title: Establishment of complete blood count reference intervals for Chinese preschoolers.
abstract: BACKGROUND
  Reference intervals are critical for interpreting test results of a clinical laboratory. The aim of this study was to establish local reference intervals of complete blood count for healthy preschoolers in China.
  
  
  METHODS
  Three thousand eight hundred and twenty-one blood specimens from children aged 4 months to 6 years were collected and analyzed. Complete blood counts were determined by Sysmex XT-4000i Automated Hematology Analyzer. The nonparametric 2.5th to 97.5th percentile reference ranges were calculated according to CLSI EP28-A3c guideline.
  
  
  RESULTS
  Reference intervals for each blood cell parameter are determinded as follows: total WBC 4.86-12.1×109/L for males and 4.73-12.3×109/L for females; RBC 4.13-5.32×1012/L for males and 4.08-5.24×1012/L for females; HGB 109-145 g/L for males and 111-143 g/L for females; HCT 33.1-41.2% for males and 33.3-41.1% for females; MCH 23.5-29.7 pg for males and 24.6-30.0 pg for females; MCHC 320-365 g/L for males and 321-362 g/L for females; MCV 71.4-85.1 fL for males and 73.8-86.9 fL for females; RDW-SD 33.5-41.9 fL for males and 33.5-41.0 fL for females; RDW-CV 12.0-15.2% for males and 11.8-14.5% for females; PLT 181-475×109/L for males and 179-456×109/L for females; PCT 0.18-0.44% for males and 0.18-0.43% for females; MPV 8.20-11.6 fL for males and 8.20-11.5 fL for females; PDW 8.40-14.4 fL for males and 8.40-14.0 fL for females; P-LCR 12.0-36.6% for males and 11.8-35.6% for females.
  
  
  CONCLUSIONS
  We established local complete blood count reference intervals for apparent healthy preschoolers in China. It is necessary to establishing region-specific reference intervals of complete blood count for preschoolers.
authors.affiliation: Department of Clinical Laboratory, Shunyi Maternal and Children's Hospital of Beijing Children's Hospital, Shunyi, Beijing, China.
authors.forename: Guo-Cheng
authors.initials: GC
authors.lastname: Wang
authors.affiliation: Department of Clinical Laboratory, Shunyi Maternal and Children's Hospital of Beijing Children's Hospital, Shunyi, Beijing, China.
authors.forename: Na
authors.initials: N
authors.lastname: Li
authors.affiliation: Tianjin Medical University, Tianjin, China.
authors.forename: Cui
authors.initials: C
authors.lastname: Niu
authors.affiliation: Hebei Medical University, Shijiazhuang, Hebei, China.
authors.forename: Wei-Bo
authors.initials: WB
authors.lastname: Ma
authors.affiliation: Department of Clinical Laboratory, Shunyi Maternal and Children's Hospital of Beijing Children's Hospital, Shunyi, Beijing, China.
authors.forename: Zhu-Liang
authors.initials: ZL
authors.lastname: Wang
authors.affiliation: Department of Clinical Laboratory, Shunyi Maternal and Children's Hospital of Beijing Children's Hospital, Shunyi, Beijing, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Guo
authors.affiliation: Department of Clinical Laboratory, Shunyi Maternal and Children's Hospital of Beijing Children's Hospital, Shunyi, Beijing, China.
authors.forename: Li-Hong
authors.initials: LH
authors.lastname: Han
mesh_terms: D044466:Asian People / Q000706:statistics & numerical data*; D001772:Blood Cell Count / Q000592:standards* / Q000706:statistics & numerical data*; D002648:Child; D002675:Child, Preschool; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012016:Reference Values
keywords: complete blood count; preschoolers; reference intervals