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'Neutropenia' in black west Indians
A V Zezulka1, J S Gill, D G Beevers
1University Department of Medicine, Dudley Road Hospital, Birmingham, UK.
Postgraduate Medical Journal
|April 1, 1987
Summary
Black individuals exhibit lower white blood cell counts, primarily due to reduced neutrophils, compared to White individuals. This difference in white blood cell count is clinically significant and requires awareness for accurate interpretation of routine blood tests.
Area of Science:
- Hematology
- Clinical Pathology
- Racial Health Disparities
Background:
- Routine hematological parameters can exhibit variations across different racial groups.
- Understanding these variations is crucial for accurate clinical interpretation and avoiding misdiagnosis.
Purpose of the Study:
- To investigate and compare routine hematological parameters between healthy Black and White subjects.
- To identify significant racial differences in blood cell counts and their clinical implications.
Main Methods:
- A prospective case-control study involving 294 healthy, age/sex-matched Black and White participants.
- Analysis of routine hematological parameters, including white cell count, neutrophil count, hemoglobin, and erythrocyte mean cell volume.
Main Results:
- Black individuals showed significantly lower total white cell counts, mainly due to reduced neutrophils, compared to White individuals.
- Lower hemoglobin concentration, erythrocyte mean cell volume, and monocyte counts were observed in Black subjects, while lymphocyte counts were higher.
- These racial differences persisted regardless of smoking, drinking habits, sickle cell trait, or oral contraceptive use.
Conclusions:
- Awareness of racial differences in hematological parameters, particularly white cell and neutrophil counts, is essential for clinicians.
- Recognizing these variations can prevent unnecessary investigations and misinterpretation of results in Black individuals, such as false positives for neutropenia.