Hubungan Kadar Hemoglobin dengan Nilai IMT (Indeks Massa Tubuh) pada Remaja Putri di SMA N 3 Boyolali

Background: Adolescence is a transitional period from childhood to adulthood, with signs of entering adolescence including physical and psychological changes. The adolescent phase is marked by physiological maturation such as the growth of tissues and body organs. This requires adolescents to have sufficient nutritional intake. If the intake is inadequate, it can lead to disturbances in the body's metabolic processes. Nutrient deficiencies, particularly iron (Fe), can cause nutritional anemia. Low hemoglobin levels can occur due to insufficient nutrient intake from food, especially nutrients that support hemoglobin formation. Objective: The objective of this study is to determine the relationship between hemoglobin levels and BMI scores in female adolescents at SMA N 3 Boyolali. Method: The research design was correlational analytic, with a sample of 76 female students at SMA Negeri 3 Boyolali. The sampling technique used random sampling according to inclusion and exclusion criteria. The research instruments included a digital hemoglobinometer, a digital step-on scale, and a microtoa. Data were analyzed using the Spearman Rank test. Results: Bivariate analysis using the Spearman Rank statistical test showed r = 0.343 with a p-value of 0.002 < 0.05, indicating that Ha was accepted. An r of 0.343 is equivalent to 34.3%, indicating a low strength of association. Conclusion: There is a significant relationship between hemoglobin levels and BMI scores in adolescent girls.