The relationship between body weight, cystatin C and serum creatinine in neonates

Kandasamy, Y., Rudd, D., and Smith, R. (2017) The relationship between body weight, cystatin C and serum creatinine in neonates. Journal of Neonatal-Perinatal Medicine, 10 (4). pp. 419-423.

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Background: Serum creatinine (SCr) measurement to determine glomerular filtration rate (GFR) in neonates has many pitfalls. Cystatin C (CysC) appears to be a more reliable biomarker.

Methods: We investigated the effect of birth weight on SCr and CysC measurements in a cohort of 74 infants, consisting of both term and ex-premature infants at term postmenstrual age. SCr and Cys C measurements were carried out at the same time.

Results: Eighty six infants were recruited into this study out of which complete data were available in 80 infants. The cohort consists of both term and premature infants at term PMA (31 terms and 49 preterms). The median SCr level was 17 [12–26] umol/L and mean CysC level was 1.64 [0.27] mg/L. SCr had a significant correlation with weight (r = 0.3; P = 0.011), whereas serum CysC had no correlation with the infant’s weight (r = 0.01; P = 0.95). There were no statistically significant difference in SCr and CysC between male and female infants.

Conclusion: Unlike CysC, SCr had a significant correlation with birth weight. SCr based GFR measurement may cause a delay in diagnosis of acute kidney injury in smaller neonates.

Item ID: 52540
Item Type: Article (Research - C1)
ISSN: 1878-4429
Keywords: Cystatin C; creatinine; AKI; neonates; renal function
Funders: National Health and Medical Research Council (NHMRC)
Date Deposited: 28 Jun 2018 02:00
FoR Codes: 32 BIOMEDICAL AND CLINICAL SCIENCES > 3202 Clinical sciences > 320202 Clinical chemistry (incl. diagnostics) @ 50%
32 BIOMEDICAL AND CLINICAL SCIENCES > 3213 Paediatrics > 321303 Neonatology @ 50%
SEO Codes: 92 HEALTH > 9201 Clinical Health (Organs, Diseases and Abnormal Conditions) > 920119 Urogenital System and Disorders @ 100%
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