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Preadmission antipyretics in Reye's syndrome
S M Hall1, P A Plaster, J F Glasgow
1Public Health Laboratory Service, Communicable Disease Surveillance Centre, London.
Insights
Aspirin use before illness was more common in children with Reye's syndrome compared to those with other febrile illnesses. This suggests a potential link between aspirin exposure and Reye's syndrome development in children.
Area of Science:
- Pediatric Epidemiology
- Neurology
- Pharmacology
Background:
- Reye's syndrome is a rare but serious condition affecting children.
- Previous studies have suggested a possible association between aspirin use and Reye's syndrome.
- Understanding medication exposure is crucial for identifying risk factors.
Purpose of the Study:
- To compare preadmission medication exposure rates between children with Reye's syndrome and those with febrile illnesses.
- To investigate the association between aspirin or paracetamol use and Reye's syndrome.
- To explore potential age-related differences in aspirin exposure.
Main Methods:
- A case-control study involving interviews with parents of children diagnosed with Reye's syndrome (cases) and children with febrile illnesses (comparisons).
- Data collected on medication use, specifically aspirin and paracetamol, in the three weeks prior to hospital admission.
- Statistical analysis to compare medication exposure rates between the two groups and assess correlations.
Main Results:
- Significantly higher aspirin exposure was observed in Reye's syndrome cases (59%) compared to controls (26%).
- Paracetamol use was significantly higher in the comparison group (49%) than in Reye's syndrome cases (25%).
- Aspirin exposure showed a positive correlation with the diagnostic criteria severity for Reye's syndrome, particularly in children under 5.
Conclusions:
- The study suggests a potential association between aspirin use and Reye's syndrome in children.
- Despite inherent biases in epidemiological studies, the findings warrant further investigation into aspirin as a risk factor.
- Paracetamol does not appear to be associated with Reye's syndrome based on this study.
Abstract:
The parents of 106 children who had had Reye's syndrome and those of 185 comparison children who had febrile illnesses were interviewed in order to compare preadmission medication exposure rates in the two groups. Although comparable proportions of case and comparison patients had taken antipyretics in the three weeks before admission, a significant excess of cases (59% compared with 26% in the comparisons) had been given aspirin, whereas significantly more comparison children (49% compared with 25% in the cases) had taken paracetamol. There was an excess exposure to aspirin in children under 5 years of age; the excess observed in older patients just failed to reach significance. Separate analyses within Northern Ireland and England also showed a case-comparison difference. A significant correlation was shown between aspirin (but not paracetamol) exposure and the closeness with which cases conformed to the diagnostic criteria of Reye's syndrome, measured by an artibrary score. The many difficulties of conducting and interpreting the findings of an epidemiological risk factor study of an association between aspirin and Reye's syndrome are reviewed and emphasised. Inherent biases were present in this as in previous studies and it did not conform to the classical case-control design. Nevertheless the findings suggested that an association between Reye's syndrome and preadmission aspirin may exist in some children.