Table 1.

Differences between BRUE and ALTE classifications

CLASSIFICATIONSBRUEALTE
Infant age< 1 yNA
Who characterizes the features of the eventClinicianCaregiver
ColourEpisodic pallor or cyanosisAny colour change
BreathingAny breathing irregularitiesApnea
ToneMarked change in muscle toneAny change in tone
Choking or gaggingNot a symptomSymptom
ResponsivenessAltered level of responsivenessNot a symptom
  • ALTE—apparent life-threatening event,

  • BRUE—brief resolved unexplained event, NA—not applicable.

  • Data from Tieder et al.17