Growth of cortical bone thickness and trabecular bone density in Japanese children
| Autor: | Mami Matsukawa, Isao Mano, Satomi Tomida, Ritei Uehara, Misako Masumura, Etsuko Ozaki, Koichi Iwasa, Isao Watanabe, Mizuho Maekawa, Yutaro Yoneda, Teruhide Koyama, Nagato Kuriyama, Shiori Umemura, Daisuke Matsui |
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| Rok vydání: | 2020 |
| Předmět: |
Male
Histology Bone density Adolescent Physiology Endocrinology Diabetes and Metabolism Body fat percentage Young Adult Japan Bone Density Cortical Bone Medicine Humans Young adult Child Exercise Bone growth business.industry Trabecular bone medicine.anatomical_structure Lifestyle factors Cancellous Bone Cortical bone Female business Body mass index |
| Zdroj: | Bone. 141 |
| ISSN: | 1873-2763 |
| Popis: | Background The acquisition of a high bone density at a young age is a strategy to prevent fractures/falls later in life. We therefore decided to investigate the increases in cortical thickness (CoTh) and trabecular bone density (TBD) of children. Methods Subjects comprised 1314 students (678 boys and 636 girls) aged between 12 and 18 years. Lifestyle factors were examined with a self-administered questionnaire (sleep times, exercise habits, and calcium intake). Bone growth was assessed based on CoTh and TBD using an ultrasonic bone densitometer. Height, weight, and body fat percentage were also measured. Results Increases in CoTh and TBD occurred earlier in girls than in boys. Calcium intake was not sufficient at any of the ages examined, and sleep times were shorter than those recommended by the National Sleep Foundation. Increases in CoTh and TBD occurred subsequent to increases in height. Although increases in CoTh were observed with age in both sexes, TBD increased in boys until the age of 17 years and in girls until the age of 15 years. At 18 years of age, the young adult mean value was greater than 100% for CoTh but lower than 100% for TBD. A multivariate analysis identified age, body mass index (BMI), and exercise as independent positive factors for CoTh, while body fat percentage was an independent negative factor. Age and BMI were independent positive factors for TBD in both sexes, whereas body fat percentage was a positive factor in boys only. Conclusions The study found that CoTH and TBD varied with age and differed in increase in boys and girls; related factors of bone increase could also be found. The results of this study may contribute to the acquisition of high bone density in children and adolescents. |
| Databáze: | OpenAIRE |
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