Annals of Laboratory Medicine

Korean Society for Laboratory Medicine (대한진단검사의학회)
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Complete Blood Count Reference Intervals and Patterns of Changes Across Pediatric, Adult, and Geriatric Ages in Korea

  • Nah, Eun-Hee (Department of Laboratory Medicine and Health Promotion Research Institute, Korea Association of Health Promotion) ;
  • Kim, Suyoung (Department of Laboratory Medicine and Health Promotion Research Institute, Korea Association of Health Promotion) ;
  • Cho, Seon (Department of Laboratory Medicine and Health Promotion Research Institute, Korea Association of Health Promotion) ;
  • Cho, Han-Ik (MEDIcheck LAB, Korea Association of Health Promotion)
  • Received : 2017.07.10
  • Accepted : 2018.06.27
  • Published : 2018.11.01
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Abstract

Background: Sampling a healthy reference population to generate reference intervals (RIs) for complete blood count (CBC) parameters is not common for pediatric and geriatric ages. We established age- and sex-specific RIs for CBC parameters across pediatric, adult, and geriatric ages using secondary data, evaluating patterns of changes in CBC parameters. Methods: The reference population comprised 804,623 health examinees (66,611 aged 3-17 years; 564,280 aged 18-59 years; 173,732 aged 60-99 years), and, we excluded 22,766 examinees after outlier testing. The CBC parameters (red blood cell [RBC], white blood cell [WBC], and platelet parameters) from 781,857 examinees were studied. We determined statistically significant partitions of age and sex, and calculated RIs according to the CLSI C28-A3 guidelines. Results: RBC parameters increased with age until adulthood and decreased with age in males, but increased before puberty and then decreased with age in females. WBC and platelet counts were the highest in early childhood and decreased with age. Sex differences in each age group were noted: WBC count was higher in males than in females during adulthood, but platelet count was higher in females than in males from puberty onwards (P <0.001). Neutrophil count was the lowest in early childhood and increased with age. Lymphocyte count decreased with age after peaking in early childhood. Eosinophil count was the highest in childhood and higher in males than in females. Monocyte count was higher in males than in females (P <0.001). Conclusions: We provide comprehensive age- and sex-specific RIs for CBC parameters, which show dynamic changes with both age and sex.

Keywords

Acknowledgement

Supported by : Korea Association of Health Promotion

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