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Alternative anthropometric indicators of mortality
Insights
Anthropometric indicators like weight-for-age and height-for-age effectively predict child mortality over one year. Weight velocity shows promise for identifying short-term mortality risks in young children.
Area of Science:
- Pediatric Nutrition
- Public Health
- Biostatistics
Background:
- Child mortality remains a significant global health challenge, particularly in developing regions.
- Anthropometric indicators are commonly used to assess child growth and nutritional status.
- Identifying reliable predictors of mortality is crucial for timely interventions.
Purpose of the Study:
- To evaluate the effectiveness of various anthropometric indicators in discriminating mortality among children aged 1-4 years.
- To compare the predictive power of static indicators (weight-for-age, height-for-age, weight-for-height) versus dynamic indicators (weight velocity, height velocity).
- To assess the utility of these indicators across different seasonal time frames.
Main Methods:
- Analysis of data from approximately 1,000 children (1-4 years) in Matlab, Bangladesh.
- Assessment of mortality-discriminating power using standard deviation differences between living and deceased children's indicator values.
- Evaluation of maximum sensitivity and specificity, and visual representation of mortality curves by nutritional status.
- Statistical significance tested using the t-test.
Main Results:
- Weight-for-age and height-for-age demonstrated superior ability to discriminate one-year mortality compared to weight velocity and height velocity.
- Weight velocity showed potential as a good indicator for short-term mortality prediction.
- The discriminating power varied slightly depending on the starting season of the assessment period.
Conclusions:
- Weight-for-age and height-for-age are robust indicators for predicting one-year child mortality.
- Weight velocity holds promise for identifying children at imminent risk of short-term mortality.
- Anthropometric indicators provide valuable insights into child survival, with distinct roles for long-term and short-term risk assessment.
Abstract:
The ability of anthropometric indicators, weight-for-age, height-for-age, weight-for-height, weight velocity, and height velocity to discriminate mortality during a one-year period is examined for three time frames beginning in different seasons. Data on approximately 1,000 children of one to four years of age come from the Matlab, International Centre for Diarrhoeal Disease Research, Bangladesh. The indicators' mortality-discriminating power is assessed in terms of the magnitude of difference between the mean indicator values of living and dead children expressed in standard deviation units and of the maximum sum of sensitivity and specificity. The indicators' mortality curve by nutritional status shows the discriminating power visually; the t test indicates its statistical significance. Weight-for-age and height-for-age perform better than weight velocity and height velocity as discriminators of mortality during a one-year period. The ability of weight and height velocity to discriminate short-term mortality is examined by comparing the mean velocity of the last two bimonthly intervals of the dead children. Weight velocity is likely to be a good indicator of short-term mortality.