Background: Anemia is a health problem that is prone to occur in adolescent. The risk of adolescent anemia is influenced by factors, including education, knowledge about anemia, and compliance with Fe tablet consumption. Non-compliance in consuming Fe tablets can be caused by various factors, such as bad taste, nausea side effects, and lack of understanding of the correct dosage and consumption method. Purpose: This is study aims to determine the correlation between the level of knowledge about anemia and adherence to taking Fe tablets with the incidence of anemia of adolescent at Bina Dirgantara Surakarta. Methods: Quantitative research design with descriptive correlation method and cross-sectional approach. The study population was all students of class X and XI of Bina Dirgantara Surakarta, the sampling technique used total sampling, obtained a sample of 50 respondents. The research instruments were questionnaires and GCHB. Results: The results showed that most respondents were in the high knowledge category, as many as 29 people (58%). Most respondents were categorized as non-compliant in consuming Fe tablets as many as 29 people (58%). Most respondents experienced anemia as many as 26 people (52%). There is no correlation between knowledge level and the incidence of anemia in adolescent (p-value = 0.077; p> 0.05). There was no correlation of adherence to taking Fe tablets with the incidence of anemia in adolescent (p-value = 0.077; p > 0.05). Conclusion: It was concluded that knowledge and adherence to taking Fe tablets were not correlation with the incidence of anemia in adolescent.
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