TY - JOUR
T1 - Tracking of BMI in Japanese children from 6 to 18 years of age
T2 - Reference values for annual BMI incremental change and proposal for size of increment indicative of risk for obesity
AU - Inokuchi, Mikako
AU - Matsuo, Nobutake
AU - Takayama, John I.
AU - Hasegawa, Tomonobu
N1 - Funding Information:
We thank Professor Tim Cole for critical review of the manuscript and advice on statistical analysis. We also thank Professor Takao Takahashi for continued support. This research was supported by Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology.
PY - 2011/3
Y1 - 2011/3
N2 - Background: A large incremental increase in BMI indicates excess fat deposition in most children, but the reference values for identifying those at risk for developing obesity have not been defined.Aim: To determine the mean and SD of annual incremental change (ΔSDS) in BMI for Japanese school children. Subjects and methods: A cohort of 669 Japanese children in one private school in Tokyo in whom height and weight were measured annually between 6-17 years of age. Each child's BMI was converted to SDS as based on the 1978-1981 Japanese references for the 12 annual measurements to derive the correlation coefficient, r, between two successive measurements. Using the formula, SD of ΔSDS = √2(1-r), the mean and SD of ΔSDS were obtained. Results: Excess BMI gain was defined in terms of ΔSDS in Japanese children. Annual incremental increase greater than 2 SD of ΔSDS, equivalent to 1-2 BMI units/year for younger children and 2-3 BMI units/year for older children, respectively, indicates rapid increase in body fat in Japanese children. Conclusion: Based on analysis of incremental change in BMI in this cohort, a cut-off has been identified that can be used to identify children at risk for developing obesity.
AB - Background: A large incremental increase in BMI indicates excess fat deposition in most children, but the reference values for identifying those at risk for developing obesity have not been defined.Aim: To determine the mean and SD of annual incremental change (ΔSDS) in BMI for Japanese school children. Subjects and methods: A cohort of 669 Japanese children in one private school in Tokyo in whom height and weight were measured annually between 6-17 years of age. Each child's BMI was converted to SDS as based on the 1978-1981 Japanese references for the 12 annual measurements to derive the correlation coefficient, r, between two successive measurements. Using the formula, SD of ΔSDS = √2(1-r), the mean and SD of ΔSDS were obtained. Results: Excess BMI gain was defined in terms of ΔSDS in Japanese children. Annual incremental increase greater than 2 SD of ΔSDS, equivalent to 1-2 BMI units/year for younger children and 2-3 BMI units/year for older children, respectively, indicates rapid increase in body fat in Japanese children. Conclusion: Based on analysis of incremental change in BMI in this cohort, a cut-off has been identified that can be used to identify children at risk for developing obesity.
KW - BMI
KW - Longitudinal study
KW - Reference values
KW - ΔSDS
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U2 - 10.3109/03014460.2010.499883
DO - 10.3109/03014460.2010.499883
M3 - Article
C2 - 20632778
AN - SCOPUS:79551499834
SN - 0301-4460
VL - 38
SP - 146
EP - 149
JO - Annals of Human Biology
JF - Annals of Human Biology
IS - 2
ER -
