Underweight young women without later weight gain are at high risk for osteopenia after midlife: The KOBE study

Yukako Tatsumi, Aya Higashiyama, Yoshimi Kubota, Daisuke Sugiyama, Yoko Nishida, Takumi Hirata, Aya Kadota, Kunihiro Nishimura, Hironori Imano, Naomi Miyamatsu, Yoshihiro Miyamoto, Tomonori Okamura

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


Background: Although underweight young women are targets for interventions to prevent low bone mineral density (BMD), the relationship between change in body mass index (BMI) from youth to older age and BMD has not been widely investigated in community dwellers. Methods: In 749 healthy Japanese women aged 40-74 years, BMD was measured by quantitative ultrasound and anthropometric measurements, and BMI was calculated from body weight and height. The BMI of participants at age 20 years was estimated by self-reported body weight and their present height. They were classified into four groups according to the presence of underweight (BMI <18.5 kg/m2) at 20 and/or at present. Logistic regression models were used to estimate multivariate-adjusted odds ratios (ORs) of the presence of underweight at 20 and/or at present for osteopenia (BMD T score <-1 standard deviations) compared with participants with BMI ≥18.5 kg/m2 both at 20 and at present. Results: The participants who were underweight both at 20 and at present had a higher OR for osteopenia compared with those with BMI ≥18.5 kg/m2 at 20 and at present (OR 3.94; 95% confidence interval [CI], 1.97-7.89). Those underweight only at present also had significantly increased OR of developing osteopenia (OR 2.95; 95% CI, 1.67-5.24). The OR of those underweight only at 20 was 0.87 (95% CI, 0.51-1.48). Conclusions: Current underweight was associated with increased risk for osteopenia among Japanese women, especially in those who were underweight both at 20 and at present. To prevent low BMD in the future, maintaining appropriate body weight might be effective for young underweight women.

Original languageEnglish
Pages (from-to)572-578
Number of pages7
JournalJournal of epidemiology
Issue number11
Publication statusPublished - 2016


  • Body mass index
  • Bone mineral density
  • Osteopenia
  • Underweight

ASJC Scopus subject areas

  • Epidemiology


Dive into the research topics of 'Underweight young women without later weight gain are at high risk for osteopenia after midlife: The KOBE study'. Together they form a unique fingerprint.

Cite this