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Low body weight: a simple indicator of the risk of dehydration among children with diarrhoea
C G Victora1, S C Fuchs, B R Kirkwood
1Departamento de Medicina Social, Universidade Federal de Pelotas, Brazil.
Insights
Low body weight in children under two years old is a simple, effective predictor of severe dehydration from diarrhea. This finding aids healthcare workers in developing nations to quickly identify at-risk infants.
Area of Science:
- Pediatrics
- Public Health
- Global Health
Background:
- Diarrhoea is a leading cause of dehydration in young children, particularly in developing countries.
- Early identification of children at high risk of dehydration is crucial for effective healthcare intervention.
- Existing methods for assessing dehydration risk can be complex or rely on early symptoms that may not be apparent.
Purpose of the Study:
- To identify simple prognostic factors for early detection of severe dehydration in children under two years with diarrhoea.
- To evaluate the effectiveness of low body weight as a predictor compared to other anthropometric indices and early clinical signs.
Main Methods:
- A case-control study comparing children under two years with diarrhoea and moderate to severe dehydration against matched controls with uncomplicated diarrhoea.
- Assessment of various prognostic factors, including anthropometric measurements (low body weight, weight-for-age, weight-for-length, length-for-age) and early signs/symptoms.
Main Results:
- Low body weight was strongly associated with the risk of severe dehydration.
- A cut-off of 7.0 kg for low body weight demonstrated a sensitivity of 75% and a specificity of 68%.
- Low body weight proved superior to more complex anthropometric indices and early clinical signs in predicting dehydration risk.
Conclusions:
- Low body weight is a simple and effective indicator for predicting severe dehydration in young children presenting with diarrhoea.
- This simple measure can significantly aid healthcare workers in resource-limited settings for timely risk assessment.
- Low body weight may reflect combined effects of young age and malnutrition, making it a robust predictor.
Abstract:
The early identification of children at high risk of dehydration as a consequence of diarrhoea would be of great value for health care workers in developing countries. By comparing children aged less than two years with diarrhoea and moderate to severe dehydration with matched controls who had uncomplicated diarrhoea, a number of prognostic factors were assessed. Low body weight, regardless of age, was strongly associated with the risk of dehydration; using 7.0 kg as a cut-off, it had a sensitivity of 75% and a specificity of 68%. Low body weight was superior to more complex anthropometric indices, including weight for age, weight for length or length for age, and also to early signs and symptoms during the episode. By reflecting the effects of both young age and those of malnutrition, low body weight may prove to be a simple indicator for predicting dehydration among children with diarrhoea presenting at a health service.