Related Experiment Video
Updated: Aug 8, 2026

Hydrogel Nanoparticle Harvesting of Plasma or Urine for Detecting Low Abundance Proteins
Published on: August 7, 2014
Plasma concentrations of urea and creatinine in primary school children in Ujung Pandang
1Child Health Department Medical Faculty, Hasanuddin University, Ujung Pandang.
Insights
Plasma urea levels in children were unaffected by age or sex. However, creatinine levels were higher in well-nourished children and correlated with age, suggesting age-specific normal ranges for creatinine.
Area of Science:
- Pediatric Nephrology
- Clinical Biochemistry
- Nutritional Science
Background:
- Establishing reference ranges for plasma urea and creatinine is crucial for diagnosing kidney function in children.
- Nutritional status can influence biochemical markers in pediatric populations.
Purpose of the Study:
- To determine normal plasma urea and creatinine concentrations in primary school children.
- To investigate the influence of sex, age, and nutritional status on these parameters.
- To explore correlations between plasma urea and creatinine levels.
Main Methods:
- A cross-sectional study involving 202 primary school children aged 6-15 years.
- Multi-stage random sampling was employed for participant selection.
- Plasma urea and creatinine concentrations were measured and analyzed.
Main Results:
- Plasma urea concentrations showed no significant variation with sex, age, or nutritional status.
- Plasma creatinine concentrations were significantly higher in well-nourished children compared to those with Protein-Energy Malnutrition (PEM).
- A positive correlation was observed between age and plasma creatinine levels in both well-nourished and PEM groups.
Conclusions:
- Normal plasma urea ranges are consistent across different sexes, ages, and nutritional statuses in this pediatric cohort.
- Age-specific reference values for plasma creatinine are recommended due to its correlation with age and nutritional status.
- No correlation was found between plasma urea and creatinine concentrations in the studied children.
Abstract:
A study of plasma concentrations of urea creatinine in 202 primary school children aged between 6 to 15 years was carried out in Ujung Pandang from November 1, 1988 through February 28, 1989. Sampling was done using multi-stage random sampling method. Plasma urea concentrations were not affected by sex, age and nutritional status. Normal distribution of plasma urea concentrations in P2.5 and P97.5 were 8.13 mg/dl and 24.09 mg/dl respectively (95% confidence level). There was no difference of creatinine concentration between the two sexes. The overall mean creatinine concentrations was significantly higher in the well-nourished group (0.73 +/- 0.081) mg/dl) as compared to PEM group (0.63 +/- 0.066 mg/dl). This study revealed a correlation between age and plasma creatinine concentrations in the well-nourished (r = 0.46, p less than 0.01) as well as in PEM (r = 0.37, p less than 0.01) group. Hence, normal distribution of plasma creatinine concentrations should be base on values in each age group. This study showed no correlation between plasma urea and creatinine concentrations.
Related Concept Videos
Renal Clearance
Renal clearance refers to the volume of plasma cleared of a specific substance, such as creatinine, per unit of time. To measure clearance, urine samples are collected over a 24-hour period during each bladder voiding, followed by a single blood sample at the...
Factors Affecting Renal Clearance: Renal Impairment
One condition associated with renal failure is uremia. Uremia is characterized by impaired glomerular filtration and fluid accumulation in the body. This condition hinders the renal clearance of drugs, resulting in drug accumulation and potential...
Drug Dosing in Renal Diseases: Measurement of Glomerular Filtration Rate
Drug Dosing in Renal Diseases: Measurement of Serum Creatinine Concentration and Clearance
Drug Dosing in Renal Diseases: Estimation of Glomerular Filtration Rate Based on Serum Creatinine Concentration
Serum Studies: Renal Function Tests

