This is a plain English summary of an original research article
Comprehensive geriatric assessment reduced the risk of delirium by 20% in patients having hip fracture surgery. Forty-three percent developed delirium on average compared with 53% who didn’t receive these assessments.
The assessment of the older persons’ medical condition was typically undertaken by a team of healthcare professionals who assessed functional ability, living circumstances and risk factors in order to develop a tailored plan for prevention and treatment of delirium after surgery.
This review identified four trials in people having surgery for hip fracture. Two assessed teams where geriatricians visited patients on orthopaedic wards. The other trials reported ward assessments where patients were already being looked after on an elderly care ward.
The ‘team’ assessments reduced the risk of delirium more than ‘ward’ assessments, though caution should be taken due to the small number of trials.
No trials came from the UK, but were from countries with similar populations and health systems. The results support current UK guidelines that recommend that all older people with hip fracture are assessed for delirium and receive multidisciplinary care from orthopaedic and geriatrician teams.
Why was this study needed?
Hip fracture is the most common form of serious injury in older adults and up to a third die within one year. Patients with hip fracture take up 1.5 million hospital bed days, with NHS and societal costs of £1 billion a year. This is equivalent to 1% of the entire NHS budget.
Delirium is a state of acute mental confusion. It’s the most common complication of hip fracture occurring in about 61% of this population and is associated with an increased risk of death.
Comprehensive geriatric assessment (CGA) is a process that assesses older people’s medical problems, mental health, functional ability and social circumstances with the aim of developing a tailored management plan.
A previous review of 20 studies has shown that CGA increases the chance of survival and of returning to independent life in a general population of older people admitted to hospital as an emergency.
The researchers wanted to find out how effective CGA is in preventing delirium after surgery for a hip fracture.
What did this study do?
This systematic review identified four randomised controlled trials including 973 patients who had hip fracture surgery with or without comprehensive geriatric assessment (CGA).
Two trials examined team-based CGA where geriatricians reviewed patients on orthopaedic wards, one with daily visits daily and the other on an “as needed” basis (reactive consultation). Two trials evaluated ward-based assessments on a geriatric ward. Studies varied in patient inclusion criteria, with most excluding fracture due to cancer.
All trials assessed delirium rates, and this was the main (primary) outcome for three of the four. In three studies doctors assessing delirium knew whether assessments had been performed which could have biased results in favour of a benefit in this group.
Trials were conducted in the US, Sweden, Norway and Spain, countries with similar health systems to the UK.
What did it find?
- Any type of assessment reduced the risk of delirium by 20% (relative risk [RR] 0.81, 95% confidence interval [CI] 0.69 to 0.94, four studies). Forty-three percent of patients who had an assessment developed delirium compared with 53% of those who didn’t.
- When analysed by assessment type, only those delivered by a visiting team reduced the risk of delirium. Delirium rates were 34% for ‘team’ assessments vs 43% without (RR 0.77, 95% CI 0.61 to 0.98). Fewer people who received ward assessments developed delirium (51%) than those without (60%) but this difference fell short of statistical significance (RR 0.83, 95% CI 0.64 to 1.08). However, there was considerable difference in the results of these two studies, so caution is needed when interpreting this result.
- No consistent effects of the assessments were observed for hospital length of stay (which varied from five to 38 days across studies), severity or duration of delirium, or in-hospital mortality.
What does current guidance say on this issue?
NICE guidelines (2011) recommend that to minimise the risk of delirium and maximise patient independence, healthcare professionals should actively look for cognitive impairment when patients first present with hip fracture. NICE recommend that all patients receive multidisciplinary management from admission, with an orthogeriatric or orthopaedic ward-based Hip Fracture Programme that identifies goals to help recover mobility and independence.
The British Geriatrics Society also recommends joint orthopaedic and geriatrician care for older people with fractures. The society doesn’t recommend reactive consultation by geriatricians, where patients are reviewed on an ‘ad hoc’ basis.
What are the implications?
This review supports messages from UK guidelines. These stress the comprehensive multidisciplinary approach that orthopaedic and elderly care teams provide for people with hip fracture.
There are some caveats, including the small number of trials, which varied in patient inclusions and methods (including the use of a reactive or ad-hoc consultation not recommended in the UK).
However, given previous findings that comprehensive geriatric assessment also improves survival and independence in a general population of older people, this suggests it has an important role in the care of hospitalised older patients.
Identifying risk factors for delirium in older patients with a hip fracture may require increased awareness, training and a project approach as exemplified by the service improvement initiative from Hertfordshire and Bedfordshire Critical Care Network.
Citation and Funding
Shields L, Henderson V, Caslake R. Comprehensive Geriatric Assessment for Prevention of Delirium After Hip Fracture: A Systematic Review of Randomized Controlled Trials. J Am Geriatr Soc. 2017;65(7):1559-165.
No funding information was provided for this study.
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