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Factors associated with infant death after apparent life-threatening event (ALTE)
Mariana T N Romaneli1, Andréa M A Fraga, André M Morcillo
1Department of Pediatrics, Universidade Estadual de Campinas, SP, Brazil. matreneves@yahoo.com.br
Insights
Infants experiencing an apparent life-threatening event (ALTE) face increased mortality risk, especially if over six months old or if the event is prolonged. Cardiovascular disease significantly elevates this risk.
Area of Science:
- Pediatric Emergency Medicine
- Cardiology
- Neonatology
Background:
- Apparent life-threatening events (ALTEs) in infants are concerning due to potential for mortality.
- Identifying risk factors for subsequent death after an ALTE is crucial for clinical management.
Purpose of the Study:
- To determine factors associated with increased risk of death in infants following an apparent life-threatening event (ALTE).
Main Methods:
- A retrospective, cross-sectional study analyzed 145 infants under 12 months presenting with ALTE symptoms.
- Forward stepwise logistic regression (Wald) was employed to assess associations with mortality.
Main Results:
- Eleven (7.6%) infants died; those who died were older than survivors.
- Lack of spontaneous resolution (OR=14.3) and cardiovascular disease (OR=164.27) were significant predictors of death.
- Older age (>6 months) and prolonged event duration were associated with higher mortality risk.
Conclusions:
- Infants with ALTE have a higher risk of death, particularly if older than 6 months or experiencing prolonged events.
- Cardiovascular disease is a significant risk factor for mortality post-ALTE.
- Lack of spontaneous resolution during the event also indicates a poorer prognosis.
Objective:
To detect factors associated with greater risk of death in infants after an apparent life-threatening event (ALTE).
Methods:
This cross-sectional, retrospective, descriptive and analytic study evaluated infants younger than 12 months who had a sudden event of cyanosis, pallor, hypotonia or apnea and were seen in the emergency department of a tertiary university hospital. Forward stepwise logistic regression (Wald) was used to calculate and adjust odds ratios to evaluate associations.
Results:
Mean age of the 145 patients included in the study was 105 days (median = 65 days). Eleven (7.6%) died, and their mean age was 189 days (median = 218 days). Mean age of survivors was 98 days (median = 62 days) (p = 0.003). Activity before the event, prematurity and number of events were not associated with death. A significant association was found with pallor. Of the 11 infants, 3 had spontaneous resolution of ALTE, whereas 8 patients [27.6%; p < 0.001; OR = 14.3 (95%CI 3.51-58.3)] did not. The associations with respiratory or cardiovascular disease were also significant. In multivariate analysis, immediate spontaneous resolution [p = 0.015; OR = 6.06 (95%CI 1.02-35.94)] and diagnosis of cardiovascular disease [p = 0.047; OR = 164.27 (95%CI 7.34-3.673.78)] remained statistically significant.
Conclusion:
Infants who experienced an ALTE had a higher risk of subsequent death when their age was greater than 6 months and the event had a long duration, particularly when ALTE was associated with cardiovascular disease.
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