Abstract
Background
Post infectious glomerulonephritis (PIGN) is the most common form of acute glomerulonephritis in children. The objective of this study was to evaluate the risk factors for kidney injury in children with PIGN referred to a tertiary care center.
Methods
This was a retrospective cohort study. The primary outcome was acute kidney injury (AKI) at initial presentation; secondary outcome was composite kidney injury, defined as reduced estimated glomerular filtration rate (eGFR), proteinuria, or hypertension at last follow-up. Binary logistic regression defined risk factors associated with the primary and secondary outcomes.
Results
We identified 125 PIGN cases with a mean age of 8.3±3.5 years at presentation and 252 ± 501 days of follow-up. Sixty-six percent (79/119) presented with AKI and 57% (71/125) were admitted to hospital. Shorter time to seeing a nephrologist (OR 6.7, 95%CI 1.8–24.6), nadir C3 < 0.12 g/L (OR 10.2, 95%CI 1.9–53.7), starting an antihypertensive medication (OR 7.6, 95%CI 1.8–31.3), and nephrotic range proteinuria (OR 3.8, 95%CI 1.2–12.4) were independent risk factors for AKI when adjusted for each other. At last follow-up 35% (44/125) of the cohort had the composite outcome, with older age at presentation (OR 1.2, 95%CI 1.04–1.4) and nadir C3 < 0.17 g/L (OR 2.6, 95%CI 1.04–6.7) being independent risk factors when adjusted for AKI.
Conclusion
PIGN is an important cause of AKI in children and adolescents. The severity of initial illness is associated with the extent of kidney injury in both the short- and longer-term. Findings will help identify cases requiring lengthier surveillance.
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Data Availability
The data that support the findings of this study are not openly available due to reasons of sensitivity and confidentiality and are available from the corresponding author upon reasonable request.
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Matsell, D.G., Cojocaru, D. & Catapang, M. Risk factors associated with short- and long-term kidney injury in children with post infectious glomerulonephritis. Pediatr Nephrol 38, 3309–3315 (2023). https://doi.org/10.1007/s00467-023-06000-1
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DOI: https://doi.org/10.1007/s00467-023-06000-1