Prevalence of hypochromia (without microcytosis) vs microcytosis (without hypochromia) in iron deficiency

Area of Science:

• Geriatric Medicine
• Hematology
• Nutritional Science

Background:

• Iron deficiency is common in the elderly, and its diagnosis can be complicated by other nutritional deficiencies.
• Hypochromia (low mean corpuscular hemoglobin) and microcytosis (low mean corpuscular volume) are often used as indicators of iron deficiency anemia.

Purpose of the Study:

• To evaluate the diagnostic utility of hypochromia and microcytosis for identifying iron deficiency in geriatric patients.
• To investigate the prevalence of coexisting vitamin B12 deficiency in iron-deficient elderly individuals.

Main Methods:

• Analysis of red blood cell indices (MCH, MCV) and serum ferritin levels in 365 geriatric patients (aged 67-96 years).
• Comparison of the prevalence of iron deficiency based on different combinations of MCH and MCV values.
• Assessment of coexisting vitamin B12 deficiency in iron-deficient patients.

Main Results:

• 201 out of 365 patients were diagnosed with iron deficiency (serum ferritin ≤ 18 µg/l).
• A significant difference (P < 0.001) was observed in the proportion of iron-deficient patients with MCH < 26 pg and MCV ≥ 80 fl compared to those with MCV < 80 fl and MCH ≥ 26 pg.
• Fifteen percent of iron-deficient patients had coexisting vitamin B12 deficiency, with a similar prevalence (16%) in a subgroup with specific MCH/MCV profiles.

Conclusions:

• Hypochromia and microcytosis are valuable indicators for detecting iron deficiency in the elderly population.
• Coexisting vitamin B12 deficiency is relatively common in geriatric patients with iron deficiency and can influence red blood cell indices.
• Careful consideration of multiple nutritional factors is essential for accurate diagnosis of anemia in older adults.