies

Farias-Aquino E1,3,*, Tejedor-Alonso MA1,2,*, Pérez-Fernández E1, Moro-Moro M1, Rosado-Ingelmo A1, Alberti Masgrau N4, Pérez-Codesido S1, Privitera-Torres M1

1Hospital Universitario Fundación Alcorcón, Madrid, Spain
2Facultad Ciencias de la Salud, Universidad Rey Juan Carlos, Madrid, Spain
3Escuela Internacional de Doctorado, Universidad Rey Juan Carlos, Madrid, Spain
4Hospital Universitario 12 de Octubre, Madrid, Spain
*Contributed equally to this work.

J Investig Allergol Clin Immunol 2021; Vol. 31(2)
doi: 10.18176/jiaci.0462

Background: Asthma is very prevalent in all grades of severity of anaphylaxis and asthma and Chronic obstructive pulmonary disease (COPD) have been associated with severity of anaphylaxis.
Objective: We carried out a systematic review and meta-analysis to assess the influence of respiratory diseases on the severity of anaphylaxis.
Methods: We searched PubMed/MEDLINE, EMBASE, and the Web of Science for observational studies. The target studies were those that compared the severity of anaphylaxis between patients who had or did not have respiratory diseases.
Results: A total of 13 studies assessed the severity of anaphylaxis in respiratory disease. Respiratory disease increased the severity of anaphylaxis (OR, 1.87; 95% CI, 1.30-2.70). Overall, asthma increased the severity of anaphylaxis (OR, 1.89; 95% CI, 1.26-2.83). For the meta-analysis of all studies (adjusted and non-adjusted), COPD increased the severity of anaphylaxis (OR, 2.47; 95% CI, 1.46-4.18). For asthma studies, only 1 study assessed the influence of severity of asthma on severity of anaphylaxis
Conclusions: Evidence showing that respiratory disease increases the severity of anaphylaxis is low to moderate, although studies do not usually assess the importance of severity of asthma.

Key words: Severity, Anaphylaxis, Respiratory disease, COPD, Asthma, Meta-analysis