Osteoporosis, bone & mineral

Joint association of milk intake and blood 25(OH)D levels with fracture risk in postmenopausal women: 20-year follow-up data from the Japanese Population-Based Osteoporosis cohort study

Osteoporos IntPublished Secondary analysis of a prospective cohort study

Authors' conclusion

A clear positive association was identified between milk intake frequency and fracture risk among Japanese women after menopause with low 25(OH)D levels.

Study context

Population
Postmenopausal Japanese women aged ≥ 50 years, Japanese Population-Based Osteoporosis cohort
Participants
1,209 women17,427 person-years
Comparison
Milk intake <1 glass/day vs ≥1 glass/day, by blood 25D level
Primary endpoint
Clinical and osteoporotic fractures
Methodological detailspopulation-based, 20-year follow-up, Cox proportional hazard analyses
  • Population-based
  • 20-year follow-up
  • Cox proportional hazard analyses

Primary result

As reported in the abstract

Clinical fracture, 25(OH)D <15 ng/mL (subgroup)
Milk <1 glass/day vs Milk ≥1 glass/dayAdjusted hazard ratio (95% CI)
Clinical fracture, 25(OH)D <15 ng/mL (subgroup)
1.99(1.32–2.99)
Osteoporotic fracture
2.11(1.28–3.47)

Further findings

Fracture events over follow-up · median 16.1 years

Women with at least one clinical fracture
358
Women with at least one osteoporotic fracture
238
Milk intake < 1 glass/day
31.9%
25(OH)D < 15 ng/mL
21.6%

Univariate Cox analyses

25(OH)D <15 ng/mL and milk intake <1 glass/day each associated with increased risk of clinical and osteoporotic fractures

Original publication

Joint association of milk intake and blood 25(OH)D levels with fracture risk in postmenopausal women: 20-year follow-up data from the Japanese Population-Based Osteoporosis cohort study. Osteoporos Int. Published 23 June 2025. doi:10.1007/s00198-025-07577-z

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