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Hydroxyproline index as a tool for nutrition status surveys in malarial regions
Insights
The urinary hydroxyproline index can indicate nutrition status in children under five, but malaria significantly impacts results. This biochemical marker is most valuable for nutritional assessment when combined with other methods in endemic regions.
Area of Science:
- Biochemistry
- Pediatrics
- Public Health
Background:
- Assessing nutritional status in young children is crucial for public health interventions.
- Mass surveys require efficient and reliable biochemical indicators.
- The urinary hydroxyproline index has been proposed as a potential marker for nutritional status.
Purpose of the Study:
- To evaluate the efficiency of the urinary hydroxyproline index for assessing nutrition status in mass surveys.
- To investigate the influence of tropical parasitic diseases, particularly malaria, on the index.
- To determine the index's utility in children under five years old in rural Zambia.
Main Methods:
- Biochemical analysis of urinary hydroxyproline index in 364 children under five.
- Data collected during the National Nutrition Status Survey of the Republic of Zambia.
- Analysis correlated index with age, weight-for-age nutritional status, and presence of malaria parasites.
Main Results:
- The hydroxyproline index was not age-dependent in children under five in rural Zambia.
- Lower nutritional status (weight-for-age) correlated with a lower hydroxyproline index.
- Malaria parasites in the blood significantly lowered the hydroxyproline index, complicating interpretation.
Conclusions:
- The urinary hydroxyproline index has value in surveys but requires complementary assessments.
- In malaria-endemic areas, the index's utility is limited unless malaria is concurrently assessed.
- Interpretation of the hydroxyproline index is complex in the presence of malaria.
Abstract:
1. The efficiency of the urinary hydroxyproline index as an indicator of nutrition status in mass surveys was investigated. The index was determined in 364 children aged under 5 years who participated in the National Nutrition Status Survey of the Republic of Zambia. The results of these biochemical investigations are given for all children and also according to the presence of various tropical parasitic diseases. 2. In rural areas of Zambia the hydroxyproline index was not related to the age of the child during the first 5 years of life. A lower nutritional status as defined by weight-for-age was associated with a lower hydroxyproline index. 3. The main factor affecting the index was the presence of malaria parasites in the blood. Malaria was associated with a lower index in all circumstances investigated, including children with definite growth failure. The mean of the index for healthy children was 2-49. 4. It is concluded that the index is of value in surveys but only in addition to other assessments of nutritional status. In regions where malaria is endemic the index may be of little value in determining nutritional status unless the presence of malaria parasites in the blood is investigated in all subjects and interpretation of the hydroxyproline index where malaria is confirmed is very complex.