No obvious association exists between red blood cell distribution width and thyroid function

Area of Science:

• Endocrinology
• Hematology
• Population Health

Background:

• Red blood cell distribution width (RDW) is a measure of red blood cell size variability.
• Thyroid dysfunction is a common endocrine disorder.
• Understanding factors associated with thyroid dysfunction is crucial for public health.

Purpose of the Study:

• To investigate the impact of gender on the association between red blood cell distribution width (RDW) and thyroid function.
• To explore RDW as a potential indicator for thyroid dysfunction in the Chinese population.

Main Methods:

• Cross-sectional study involving 8424 males and 5198 females from the Chinese population.
• Analysis of red blood cell distribution width (RDW) and thyroid function parameters.
• Binary logistic regression models were used to assess the relationship between RDW and hypothyroidism, considering gender and other covariates.

Main Results:

• Red blood cell distribution width (RDW) was significantly lower in males than females.
• RDW showed an increasing trend with age in males and a decrease during menopause in females.
• RDW demonstrated a negative relationship with hypothyroidism in both genders as a single factor; however, this association weakened when adjusted for covariates, particularly in females.

Conclusions:

• Gender significantly influences the association between red blood cell distribution width (RDW) and thyroid function.
• Anisocytosis, indicated by RDW, may be a contributing factor to thyroid dysfunction.
• Further research is warranted to elucidate the mechanisms underlying the RDW-thyroid function relationship across genders.