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Interobserver variation in respiratory signs of severe malaria
Insights
Accurate assessment of childhood respiratory distress in malaria-endemic areas is crucial. Video analysis showed good clinician agreement on some signs but highlighted significant interobserver variation, necessitating standardized training.
Area of Science:
- Pediatrics
- Infectious Diseases
- Clinical Medicine
Background:
- Respiratory abnormalities are common in childhood malaria and acute respiratory tract infections, leading causes of mortality in sub-Saharan Africa.
- Accurate clinical assessment of disease severity is vital for appropriate management, often relying solely on clinical signs.
- Identifying reliable clinical indicators for severe disease, especially in malaria-endemic regions, remains a challenge.
Purpose of the Study:
- To evaluate interobserver agreement among clinicians on specific respiratory signs in children with potential malaria.
- To assess the utility of video recordings in examining variations in the interpretation of respiratory signs.
Main Methods:
- A prospective study involving 51 children with suspected malaria.
- Video recordings of children were used to assess the agreement between clinicians on respiratory signs like recession, nasal flaring, and deep breathing.
- Interobserver agreement was quantified using kappa statistics.
Main Results:
- Good agreement was observed for recession, severe recession, and nasal flaring (kappa = 0.57, 0.50, 0.60).
- Substantial agreement was found for deep breathing and overall respiratory distress impression (kappa = 0.70, 0.69).
- Significant variation in interpretation existed between individual clinicians, with kappa values ranging from 0.10 to 0.92.
Conclusions:
- Video analysis is effective in demonstrating interobserver variability in assessing respiratory signs in children.
- Standardizing the recognition and interpretation of clinical signs through training and potentially video methods is important for consistent diagnosis and management.
- Improved standardization can enhance the reliability of clinical assessments in diverse healthcare settings.
Abstract:
Respiratory abnormalities are common presentations of malaria and acute respiratory tract infection, both of which are major causes of childhood mortality and morbidity in sub-Saharan Africa. Appropriate management depends on accurate assessment of disease severity which for the majority of children must be based on clinical signs alone. Choosing which signs best serve this purpose remains a considerable problem particularly in malaria endemic areas. As part of a prospective study to define clinical signs indicative of life threatening malaria video recordings were used to examine the level of agreement between clinicians for potentially important respiratory signs in 51 children. Overall agreement was good for recession, severe recession, and nasal flaring (kappa = 0.57, 0.50, and 0.60 respectively) and substantial for deep breathing and the summary impression of respiratory distress (kappa = 0.70 and 0.69 respectively). However, within this substantial variation in interpretation was apparent between individual observers from slight to almost perfect agreement (kappa values 0.10-0.92). Video is a useful tool to demonstrate interobserver variation and it may also allow training in recognition of signs and a means of standardising clinical signs between centres.