Obesity

Reduced muscle strength (dynapenia) in women with obesity confers a greater risk of falls and fractures in the UK Biobank

Obesity (Silver Spring)Published Cross-sectional study

Authors' conclusion

Dynapenia further increases the increased risk of leg and ankle fractures in obesity and counteracts the protective effects of obesity on fracture risk at all other sites (wrist, arm, hip, spine, other bones).

Study context

Population
Women aged 60–82 years, UK Biobank
Participants
16,147 women
Exposure
Obesity and dynapenia vs normal weight and normal handgrip strength (HGS)
Outcome
Self-reported falls (previous 12 months), lower extremity fractures and all other fractures (previous 5 years)
Methodological detailsUK Biobank, multiple logistic regression
  • UK Biobank
  • Multiple logistic regression

Main finding

As reported in the abstract

Lower extremity fracture risk · previous 5 years
Each group vs normal weightOdds ratio (95% CI)
Obesityindependent of areal BMD
1.25(1.12–1.38)
Dynapeniaindependent of areal BMD; reported as associated with greater risk
0.87(0.77–0.98)

Observational data: associations, not effects.

Further findings

OutcomeOR (95% CI)
All other fracture sites · previous 5 yearsObesityvs Normal weightProtective0.77 (0.61–0.96)
All other fracture sites · previous 5 yearsObesity with low HGSvs Normal weightEquivalent fracture risk1.06 (0.82–1.38)

Falls · previous 12 months

Women who fell
3793/16,147

Fall-related fractures

Eligible women with fall-related fractures
1413/15,570 (9.1%)

Original publication

Reduced muscle strength (dynapenia) in women with obesity confers a greater risk of falls and fractures in the UK Biobank. Obesity (Silver Spring). Published 11 December 2022. doi:10.1002/oby.23609

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