ArticleBMC pregnancy and childbirth2021
Factors associated with birthweight decline in Japan (1980-2004).
Article in BMC pregnancy and childbirth, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.
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Who cites it
19 citing papers in PubMed, 1 synthesis or guideline pooled it, 37 citations in OpenAlex.
- The decline of child stunting in 122 countries: a systematic review of child growth studies since the 19th century.BMJ global health · 2026Pooled it
- Postnatal Rapid Weight Gain of Japanese Infants Based on the World Health Organization Child Growth Standards.Cureus · 2025Article
- Parental Socioeconomic, Demographic, and Neonatal Factors Influencing Infants' Low Birth Weight: A Cross-Sectional Study in Bangladesh.Health science reports · 2025Article
- New reference values for ultrasound fetal biometry in Japanese population and comparison with other studies.Scientific reports · 2025Article
- Current status of fertility rates and modes of delivery after restorative proctocolectomy with ileal pouch-anal anastomosis.International journal of colorectal disease · 2025Article
- Three-Dimensional Imaging Sensor-Based Non-Contact Measurement of Neonatal Head Circumference in Incubators.Sensors (Basel, Switzerland) · 2025Article
- Recent Status of Low-Birth-Weight Infants in Japan.Cureus · 2025Article
- Association Between Women's Birth Weight and Reproductive Characteristics in Adulthood: The JPHC-NEXT Study.Journal of epidemiology · 2025Article
- Unveiling the pathways: identifying the multifaceted determinants of low birth weight among neonates in low-income countries: a case-control study.BMJ public health · 2025Article
- Birthweight trends and their explanatory factors in Hungary between 1999 and 2018: an analysis of the Hungarian Tauffer registry.Reproductive health · 2024Article
- Health of singleton neonates in Switzerland through time and crises: a cross-sectional study at the population level, 2007-2022.BMC pregnancy and childbirth · 2024Article
- Sustained decline in birth weight and increased rate of preterm infants born small for gestational age in Japan.Frontiers in pediatrics · 2024Article
- Trends in Primary Tooth Emergence Pattern and Associated Factors in Japanese Infants.International dental journal · 2023Article
- Association of maternal nationality with preterm birth and low birth weight rates: analysis of nationwide data in Japan from 2016 to 2020.Maternal health, neonatology and perinatology · 2023Article
- Risk scores for predicting small for gestational age infants in Japan: The TMM birthree cohort study.Scientific reports · 2022Article
- Differences in Rates of Low Birth Weight among Prefectures in Japan: An Ecological Study Using Government Statistics Data.Children (Basel, Switzerland) · 2022Article
- Preschool-children's height, trend, and causes: Japanese national surveys 1990-2010.Clinical pediatric endocrinology : case reports and clinical investigations : official journal of the Japanese Society for Pediatric Endocrinology · 2022Article
- An Association between Maternal Occupations and Low Birth Weight Infants in Japan from 1995 to 2015.International journal of environmental research and public health · 2021Article
- Twenty-Year Trends of Low Birth Weight in Japan: A Joinpoint Regression Analysis of Data From 2000 to 2019.Frontiers in reproductive health · 2021Article
Corrections and comments
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Authors and funding
5 authors at 4 institutions in 1 country.
Funding
Abstract
backgroundBirthweight has been declining consistently for more than 30 years in Japan. This rapid rise in low birthweight is one of the worst among the countries of the Organization for Economic Co-operation and Development. We examined potential determinants of birthweight decline in Japan.
methodsWe used population-based birth certificate data from vital statistics records and retrieved 40,968,266 birth certificates of neonates born between 1980 and 2004. We analyzed time trends using linear regression analysis in examining whether the decline in birthweight could be explained by obstetrical variables such as gestational age and multiple gestations.
resultsFrom 1980 to 2004, we observed a decline in mean birthweight with a yearly effect of - 8.07 g, which became steeper after 1985, persisted until 1999, and plateaued thereafter. After adjusting for gestational age, gender, birth order, multiple gestations, and fathers' age, the yearly effect between 1980 and 2004 persisted at - 5.13 g.
conclusionRecent decreases in birthweight among Japanese neonates were not fully explained by trends in gestational age, gender, birth order, multiple gestations, and fathers' age. Thus, additional factors such as pre-pregnancy maternal body mass index (BMI) and maternal diet should be considered. Reducing the rate of induced deliveries and improving the BMI or diet of young women should be a public health priority.
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