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Laser immunonephelometry reference intervals for eight serum proteins in healthy children
D J Malvy1, J D Povéda, M Debruyne
1Unité de Recherches en Hépatologie pédiatrique, INSERM U056, Bicêtre, France.
Insights
This study analyzed eight serum proteins in healthy French children aged 3-16. Results show sex and age influence immunoglobulin M (IgM) and albumin levels, providing key reference intervals.
Area of Science:
- Clinical Chemistry
- Pediatric Medicine
- Immunology
Background:
- Serum protein levels can vary significantly with age and sex in pediatric populations.
- Establishing reference intervals is crucial for accurate clinical interpretation of diagnostic tests.
- Understanding normal variations aids in identifying potential health issues in children.
Purpose of the Study:
- To determine reference intervals for eight key serum proteins in healthy French children.
- To investigate the influence of age and sex on serum protein concentrations.
- To provide a basis for interpreting C-reactive protein levels in a community setting.
Main Methods:
- Serum samples from 479 healthy French children (ages 3-16) were analyzed.
- The Behring nephelometer was used for quantitative analysis of eight specific serum proteins.
- Statistical analysis was performed to identify variations based on age and sex.
Main Results:
- Significant differences in immunoglobulin M (IgM) and albumin concentrations were observed between girls and boys.
- Age was identified as a primary factor influencing the levels of most tested serum proteins.
- Reference intervals were established for IgG, IgA, IgM, albumin, transthyretin, retinol-binding protein, alpha 1-acid glycoprotein, and C-reactive protein.
Conclusions:
- Age and sex are critical determinants of serum protein levels in children.
- The established reference intervals are valuable for pediatric diagnostics and health assessments.
- The study highlights the importance of considering demographic factors in clinical interpretations, particularly for C-reactive protein.
Abstract:
Eight serum proteins were analyzed with the Behring nephelometer in samples from 479 healthy French children, ages three to 16 years. Girls had higher concentrations of IgM and albumin than boys had. Age appeared to be a main factor of variation for the proteins tested. Reference intervals are presented for IgG, IgA, IgM, albumin, transthyretin (prealbumin), retinol-binding protein, alpha 1-acid glycoprotein, and C-reactive protein. The significance of increased concentrations of C-reactive protein within a community is discussed.