Bone mineral density of infants and toddlers aged 0-3 years
Objective:To measure the bone mineral density of infants and toddlers aged 0-3 in Shijingshan district of Beijing.Methods:A total of 6297 infants and toddlers aged 0-3 years who received physical examination at Peking University Shougang Hospital from January 2015 to February 2020 were selected, of whom there were 3306 boys and 2991 girls. Bone mineral density was measured by quantitative ultrasound. The results were then analyzed statistically.Results:The mean Z value of bone mineral density in 6297 infants and toddlers was -0.99; the mild deficiency rate was 14.2% (911/6297), moderate deficiency rate was 11.6% (750/6297), severe deficiency rate was 19.9% (1268/6297), and the total deficiency rate was 46.5% (2929/6297). The bone mineral density of girls was significantly lower than that of boys. The deficiency rate of girls was 56.9% (1702/2991), which was significantly higher than that of boys (37.1%, 1227/3306). The mild deficiency, moderate deficiency and severe deficiency rates of girls were also all higher than those of boys. The bone mineral density was the lowest in the 4-6 months group, followed by 0-3 months. After 6 months of age, the bone mineral density increased gradually with age. The deficiency rate was the highest too in the 4-6 months group.Conclusion:There is a high rate of low bone mineral density in infants and toddlers aged 0-3 years in Shijingshan district of Beijing, which is related to gender and age.
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