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Nutritional status and clinical outcome of children on continuous renal replacement therapy: a prospective
Ana Castillo1, Maria J Santiago, Jesús López-Herce
1Pediatric Intensive Care Department Hospital General Universitario Gregorio Marañón, Universidad Complutense, Madrid, Spain.
Insights
Malnutrition, or protein-energy wasting, is common in critically ill children undergoing continuous renal replacement therapy (CRRT). This condition significantly increases their risk of mortality.
Area of Science:
- Pediatric Nephrology
- Critical Care Medicine
- Nutritional Science
Background:
- Nutritional status in pediatric patients receiving continuous renal replacement therapy (CRRT) remains understudied.
- Assessing the link between nutritional status and mortality in these children is crucial.
Purpose of the Study:
- To evaluate the association between nutritional status and mortality in children undergoing CRRT.
- To identify nutritional parameters linked to adverse outcomes in pediatric CRRT patients.
Main Methods:
- A prospective observational study was conducted on 174 critically ill children receiving CRRT.
- Data collected included demographics, clinical diagnoses, nutritional markers (albumin, creatinine, weight-for-age percentiles), illness severity scores, and mortality.
- Statistical analyses, including logistic regression, were used to determine associations.
Main Results:
- 35% of children were underweight (below P3), and 56% had a weight/P50 ratio < 0.85; obesity was rare.
- Protein-energy wasting was significantly associated with higher mortality (OR, 2.11; p = 0.032).
- Underweight children (< P3) exhibited a higher mortality rate (51%) compared to normal weight children (33%; p = 0.037).
Conclusions:
- Protein-energy wasting is highly prevalent in children requiring CRRT, unlike obesity.
- Children with prior end-stage renal disease or heart conditions showed higher rates of protein-energy wasting.
- Underweight status in pediatric CRRT patients is a significant predictor of increased mortality.
Background:
No studies on continuous renal replacement therapy (CRRT) have analyzed nutritional status in children. The objective of this study was to assess the association between mortality and nutritional status of children receiving CRRT.
Methods:
Prospective observational study to analyze the nutritional status of children receiving CRRT and its association with mortality. The variables recorded were age, weight, sex, diagnosis, albumin, creatinine, urea, uric acid, severity of illness scores, CRRT-related complications, duration of admission to the pediatric intensive care unit, and mortality.
Results:
The sample comprised 174 critically ill children on CRRT. The median weight of the patients was 10 kg, 35% were under percentile (P) 3, and 56% had a weight/P50 ratio of less than 0.85. Only two patients were above P95. The mean age for patients under P3 was significantly lower than that of the other patients (p = 0.03). The incidence of weight under P3 was greater in younger children (p = 0.007) and in cardiac patients and in those who had previous chronic renal insufficiency (p = 0.047). The mortality analysis did not include patients with pre-existing renal disease. Mortality was 38.9%. Mortality for patients with weight < P3 was greater than that of children with weight > P3 (51% vs 33%; p = 0.037). In the univariate and multivariate logistic regression analyses, the only factor associated with mortality was protein-energy wasting (malnutrition) (OR, 2.11; 95% CI, 1.067-4.173; p = 0.032).
Conclusions:
The frequency of protein-energy wasting in children who require CRRT is high, and the frequency of obesity is low. Protein-energy wasting is more frequent in children with previous end-stage renal disease and heart disease. Underweight children present a higher mortality rate than patients with normal body weight.
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