Fall-related injuries among the elderly , defined as individuals aged 65 and older, are both frequent and serious. Prospective studies of community-dwelling elderly have found that more than 30% of the elderly fall at least once per year, and the proportion rises steeply with age.1,2 Up to 10% of independent older adults who fall will sustain a serious injury,3 such as a femur fracture, which may reduce mobility, limit social interactions, decrease physical fitness, lower quality of life, and increase risk of early death.4 In 2013, 2.5 million nonfatal falls among older adults were treated in emergency departments, and more than 734,000 of patients were hospitalized. In addition, approximately 25,500 older adults died from unintentional fall-related injuries in the same year.5 Costs of care for fall-related injuries in the elderly can also be prohibitive; annual nonfatal and fatal costs in the US totaled $23.3 billion in 2008,6 while the direct medical costs of falls (adjusted for inflation) were $34 billion in 2013.
Prevention of falls among the elderly is an important goal worldwide. Currently, there is a strong body of literature examining strategies for preventing falls using strategies such as exercise and footwear modification. Several meta-analyses and systematic reviews have identified successful strategies for preventing falls , proven effective in randomized controlled trials (RCTs).7–9 The most successful prevention methods seem to be progressively challenging exercise training7–9 and risk screening with environmental modifications. One of the limitations that has been identified in this body of work is the lack of injury outcomes.10 While preventing falls certainly makes intuitive sense, if successful strategies do not affect the outcome of interest, perhaps better use could be made of limited resources for elderly health and wellness.
The Eastern Association for the Surgery of Trauma Injury Control and Violence Prevention Committee along with the Practice Management Guidelines Section produced a practice management guideline to assess the scientific evidence regarding fall-related injury prevention strategies for the elderly .
OBJECTIVES
The objective of this practice management guideline was to assess the scientific evidence regarding falls -related injury prevention strategies among the elderly (age 65 or older).
METHODS
We used the validated Grading of Recommendations Assessment, Development, and Evaluation (GRADE) methodology for this study.11,12 The GRADE methodology entails creating a predetermined question or set of questions that the literature must answer, in the patient population, intervention, comparators, outcome (PICO) format. The PICO questions were created using a modified Delphi method by the Eastern Association for the Surgery of Trauma Injury Control and Violence Prevention Committee along with the Practice Management Guideline Section.
For this guideline, six topical PICO questions were estimated by the authors as the most salient aspects of injury-related falls prevention.
PICO Questions
P: Age 65 and older
I: Clinical interventions to reduce fall-related injuries
C: Intervention compared with control group
O: Injury due to falls
PICO 1: Should bone mineral–enhancing agents be used to prevent fall-related injuries in the elderly ?
PICO 2: Should hip protectors be used to prevent fall-related injuries in the elderly ?
PICO 3: Should exercise programs be used to prevent fall-related injuries in the elderly ?
PICO 4: Should physical environment modifications be used to prevent fall-related injuries in the elderly ?
PICO 5: Should risk factor screening be used to prevent fall-related injuries in the elderly ?
PICO 6: Should multiple interventions tailored to the population or individual be used to prevent fall-related injuries in the elderly ?
After completing a comprehensive literature search performed by a university-affiliated research librarian, three independent reviewers screened the titles and abstracts, excluding reviews, case reports, articles in which injury was not an outcome measure, and unrelated articles. The resulting studies were used for the guideline.
Inclusion Criteria for this Guideline
Study Types
Studies included RCTs, prospective and retrospective observational studies, case-control studies, and meta-analyses. Case reports and reviews containing no original data or analyses were excluded. No date range was specified so as not to exclude early, salient studies.
Participant Types
We included all studies of falls -related injury prevention for participants aged 65 and older.
Intervention Types
We included all studies of falls -related injury prevention methods related to our PICO questions of interest. For PICO 6, we included studies of multiple simultaneous interventions, such as vitamin D plus strength training, tailored to the individual or to a population.
Outcome Measure Types
We limited the review to studies in which injury was the outcome, not simply falls . Owing to the heterogeneity of injury reports, all injuries including, but not limited to, fractures, contusions, lacerations, and hemorrhage were felt to be essential to evaluating the literature within the GRADE framework.
Data Sources and Search
References were identified by research librarians using the Cochrane Library, the MEDLINE database in the National Library of Medicine, and the National Institutes of Health via Entrez PubMed (www.pubmed.gov ) in November 2012 with a simple search in March 2015. The search was designed to identify English-language citations regarding fall-related injury prevention in the elderly . Our search strategy was defined a priori to evaluate only those articles in which injury was the outcome, not falls alone. Supplemental digital content 1 contains the MESH terms used for the initial search (see Supplemental Digital Content 1, https://links.lww.com/TA/A745 ). The articles were limited to humans, clinical trials, RCTs, practice guidelines, meta-analyses, and reviews. A total of 1,830 studies were initially identified.
Study Selection
Case reports and small case series were excluded (n = 128). The authors then reviewed the articles for relevance and excluded articles that did not include injury as a specific outcome of interest (n = 1478). Articles not relevant to our specific PICO interventions (n = 195) were also excluded. Additional articles were added to the literature summary after reading relevant review articles and meta-analyses (n = 20). The final list of 49 articles was reviewed and used to create the recommendations. Each author separately reviewed the evidence to support recommendations using the GRADE methodology in December 2012. Finally, we performed a focused search update in March 2015, during the review and manuscript preparation stages. One additional article was identified and included in the analysis at that time, for a final total of 50 articles reviewed.13–64 The study selection process is highlighted in the PRISMA flow diagram for Figure 1 .
Figure 1: PRISMA diagram .
Data Extraction and Management
All studies used for the review were entered into a Microsoft Excel (Redmond, WA) spreadsheet containing information on authors, article title, study methodology, and intervention and outcome measures. A master copy was provided to all reviewers.
Methodological Quality Assessment
We used the validated GRADE methodology for this study.11,12 Each designated reviewer independently evaluated the data in aggregate with respect to the quality of the evidence to adequately answer each PICO question and quantified the strength of any recommendations. Reviewers are asked to determine effect size, risk of bias, inconsistency, indirectness, precision, and publication bias.
Recommendations are based on the overall quality of the evidence. The GRADE methodology suggests the phrases, “we strongly recommend” for strong evidence, and “we conditionally recommend” for weaker evidence.
RESULTS
We identified 50 articles regarding fall-related injury prevention among the elderly , addressing our six main areas of interest: bone mineral–enhancing agents, hip protectors, exercise programs, physical environment modifications, risk screening strategies, and combined programs. Each evidence profile was evaluated separately as it related to our predetermined PICO question.
PICO 1: Should bone mineral–enhancing agents be used to prevent fall-related injuries in the elderly ? (Table 1 )
TABLE 1: Strength of Evidence for Bone Mineral–Enhancing Agents in the Prevention of Fall-Related Injuries in the Elderly
To answer the question of the effectiveness of bone mineral-enhancing agents and fall-related fractures, a meta-analysis was performed by Bischoff-Ferrari et al.13 in 2005. This review summarized the results of eight RCTs with fractures as a primary outcome;14–20,26 two of the studies were the same cohort but analyzed with and without an intention-to-treat analysis.14,26 The authors of the meta-analysis found a statistically significant difference in the treatment arm for all fractures and a trend to decreased hip fractures in the treatment arm. However, the daily dosages ranged from 400 IU cholecalciferol15,18 to 800 IU;14,17,19 another study administered 100,000 IU every 4 months.20 Calcium was either supplemented14,17,19 or assessed by food intake.15,16,18,20 The sensitivity analysis suggested that lower doses were not effective.15,18 Calcium was supplemented in all but one of the higher-dose trials, which makes its inclusion in a regimen unclear.
Subsequent to the meta-analysis, there have been four RCTs published on this topic.21–24 These trials used a variety of vitamin D administration methods (weekly, monthly, and annually) to achieve a dosing of at least 1,000 IU/day, and again, calcium was either supplemented or assessed. The outcomes of these trials were either not significant21,24 or favored treatment.22,23
PICO 2: Should hip protectors be used to prevent fall-related injuries in the elderly ? (Table 2 )
TABLE 2: Strength of Evidence for Hip Protectors in the Prevention of Fall-Related Injuries in the Elderly
Padded hip protectors have been used since the early 1990s to decrease the likelihood that a fall onto a hard surface will cause a fracture. These were extensively studied throughout the 1990s, and in 2004, a Cochrane Database Review of the evidence was published.27 Although most of the included studies did not show an effect despite having very large sample sizes,28,29,31,32,34–40 several studies among dependent elderly showed a marked effect.30,33,41 The conclusions of the authors were that hip protectors are a reasonable consideration for elderly living in nursing homes, with a 19% decrease in hip fracture rates. However, mixed results have been reported in three subsequent RCTs and reviews.40–42
PICO 3: Should exercise programs be used to prevent fall-related injuries in the elderly ? (Table 3 )
TABLE 3: Strength of Evidence for Exercise Programs in the Prevention of Fall-Related Injuries in the Elderly
In 2001, Robertson et al.43 published a meta-analysis of RCTs performed in New Zealand looking at exercise programs and injurious falls .44–46 The authors calculated a 35% reduction in both falls and fall-related injuries among older people using home exercise programs Two other, subsequent RCTs have looked at exercise programs, with one study finding a 10% reduction in falls and a decrease in fall-related injuries47 and the other finding no effect.48 Many of these studies are challenged by smaller sample sizes, heterogeneity of follow-up protocols, and self-reported injury outcome measures.
PICO 4: Should physical environment modifications be used to prevent fall-related injuries in the elderly ? (Table 4 )
TABLE 4: Strength of Evidence for Physical Environment Modifications in the Prevention of Fall-Related Injuries in the Elderly
It is certainly plausible that flooring and shoe choices, along with other physical environment modifications, may help decrease the risk of injurious falls . In a cluster-randomized pilot study, Drahota et al.49 examined flooring in particular and found that springier floors were half as likely to lead to fall-related injuries among hospitalized elderly , but the difference was not significant owing to small sample sizes. The rate of falls was equal in both groups. Investigators in Norway examined nearly 200,000 person-hours of community-dwelling elderly and found benefits to community-based programs designed to eliminate household environmental hazards, with substantial decreases in admissions for fall-related fractures.50 A much smaller study in the United States had not demonstrated a benefit, but noted that certain aspects, such as grab bars, warranted further study.51
Of note, for institution-dwelling elderly , several investigators have examined the effects of restraint use for individuals with dementia. While this is not exactly an environmental modification, it is worth noting that restraints do not seem to improve safety and may in fact be associated with more injuries.67,68
PICO 5: Should risk factor screening be used to prevent fall-related injuries in the elderly ? (Table 5 )
TABLE 5: Strength of Evidence for Risk Factor Screening in the Prevention of Fall-Related Injuries in the Elderly
Risk factor screening has been studied extensively by the Epidémiologie de l’ostéoporose investigators. In a series of articles beginning in 1996, the authors have identified various risk factors associated with hip fracture risk, such as neurologic and visual impairment,52 markers of bone resorption,53 and bone density.54 The authors have also described various algorithms combining clinical assessments and bone screening examinations to better assess at-risk elderly .55,56
PICO 6: Should interventions tailored to the population or individual be used to prevent fall-related injuries in the elderly ? (Table 6 )
TABLE 6: Strength of Evidence for the Use of Multiple Simultaneous Interventions in the Prevention of Fall-Related Injuries in the Elderly
Many groups have attempted to decrease fall-related injuries by using multiple strategies at a time. For example, investigators in Finland created a program that combined strength and balance training, medical review and referrals, medication review, nutrition counseling, and home hazard assessment and found a nearly 30% reduction in fall-related injuries.62 Combining these strategies has been commonly studied, with mixed results, although the larger studies seem to have more positive outcomes.59,61,62
DISCUSSION
In summary, fall-related injuries are a significant problem among the elderly ; more than 95% of hip fractures are caused by falls . Each year, there are more than 258,000 fall-induced hip fractures, and the rate for females is almost twice the rate for males.65 Hip fractures in particular are associated with increased mortality, even after adjusting for preexisting factors.69 It is for that reason we examined the literature regarding the effectiveness of fall-related injury prevention strategies.
There has been considerable interest in the use of bone mineral–enhancing agents for the prevention of osteoporotic fractures in the elderly . This makes intuitive sense, as bone mineral density can be improved with vitamin D and calcium supplementation;70 vitamin D in particular may also improve muscle strength and balance.71 However, one of the challenges in interpreting the literature is the wide variation in study population characteristics and dosing strategies. In addition, sex and racial homogeneity predominated, which may decrease generalizability. However, the bulk of the evidence favors higher-dose vitamin D supplementation, particularly in independent elderly .
Hip protectors seem to be modestly effective at secondary prevention of fall-related fractures. However, a key issue is compliance, which is generally poor for these devices,27,31,36,38,39,41,42,72–76 and the negligible treatment effect for community-dwelling elderly suggests that the number needed to treat would be excessive for that population.27
Strength and balance training are reasonable strategies for decreasing fall-related injuries. Exercise may decrease the likelihood of falling in the first place, and then, by improving general health and perhaps bone density, decrease the likelihood of having injury. Prospective RCTs support the use of exercise programs to decrease falls , but the data on decreasing fall-related injury are mixed, possibly partly attributable to the heterogeneity of study participants and smaller sample sizes.
Environmental hazard reduction has been studied, but with mixed results. Like many of these interventions, potential hazards are varied, and the ability to make modifications to the environment may also be imperfect.
Risk factor screening, while not directly an intervention, may be able to help identify higher-risk individuals for targeted strategies. For example, identifying people with visual impairment or balance deficits, limiting medications that may cause altered mentation or strength, and treating conditions such as nocturia, which may cause night falls , are all potential strategies to reduce fall-related injuries.
Finally, mixed strategies seem to help decrease fall-related injuries among the elderly , but the results are hampered by heterogeneity. In addition, the largest positive studies have been conducted in health care systems with universal access and a central payer. In alternative health care systems, or fee-for-service, cost-effectiveness of these comprehensive strategies would have to be assessed.
RECOMMENDATIONS
PICO 1: Should bone mineral–enhancing agents be used to prevent fall-related injuries in the elderly ? (Table 7 )
TABLE 7: EAST Evidence-Based Recommendations for the Prevention of Fall-Related Injuries in the Elderly
Recommendation: We conditionally recommend vitamin D and calcium supplementation for frail elderly individuals.
Although the data vary widely in study population and dosing strategy, it is safe to say that most studies favor a higher dose of vitamin D. Usual daily dosing ranging from 400 IU to 800 IU cholecalciferol, while another regimen involves 100,000 IU cholecalciferol every 4 months. Calcium dosing ranges from 1,000 to 1,500 mg/day. This has been shown to improve muscle strength and balance. Sex and racial homogeneity predominated in most of the studies, which may decrease generalizability.
PICO 2: Should hip protectors be used to prevent fall-related injuries in the elderly ?
Recommendation: We conditionally recommend hip protectors for frail elderly individuals in the appropriate environment.
It is a known fact that hip fractures cause substantial morbidity, disability, and mortality among the elderly . Evidence shows a modest decrease in hip fractures when worn properly. The major issue with hip protectors is compliance; especially with unattractive hip widening that accompanies usage of protective padding.
PICO 3: Should exercise programs be used to prevent fall-related injuries in the elderly ?
Recommendation: We conditionally recommend evidence-based exercise programs for frail elderly individuals.
The data vary in modesty regarding use of exercise programs in decreasing fall-related injuries, mostly due to small sample sizes. Nevertheless, most of the results depict reduction of injuries related to falls , when used in the appropriate setting.
PICO 4: Should physical environment modifications be used to prevent fall-related injuries in the elderly ?
Recommendation: We conditionally recommend physical environment modification for frail elderly people.
Owing to difficulty in making appropriate changes to the environmental factors that truly affect fall-related injuries, the data render mixed results in this arena; although grab bars, clutter removal, etc. seem to be of benefit.
PICO 5: Should risk factor screening be used to prevent fall-related injuries in the elderly ?
Recommendation: We conditionally recommend frailty screening for the elderly .
Although risk factor screening is not a direct intervention, it may be used as a mechanism of which higher-risk individuals can be targeted for appropriate risk-reduction interventions.
PICO 6: Should multiple interventions tailored to the population or individuals be used to prevent fall-related injuries in the elderly ?
Recommendation: We strongly recommend risk stratification with targeted, comprehensive risk-reduction strategies tailored to particular high-risk groups.
Although mixed strategies seem to assist in decreasing fall-related injuries among the elderly , the results are hampered by heterogeneity such as differing medication dosages, variable sample sizes, and participant adherence. The largest favorable studies have been conducted in health care systems with universal access and a central payer. In alternative health care systems (or fee-for-service-systems), cost-effectiveness of these comprehensive strategies would have to be assessed.
CONCLUSION
In summary, several strategies have been found to decrease the risk of fall-related injuries among the elderly ; but racial, socioeconomic, and population disparities have created a knowledge gap and may limit generalizability. This committee recommends further research to strengthen future evidence-based guidelines.
AUTHORSHIP
M.L.C. contributed to conceptualization, evidence grading, and manuscript preparation. T.D. and P.V. contributed to evidence grading and manuscript preparation. A.B.C., R.B., A.M., and W.G. participated in evidence grading and editorial support.
DISCLOSURE
The authors declare no conflicts of interest. They did not receive funding for this work.
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