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Validation of caregiver interviews to diagnose common causes of severe neonatal illness
H D Kalter1, M Hossain, G Burnham
1Department of International Health, Johns Hopkins School of Hygiene and Public Health, Baltimore, MD 21205, USA.
Insights
Caregiver interviews can accurately diagnose major causes of severe neonatal illness and death, even in areas with limited medical access. This method validates retrospective data for understanding infant health outcomes.
Area of Science:
- Neonatal Health
- Epidemiology
- Medical Diagnostics
Background:
- Diagnosing severe neonatal illness is challenging in resource-limited settings.
- Accurate diagnosis is crucial for effective public health interventions and understanding mortality causes.
Purpose of the Study:
- To validate retrospective caregiver interviews for diagnosing common causes of severe neonatal illness and death.
- To assess the accuracy of caregiver-reported signs and symptoms in identifying specific neonatal conditions.
Main Methods:
- A study in Dhaka, Bangladesh, involved 149 infants (<28 days) with suspected severe illnesses.
- Paediatricians conducted standardized examinations and tests; caregivers were interviewed a median of 64.5 days post-discharge/death.
- Algorithms based on caregiver reports were validated against reference diagnoses using sensitivity and specificity.
Main Results:
- Caregiver interviews achieved >80% sensitivity and specificity for neonatal tetanus, low birthweight/severe malnutrition, and preterm delivery.
- For birth asphyxia and pneumonia, algorithms showed high specificity (>80%) but lower sensitivity (<70%), or vice versa.
- The study identified specific algorithms with high diagnostic accuracy for several key neonatal conditions.
Conclusions:
- Retrospective caregiver interviews offer a valid and feasible method for diagnosing several leading causes of severe neonatal illness and death.
- This approach is particularly valuable in settings with limited access to advanced medical diagnostic capabilities.
- The findings support the use of caregiver interviews in epidemiological studies and health surveillance of neonates.
Abstract:
The objective of this study was to validate retrospective caregiver interviews for diagnosing major causes of severe neonatal illness and death. A convenience sample of 149 infants aged < 28 days with one or more suspected diagnoses of interest (low birthweight/severe malnutrition, preterm birth, birth asphyxia, birth trauma, neonatal tetanus, pneumonia, meningitis, septicaemia, diarrhoea, congenital malformation or injury) was taken from patients admitted to two hospitals in Dhaka, Bangladesh. Study paediatricians performed a standardised history and physical examination and ordered laboratory and radiographic tests according to study criteria. With a median interval of 64.5 days after death or hospital discharge, caregivers of 118 (79%) infants were interviewed about their child's illness. Using reference diagnoses based on predefined clinical and laboratory criteria, the sensitivity and specificity of particular combinations of signs (algorithms) reported by the caregivers were ascertained. Sufficient numbers of children with five reference standard diagnoses were studied to validate caregiver reports. Algorithms with sensitivity and specificity > 80% were identified for neonatal tetanus, low birthweight/severe malnutrition and preterm delivery. Algorithms with specificities > 80% for birth asphyxia and pneumonia had sensitivities < 70%, or alternatively had high sensitivity with lower specificity. In settings with limited access to medical care, retrospective caregiver interviews provide a valid means of diagnosing several of the most common causes of severe neonatal illness and death.