2025-07-30 北海道大学
グレーの線は体重と体長・体高の日本の基準線。小さく生まれた子(出生体重2,499g以下のグループ)はキャッチアップ成長がみられ、大きく生まれた子(出生体重3,500g以上のグループ)はキャッチダウン成長がみられる。
<関連情報>
- https://www.hokudai.ac.jp/news/2025/07/post-2001.html
- https://www.hokudai.ac.jp/news/pdf/250730_pr2.pdf
- https://www.jstage.jst.go.jp/article/cpe/advpub/0/advpub_2024-0063/_article
Japanese growth charts stratified by birth weight in 500-gram increments: findings from the Japan environment and children’s study 出生体重別500gごとの成長曲線:エコチル調査の結果から
Takeshi Yamaguchi, Naomi Tamura, Hiroyoshi Iwata, Sachiko Itoh, Mariko Itoh, Maki Tojo, Keitaro Makino, Yasuaki Saijo, Akie Nakamura, Yoshiya Ito, Kazutoshi Cho, Akinori Moriichi, Yumi Kono, Taro Yamauchi, Reiko Kishi, Japan Environment and Children’s Study Group
Clinical Pediatric Endocrinology Advance online publication: July 12, 2025
DOI:https://doi.org/10.1297/cpe.2024-0063
Abstract
Growth charts are essential tools for monitoring the physical development of children. We analyzed data from a nationwide Japanese birth cohort of 98,987 participants to create eight growth charts stratified by birth weight in 500-gram increments. Infants with birth weight < 2,500 g showed significant improvements in height and weight standard deviation (SD) scores by 4 yr of age. Boys and girls weighing 500–999 g at birth had average length/height SD scores of –6.40 and –8.20, which improved to –1.26 and –1.17 by 4 yr of age, respectively. Conversely, infants with birth weight ≥ 3,500 g showed decreased height and weight SD scores by 4 yr of age. Boys and girls weighing ≥ 4,000 g had average length/height SD scores of 1.87 and 2.10 at birth, which decreased to 0.34 and 0.51 by 4 yr of age, respectively. These findings reveal distinct growth patterns for different birth weight categories, highlighting the impact of birth weight on early childhood growth trajectories. The growth charts developed here serve as a valuable tool for evaluating children born small or large. These charts enable a more accurate monitoring of children’s growth and can be useful in both clinical and public health settings.
