Comparison between BNP and NT-proBNP in pediatric populations

Area of Science:

• Biomarkers and Diagnostics
• Pediatric Cardiology
• Clinical Chemistry

Background:

• B-type natriuretic peptide (BNP) and N-terminal pro-B-type natriuretic peptide (NT-proBNP) are crucial for assessing cardiac conditions.
• Established pediatric reference intervals for BNP and NT-proBNP are lacking, and their concordance in pediatric patients is poorly understood.

Purpose of the Study:

• To evaluate the concordance between BNP and NT-proBNP measurements in pediatric patients.
• To analyze the correlation and agreement of these cardiac biomarkers across different pediatric age groups and cardiac pathologies.

Main Methods:

• Paired BNP and NT-proBNP testing was conducted on 311 specimens from 175 pediatric patients.
• Literature-derived pediatric reference intervals were used to assess concordance based on age and cardiac pathology.
• Deming regression and Spearman correlation analyses were employed to evaluate the relationship between BNP and NT-proBNP.

Main Results:

• A strong positive Spearman correlation (r=0.91) was observed between BNP and NT-proBNP.
• Concordance varied by age group, with highest agreement in neonates (0-10 days) and infants (31 days-2 years).
• While NT-proBNP to BNP ratios differed among cardiac conditions, overall concordance showed no significant differences; discordant serial results were generally not clinically significant.

Conclusions:

• BNP and NT-proBNP demonstrate positive correlation and moderate concordance in the studied pediatric population.
• These findings support the combined use of BNP and NT-proBNP for evaluating pediatric cardiac conditions, with consideration for age-specific interpretation.