Independent risk factors for recurrence of apparent life-threatening events in infants

The risk factors for recurrent apparent life-threatening event (ALTE) are unclear although the risk of recurrent ALTE is an important consideration for the management of ALTE patients. This study aimed to identify the risk factors for recurrent ALTE. We conducted a secondary analysis of the data from a single center retrospective cohort study in Japan conducted from March 2002 to January 2012, which included children diagnosed with ALTE at a pediatric emergency department (ED) in Tokyo. Among 112 ALTE patients, 18 (16%) had recurrences and 94 (84%) did not. Symptoms of respiratory tract infection (RTI) were more frequent in the recurrent group than in the non-recurrent group (44 vs. 14% p = 0.0055), and the proportion of patients triaged as level 1 was larger in the recurrent group than in the non-recurrent group (31 vs. 7%, p = 0.0312). Pallor was observed more frequently in the recurrent group than in the non-recurrent group (100 vs. 76%, p = 0.0216). Multivariate analysis demonstrated that the independent risk factors of recurrent ALTE were respiratory tract infection symptoms (OR, 5.02; 95% CI, 1.48–16.98).