Hemoglobin and MCV values in 4,074 healthy black children and adolescents

Area of Science:

• Hematology
• Pediatric Health
• Public Health

Background:

• Lower hemoglobin and mean corpuscular volume (MCV) values have been observed in Black children compared to White children.
• Establishing accurate reference ranges is crucial for diagnosing anemia and other hematologic conditions.

Purpose of the Study:

• To establish normative hematologic reference ranges for a large cohort of healthy Black children and adolescents in the United States.
• To provide age- and sex-adjusted percentile values for blood hemoglobin concentration and red cell MCV.

Main Methods:

• A hematologic survey was conducted on 4,074 healthy Black boys and girls aged 1-20 years living near sea level.
• Blood hemoglobin concentration and red cell MCV were measured.
• Exclusion criteria included sickle cell disease and elevated hemoglobin F; however, carriers of hemoglobin S, hemoglobin C, thalassemia, and iron deficiency were included.

Main Results:

• The study reports the 3rd and 97th percentile values for hemoglobin and MCV, adjusted for age and sex.
• These percentiles are close to the 95% confidence limits, providing a robust statistical range.
• This represents the largest hematologic survey of healthy Black American children and adolescents to date.

Conclusions:

• The findings provide essential, large-scale reference data for hemoglobin and MCV in Black American pediatric and adolescent populations.
• These data can aid clinicians in the accurate interpretation of hematologic test results for this demographic.
• Further research may explore the clinical implications of these established reference ranges.