Despite the high absolute fracture risk in the older adult population, there is limited evidence-based literature, RCTs, and studies with fractures as an outcome in frail and older people (defined as aged >75 years for the purpose of this document). This group is at the highest risk of fracture, with hip fracture the most common fracture type.1,2
Few studies include patients aged >75 years and, if they do, the numbers are often small and they are infrequently analysed as subgroups. Most of the evidence is based on a systematic review.3 Reassuringly, a review of the published literature on the clinical efficacy and safety of specific osteoporosis treatments in reducing fracture risk in women aged ≥75 years confirms the benefit of treatment.4–15 A consensus statement has recommended there is sufficient evidence for pharmacological treatments for the prevention of osteoporotic fracture in residential aged care.16 (Refer to Sections 3.1, 3.2, 3.3, and 3.5 for evidence updates on bisphosphonates, denosumab, romosozumab, and teriparatide, respectively).
Denosumab is the only agent for which RCTs have been specifically designed and powered to demonstrate a benefit in the reduction of hip fracture risk in women aged >75 years.11–13,15 Risedronate has been demonstrated to be beneficial in a mixed cohort of patients aged between 70 and 100 years with osteoporosis, but not in those aged >80 years with risk factors only.5–7
For non-vertebral fracture, there is evidence for fracture risk reduction with zoledronic acid in those aged ≥75 years,10 and with risedronate in those aged 70–79 years.5 There are inadequate conclusive data for most other agents in terms of non-vertebral fracture risk reduction in older populations because this subgroup is not specifically reported.14,15
Antiresorptives and osteoanabolic agents (romosozumab and teriparatide) are considered effective for vertebral fracture risk reduction in older female populations.3–16
Studies of the osteoanabolic agent romosozumab (compared with placebo or active comparators) have included a large proportion (30–50%) of patients aged >75 years. Although there is evidence for benefit in the total cohort (age 55–90 years) in improving BMD,17–20 vertebral fracture risk,17,18 clinical fracture risk19,20 and non-vertebral fracture risk,19 the benefit in those specifically over 75 years was not reported. However, there is no reason to doubt its efficacy in older people.
A Cochrane review of data pooled from 14 studies (11,808 participants) conducted in residential care settings found moderate-quality evidence for a small reduction in hip fracture risk (RR 0.82; 95% CI: 0.67–1.00) for hip protectors.21 The absolute effect was 11 fewer people (95% CI: from fewer than 20 to 0) per 1000 having a hip fracture when provided with hip protectors. There was moderate-quality evidence when pooling data from five trials in the community (5614 participants) that showed little or no effect on hip fracture risk (RR 1.15; 95% CI: 0.84–1.58) with hip protectors.21