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Establishment of pediatric reference intervals for complete blood count parameters in capillary blood in Beijing

Reference intervals (RIs) are normal ranges of clinical indicators established from healthy subjects, and comparing test results with RIs is the first step for clinicians in differentiating between healthy and diseased subjects. Capillary blood is widely used in complete blood count (CBC) tests in children; however, capillary blood‐based RIs for the CBC parameters are still lacking for all pediatric populations. The aim of this study was to establish capillary blood‐based RIs for the CBC parameters in children aged 3 months to 18 years in Beijing.