Comprehensive geriatric assessment for identifying older people at risk of hip fracture: cross-sectional study with comparative group.

Background: Hip fracture (HF) is by far the most common serious fragility fracture. Its care is a major challenge to all healthcare systems.

Aim: To determine whether there are characteristics of older people identified via comprehensive geriatric assessment (CGA) that help identify those with an increased risk of HF.

Methods: The demographic, functional, cognitive and nutritional data of a cohort of patients admitted for acute HF were compared with those of a population cohort representing community-dwelling older people in the same urban district without HF. Bivariate analysis was performed on the variables in both the complete samples and in a subsample of age and sex paired subjects, followed by logistic regression analysis.

Results: A total of 509 HF patients and 1315 community-dwelling older people were included. The HF patients were older and more frequently women and had more frequent disability and cognitive impairment, lower handgrip strength, lower body mass index (BMI) and a higher frequency of vitamin D deficiency compared with the community controls (P < 0.001). The variables most strongly associated with the presence of HF in the multivariate analysis, aside from age and female sex, were BMI<22 kg/m2 [odds ratio (OR) = 5.11], disability (OR = 4.32), muscle weakness (OR = 3.01), and vitamin D deficiency (OR = 2.13).

Conclusions: There are easily obtained CGA determinants that are strongly associated with fragility HF. The detection of low weight, disability, malnutrition, muscle weakness, and vitamin D deficiency can help identify at-risk older people to implement prevention strategies.