Food-induced anaphylaxis among commercially insured US adults: patient concordance with postdischarge care guidelines

Food-induced anaphylaxis is a potentially life-threatening condition that frequently results in emergency department (ED) visits and/or hospitalization. Little information is available on patient compliance with recommended postdischarge anaphylaxis care.

To describe patient characteristics, concordance with recommended postdischarge care, and risk of repeated events among adults with an initial ED visit and/or hospitalization for food-induced anaphylaxis.

In this retrospective study of health care claims, adults with an ED visit and/or hospitalization for food-induced anaphylaxis were identified from the 2002-2008 Truven Health MarketScan Databases by using an expanded International Classification of Diseases, Ninth Revision, Clinical Modification diagnosis code algorithm. The first identified ED visit and/or hospitalization was the index event. Data from patients with continuous medical and prescription coverage for ≥1 year before and after the index event were retained for analysis. Analyses included baseline demographic and clinical characteristics, postdischarge epinephrine autoinjector (EAI) prescription fills and allergist/immunologist visits, and repeated events in the 1-year postindex period.

Patients (n = 1370) had a mean (SD) age of 44 ± 15 years, 58% were women. Most (86%) were seen in the ED and/ discharged from the ED. Within 1 year after discharge, 54% of adults had filled ≥1 EAI prescription (71% within 1 week) and 22% had ≥1 allergist/immunologist visit (53% within 4 weeks). Overall, 73 patients (5%) had evidence of a subsequent anaphylaxis-related ED visit and/or hospitalization 1 year after discharge.

Concordance with recommended postdischarge anaphylaxis care was low among adults with food-induced anaphylaxis. Within 1 year after discharge, 54% of patients filled an EAI prescription and 22% consulted an allergist/immunologist.