Increased incidence of admissions for anaphylaxis in Spain 1998–2011

AbstractWe report on trends in anaphylaxis admissions in the Spanish hospital system during the period 1998–2011. Data on admissions for anaphylaxis were obtained from the Spanish Information System for Hospital Data for the period 1998–2011. Patients were selected using the codes for anaphylaxis in the International Classification of Diseases, Ninth Revision, Clinical Modification (ICD‐9‐CM). Poisson regression models were used to estimate incidence rate ratios. We recorded a 1.89‐fold increase in admissions for anaphylaxis in Spanish hospitals during the study period, particularly in patients aged 0–14 years (1.65‐ to 3.22‐fold until 2009 and 4.09‐ to 12.59‐fold until 2011) and in food anaphylaxis in all age groups (2.78‐fold until 2009 and 8.74‐fold until 2011). The incidence of anaphylaxis is perceived as having increased in recent years, especially anaphylaxis caused by food and anaphylaxis affecting the pediatric population.