In a community health survey in rural Maharashtra, the most common cause of anemia in children aged 6 months to 5 years was identified. Which of the following is the most common cause of anemia in this age group in India?

Explanation

## Most Common Cause of Anemia in Children (6 Months–5 Years) in India **Key Point:** Iron deficiency anemia (IDA) is the most common cause of anemia in children aged 6 months to 5 years in India, accounting for 50–80% of all anemia cases in this age group. **High-Yield:** The causes of anemia vary dramatically by age group: - **Infants 0–6 months:** Physiologic anemia, hemolytic disease of newborn - **Children 6 months–5 years:** Iron deficiency anemia (most common) - **School-age children:** Iron deficiency, nutritional deficiencies, hemoglobinopathies - **Adolescents:** Iron deficiency (especially girls), nutritional deficiencies ### Why Iron Deficiency Is the Answer in This Age Group 1. **Depletion of fetal iron stores** — Maternal iron stores (acquired in utero) are depleted by 6 months of age. 2. **Inadequate dietary iron intake** — Complementary feeding often lacks iron-rich foods; cow's milk (low iron, inhibits absorption) is commonly used. 3. **Increased iron demand** — Rapid growth during this period increases iron requirements. 4. **Malabsorption** — Infections (diarrhea, parasites) impair iron absorption. 5. **Blood loss** — Cow's milk can cause occult GI bleeding in infants. ### Epidemiology in India | Age Group | Most Common Cause | Prevalence of IDA | |-----------|-------------------|-------------------| | 6 months–5 years | Iron deficiency | 50–80% | | 5–12 years | Iron deficiency | 30–50% | | Adolescent girls | Iron deficiency + menorrhagia | 40–60% | | Adult women (reproductive) | Menorrhagia | 50–60% | **Clinical Pearl:** The World Health Organization estimates that iron deficiency affects ~40% of children under 5 years in South Asia, making it the leading preventable cause of anemia in this region. ### Why Other Options Are Wrong **Vitamin B12 deficiency:** While vegetarianism is common in India, B12 deficiency is less common in young children (who often consume dairy/eggs) and typically presents later in childhood or adulthood. **Folate deficiency:** Although folate deficiency occurs in India, it is less common than iron deficiency in this age group and is often concurrent with iron deficiency rather than the primary cause. **Thalassemia trait:** While thalassemia is prevalent in certain regions of India (especially coastal areas), it is a genetic condition affecting a minority of the population, not the most common cause of anemia in the general pediatric population. [cite:Park 26e Ch 5; ICMR-DBT 2017 Nutritional Status Report]