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Background: Cow’s milk allergy can result in anaphylactic reactions. The estimated prevalence of cow’s milk allergy in developed countries ranges from 0.5% to 3% at age 1 year. Objective: Our objective was to perform a systematic review and, if possible, a meta-analysis to assess the frequency of fatal and recurrent anaphylaxis induced by cow’s milk. Methods: We searched PubMed/MEDLINE, EMBASE, and the Web of Science for studies that had assessed fatal and recurrent anaphylaxis induced by cow’s milk for the population of a country or at least an administrative region. Our review included cohort, cross-sectional, and registry studies that had assessed the incidence or prevalence of recurrent anaphylaxis or the incidence of fatal anaphylaxis due to cow’s milk. Results: The pooled prevalence of recurrence (PR) for at least an episode of anaphylaxis was 26.98% (3.41-155.19). Teymourpour et al (Iran) reported the highest PR (53.10%); the 2 studies with the lowest PR were from France (5.16 and 0.42 respectively) (p |
