ΔBMI SDS of all boys and girls in Fukushima Prefecture ΔBMI SDS of all boys and girls in Fukushima Prefecture. ◆: control group, ■: group I, ▲: group II, ×: group IV. *P value <0.016, **P value <0.01, ***P value <0.001. ΔBMI SDS of all boys and girls in Fukushima Prefecture. ◆: control group, ■: group I, ▲: group II, ×: group IV. *P value <0.016, **P value <0.01, ***P value <0.001. BMI, body mass index; ΔBMI SDS, BMI SDS between two consecutive health examinations; M, month health examination; SDS, SD score. Atsushi Ono et al. bmjpo 2018;2:e000229 © Article author(s) (or their employer(s) unless otherwise stated in the text of the article) 2017. All rights reserved. No commercial use is permitted unless otherwise expressly granted.