TY - JOUR
T1 - BMI z-score is the optimal measure of annual adiposity change in elementary school children
AU - Inokuchi, Mikako
AU - Matsuo, Nobutake
AU - Takayama, John I.
AU - Hasegawa, Tomonobu
PY - 2011/11/1
Y1 - 2011/11/1
N2 - Background: BMI or BMI% adjusted for age has been identified as the optimal measure of short-term adiposity change in kindergarten children aged 29-68 months. The optimal measure of annual adiposity change in older age children, however, has not been determined. Aim: To identify the optimal measure of annual adiposity change for Japanese children aged 6-12 years. 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 and 12 years. Each child's annual variability in adiposity was summarized by the standard deviation (SD) of BMI and BMI% adjusted for age, BMI z-score and BMI centile. The SDs were compared in overweight and non-overweight children and correlated with each child's baseline BMI z-score. Results: The within-child BMI, BMI% and BMI centile SDs were significantly different in overweight and non-overweight children, while the BMI z-score SDs were similar in the two groups. Furthermore, the within-child BMI, BMI% and BMI centile SDs were inversely correlated with baseline BMI z-score, whereas BMI z-score SDs were not, with the exception of measurements for grade 1-2 children. Conclusion: The BMI z-score is the optimal measure of annual adiposity change for elementary school children.
AB - Background: BMI or BMI% adjusted for age has been identified as the optimal measure of short-term adiposity change in kindergarten children aged 29-68 months. The optimal measure of annual adiposity change in older age children, however, has not been determined. Aim: To identify the optimal measure of annual adiposity change for Japanese children aged 6-12 years. 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 and 12 years. Each child's annual variability in adiposity was summarized by the standard deviation (SD) of BMI and BMI% adjusted for age, BMI z-score and BMI centile. The SDs were compared in overweight and non-overweight children and correlated with each child's baseline BMI z-score. Results: The within-child BMI, BMI% and BMI centile SDs were significantly different in overweight and non-overweight children, while the BMI z-score SDs were similar in the two groups. Furthermore, the within-child BMI, BMI% and BMI centile SDs were inversely correlated with baseline BMI z-score, whereas BMI z-score SDs were not, with the exception of measurements for grade 1-2 children. Conclusion: The BMI z-score is the optimal measure of annual adiposity change for elementary school children.
KW - BMI
KW - Child obesity
KW - longitudinal study
KW - school-based study
UR - http://www.scopus.com/inward/record.url?scp=80054913423&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=80054913423&partnerID=8YFLogxK
U2 - 10.3109/03014460.2011.620625
DO - 10.3109/03014460.2011.620625
M3 - Article
C2 - 22014004
AN - SCOPUS:80054913423
VL - 38
SP - 747
EP - 751
JO - Annals of Human Biology
JF - Annals of Human Biology
SN - 0301-4460
IS - 6
ER -