• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2005 Fiscal Year Final Research Report Summary

A five-year longitudinal study on the change of and the determinant of bone mass gain at lumbar spine and hip during adolescence : the prevention of fracture on adolescence and osteoporosis from adolescence

Research Project

Project/Area Number 16590501
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Public health/Health science
Research InstitutionKyoto University of Education

Principal Investigator

NAKA Hiroshi  Kyoto University of Education, Associate Professor, 教育学部, 助教授 (00217639)

Co-Investigator(Kenkyū-buntansha) IKI Masayuki  Kinki University School of Medicine, Department of Public Health, Professor, 医学部, 教授 (50184388)
Project Period (FY) 2004 – 2005
KeywordsBone mineral density / Lumbar spine / Hip / Japanese adolescents / Longitudinal Study / Peak bone mass / Prevention of fracture / Prevention of osteoporosis
Research Abstract

For 412 first-grade students at 3 junior high schools in Kyoto, we measured HMD by DXA at the lumbar spine (L2-L4) and total hip, height, weight, and grip strength at baseline. This cohort was followed for 4 years through surveys conducted every other year. We examined the same variables in 346 third-grade junior high school students (127 boys and 219 girls, follow-up rate=84.0%) and 205 second-grade high school students (79 boys and 126 girls, follow-up rate excepting those who cannot pursue by transfer=55.5%). Our research produced five results.
1.There was a significant increase in BMD at the lumbar spine and total hip from the first year of junior high school to the second year of high school in both genders, and the gender differences in the rate of change in BMD for both grade levels and sites were observed. Since the rates of change^<#1> in BMD from the baseline to the third-grade in junior high schools have a larger increase than those^<#2> from the third-grade in junior high sc … More hools to the second-grade in high schools, the junior high school period is very important for bone mass gain.
2.The more mature subjects had a higher BMD at spine and hip in both sexes. However, an inverse relationship was observed between the maturation stage and the annual change rates in BMD.
3.BMD at the spine and hip increased with weight in both sexes. Weight management is important for the acquisition of bone mass.
4.The boys and girls with more active sporting lifestyles in junior high or high school showed greater BMD at spine and hip. Sporting activity at junior high school age and high school age was the important determinant of bone development at the lumbar spine and total hip in peripubertal boys and girls.
5.Sufficient calcium intake for the junior high school and high school period was considered to influence the acquisition of bone density positively, although there was no significant relationship between BMD and calcium intake.
#1)lumbar spine : boys=10.4%/yr, girls=6.0%/yr ; total hip : boys=8.6%/yr, girls=5.3%/yr
#2)lumbar spine : boys=6.1%/yr, girls=2.8%/yr ; total hip : boys=3.5%/yr, girls=2.0%/yr Less

  • Research Products

    (2 results)

All 2005

All Journal Article (2 results)

  • [Journal Article] Effects of pubertal development, height, weight, and grip strength on the bone mineral density of the lumbar spine and hip in peripubertal Japanese children : Kyoto kids increase density in the skeleton study (Kyoto KIDS study)2005

    • Author(s)
      Hiroshi Naka
    • Journal Title

      Journal of Bone and Mineral Metabolism Vol.23,No.6

      Pages: 463-469

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Effects of pubertal development, height, weight, and grip strength on the bone mineral density of the lumbar spine and hip in peripubertal Japanese children : Kyoto kids increase density in the skeleton study (Kyoto KIDS study)2005

    • Author(s)
      Hiroshi Naka
    • Journal Title

      Journal of Bone and Mineral Metabolism 23

      Pages: 463-469

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2007-12-13  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi