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Continuous Age- and Sex-Adjusted Reference Intervals of Urinary Markers for Cerebral Creatine Deficiency Syndromes: A Novel Approach to the Definition of Reference Intervals
Author(s) -
Lars Mørkrid,
Alexander D. Rowe,
Katja Benedikte Prestø Elgstøen,
Jess Have Olesen,
George J. G. Ruijter,
Patricia Hall,
Silvia Tortorelli,
Andreas Schulze,
Lianna Kyriakopoulou,
Mirjam M. C. Wamelink,
Jiddeke M. van de Kamp,
Gajja S. Salomons,
Piero Rinaldo
Publication year - 2015
Publication title -
clinical chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.705
H-Index - 218
eISSN - 1530-8561
pISSN - 0009-9147
DOI - 10.1373/clinchem.2014.235564
Subject(s) - percentile , confidence interval , statistics , medicine , linear regression , creatine , mathematics
Urinary concentrations of creatine and guanidinoacetic acid divided by creatinine are informative markers for cerebral creatine deficiency syndromes (CDSs). The renal excretion of these substances varies substantially with age and sex, challenging the sensitivity and specificity of postanalytical interpretation.

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