Normal haematological values: sex difference in neutrophil count.

Area of Science:

• Hematology
• Clinical Pathology
• Human Physiology

Background:

• Establishing accurate normal blood count ranges is crucial for clinical diagnosis.
• Variations in neutrophil counts can be influenced by demographic and physiological factors.

Purpose of the Study:

• To determine normal blood count ranges for hospital staff.
• To investigate sex-based differences in neutrophil counts.
• To explore diurnal variations in neutrophil counts.

Main Methods:

• Blood counts were performed on 200 healthy staff members (100 male, 100 female).
• Neutrophil and monocyte counts were analyzed.
• Data were analyzed for differences based on sex and time of day (morning vs. afternoon).

Main Results:

• Neutrophil counts were significantly higher in females compared to males (average difference of 0.66 x 10-9/L).
• This difference was independent of oral contraceptive use.
• Neutrophil counts were higher in the afternoon than in the morning (average difference of 0.50 x 10-9/L).
• A correlation was observed between neutrophil and monocyte counts.

Conclusions:

• Normal neutrophil ranges differ between sexes, with higher counts in females.
• Diurnal variation in neutrophil counts is significant, with higher levels in the afternoon.
• The correlation between neutrophil and monocyte counts warrants further investigation.