[Analysis of hemoglobin level and anemia prevalence in students aged 7-14 years in China, 2014]

Objective: To analyze the level of hemoglobin level and the prevalence of anemia in students aged 7-14 years in China. Methods: According to the 2010 Chinese National Surveys on Students'Constitution and Health, 71 130 students who were aged 7, 9, 12 and 14 years and had received hemoglobin test were sampled as the subjects, WHO anemia diagnostic criteria was used to explore the hemoglobin level and the prevalence of anemia. Results: The mean concentrations of hemoglobin were (129.25±11.37) g/L, (131.04±11.08) g/L, (135.02±12.12) g/L and (138.47±13.97) g/L and the prevalence of anemia was 9.0%, 6.5%, 8.6% and 7.7% respectively in 7, 9, 12 and 14 years old students. The prevalence of anemia was 9.7% in girls, significant higher than that in boys (6.2%), and 8.8% in rural students, significantly higher than that in urban students (7.1%). The hemoglobin levels were (133.19±12.56) g/L, (133.28±12.76) g/L, (134.24±12.73) g/L and (133.79±12.16) g/L and the prevalence of anemia were 8.8%, 8.3%, 6.7% and 5.9% respectively in thin, normal, overweight and fat students, there were significant differences among four groups. Conclusion: The prevalence of anemia in students aged 7-14 years in China was still high, and there was significant differences among different gender, area, age and nutritional status groups.