Of 291 children, FOT was successfully obtained from 233 children (80.1%). Within test variability was 2-3% for Rrs and 9-15% for Xrs. Between-test repeatability showed mean difference between the 2 sets of all Rrs and Xrs was nearly zero. Using regression analysis, height and arm span were the significant predictors for Rrs6, Rrs8, Rrs10, Xrs6, and Xrs8 but R2 of regression equations for height was higher.