title: CLSI-based transference of the CALIPER database of pediatric reference intervals to Beckman Coulter DxC biochemical assays.
abstract: BACKGROUND
  The CALIPER program has established a comprehensive database of age- and sex-stratified pediatric reference intervals for over 85 common biochemical markers, largely using the Abbott ARCHITECT assays. To allow a broader application of the CALIPER database, we examined transference to 36 Beckman Coulter Synchron Unicel DxC800 assays, based on the CLSI C28-A3/EP9-A3 guidelines.
  
  
  METHODS
  Patient sample comparisons were performed for 36 biochemical assays using 200 serum specimens obtained from pediatric patients on the Abbott ARCHITECT ci8200 and the Beckman Coulter DxC800. For each analyte, R(2) values were calculated to assess the quality of correlation between the platforms. Statistical criteria used to assess transferability included a) regression analysis to create the equation of the line of best fit, b) standardized residual, c) Bland-Altman, and d) quantile-quantile plots. Transferred reference intervals were further verified by analyzing serum samples from 100 healthy children from the CALIPER cohort on the Beckman Coulter system.
  
  
  RESULTS
  The reference intervals for most of the assessed analytes were transferable to Beckman Coulter assays (31 out of 36 studied) and the newly calculated reference intervals were verified through analysis of CALIPER reference samples (28 out of 31). Eighteen assays demonstrated excellent correlation (R(2)≥0.95), and 13 assays showed strong correlation (0.77≤R2≤0.94).
  
  
  CONCLUSIONS
  The current study allowed successful transference of a large number of biochemical markers from the CALIPER database to assays on the Beckman Coulter DxC800 platform. Transference should facilitate broader application of CALIPER reference intervals at pediatric centers using DxC biochemical assays.
authors.affiliation: CALIPER Program, Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, ON, Canada.
authors.forename: Petra A T
authors.initials: PA
authors.lastname: Araújo
authors.affiliation: CALIPER Program, Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, ON, Canada.
authors.forename: Dylan
authors.initials: D
authors.lastname: Thomas
authors.affiliation: CALIPER Program, Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, ON, Canada.
authors.forename: Tara
authors.initials: T
authors.lastname: Sadeghieh
authors.affiliation: CALIPER Program, Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, ON, Canada.
authors.forename: Victoria
authors.initials: V
authors.lastname: Bevilacqua
authors.affiliation: CALIPER Program, Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, ON, Canada.
authors.forename: Man Khun
authors.initials: MK
authors.lastname: Chan
authors.affiliation: CALIPER Program, Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, ON, Canada.
authors.forename: Yunqi
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada; Eastern Health, St. John's, NL, Canada.
authors.forename: Edward
authors.initials: E
authors.lastname: Randell
authors.affiliation: CALIPER Program, Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, ON, Canada. Electronic address: khosrow.adeli@sickkids.ca.
authors.forename: Khosrow
authors.initials: K
authors.lastname: Adeli
mesh_terms: D000293:Adolescent; D001681:Biological Assay / Q000379:methods*; D002648:Child; D002675:Child, Preschool; D016208:Databases, Factual; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D010372:Pediatrics / Q000379:methods*; D012015:Reference Standards; D012016:Reference Values; D015203:Reproducibility of Results; D013223:Statistics as Topic; D055815:Young Adult
keywords: Adolescents; Biochemical markers; CALIPER; CLSI; Children; Pediatric; Reference intervals; Transference