Prevention of falls and fall-related injuries in community-dwelling seniors: an evidence-based analysis.
In early August 2007, the Medical Advisory Secretariat began work on the Aging in the Community project, an evidence-based review of the literature surrounding healthy aging in the community. The Health System Strategy Division at the Ministry of Health and Long-Term Care subsequently asked the secretariat to provide an evidentiary platform for the ministry's newly released Aging at Home Strategy.After a broad literature review and consultation with experts, the secretariat identified 4 key areas that strongly predict an elderly person's transition from independent community living to a long-term care home. Evidence-based analyses have been prepared for each of these 4 areas: falls and fall-related injuries, urinary incontinence, dementia, and social isolation. For the first area, falls and fall-related injuries, an economic model is described in a separate report.Please visit the Medical Advisory Secretariat Web site, http://www.health.gov.on.ca/english/providers/program/mas/mas_about.html, to review these titles within the Aging in the Community series.AGING IN THE COMMUNITY: Summary of Evidence-Based AnalysesPrevention of Falls and Fall-Related Injuries in Community-Dwelling Seniors: An Evidence-Based AnalysisBehavioural Interventions for Urinary Incontinence in Community-Dwelling Seniors: An Evidence-Based AnalysisCaregiver- and Patient-Directed Interventions for Dementia: An Evidence-Based AnalysisSocial Isolation in Community-Dwelling Seniors: An Evidence-Based AnalysisThe Falls/Fractures Economic Model in Ontario Residents Aged 65 Years and Over (FEMOR) OBJECTIVE: To identify interventions that may be effective in reducing the probability of an elderly person's falling and/or sustaining a fall-related injury.


BACKGROUND
Although estimates of fall rates vary widely based on the location, age, and living arrangements of the elderly population, it is estimated that each year approximately 30% of community-dwelling individuals aged 65 and older, and 50% of those aged 85 and older will fall. Of those individuals who fall, 12% to 42% will have a fall-related injury. Several meta-analyses and cohort studies have identified falls and fall-related injuries as a strong predictor of admission to a long-term care (LTC) home. It has been shown that the risk of LTC home admission is over 5 times higher in seniors who experienced 2 or more falls without injury, and over 10 times higher in seniors who experienced a fall causing serious injury. Falls result from the interaction of a variety of risk factors that can be both intrinsic and extrinsic. Intrinsic factors are those that pertain to the physical, demographic, and health status of the individual, while extrinsic factors relate to the physical and socio-economic environment. Intrinsic risk factors can be further grouped into psychosocial/demographic risks, medical risks, risks associated with activity level and dependence, and medication risks. Commonly described extrinsic risks are tripping hazards, balance and slip hazards, and vision hazards. NOTE: It is recognized that the terms "senior" and "elderly" carry a range of meanings for different audiences; this report generally uses the former, but the terms are treated here as essentially interchangeable.  EVIDENCE-BASED ANALYSIS OF EFFECTIVENESS:


OBJECTIVE
Since many risk factors for falls are modifiable, what interventions (devices, systems, programs) exist that reduce the risk of falls and/or fall-related injuries for community-dwelling seniors?


METHODS



METHODS
English language;published between January 2000 and September 2007;population of community-dwelling seniors (majority aged 65+); andrandomized controlled trials (RCTs), quasi-experimental trials, systematic reviews, or meta-analyses.


METHODS
special populations (e.g., stroke or osteoporosis; however, studies restricted only to women were included);studies only reporting surrogate outcomes; orstudies whose outcome cannot be extracted for meta-analysis.


METHODS
number of fallers, andnumber of falls resulting in injury/fracture.


METHODS
A search was performed in OVID MEDLINE, MEDLINE In-Process and Other Non-Indexed Citations, EMBASE, the Cumulative Index to Nursing & Allied Health Literature (CINAHL), The Cochrane Library, and the International Agency for Health Technology Assessment (INAHTA) for studies published between January 2000 and September 2007. Furthermore, all studies included in a 2003 Cochrane review were considered for inclusion in this analysis. Abstracts were reviewed by a single author, and studies meeting the inclusion criteria outlined above were obtained. Studies were grouped based on intervention type, and data on population characteristics, fall outcomes, and study design were extracted. Reference lists were also checked for relevant studies. The quality of the evidence was assessed as high, moderate, low, or very low according to the GRADE methodology.


RESULTS
The following 11 interventions were identified in the literature search: exercise programs, vision assessment and referral, cataract surgery, environmental modifications, vitamin D supplementation, vitamin D plus calcium supplementation, hormone replacement therapy (HRT), medication withdrawal, gait-stabilizing devices, hip protectors, and multifactorial interventions. Exercise programs were stratified into targeted programs where the exercise routine was tailored to the individuals' needs, and untargeted programs that were identical among subjects. Furthermore, analyses were stratified by exercise program duration (<6 months and ≥6 months) and fall risk of study participants. Similarly, the analyses on the environmental modification studies were stratified by risk. Low-risk study participants had had no fall in the year prior to study entry, while high-risk participants had had at least one fall in the previous year. A total of 17 studies investigating multifactorial interventions were identified in the literature search. Of these studies, 10 reported results for a high-risk population with previous falls, while 6 reported results for study participants representative of the general population. One study provided stratified results by fall risk, and therefore results from this study were included in each stratified analysis. Executive Summary Table 1:Summary of Meta-Analyses of Studies Investigating the Effectiveness of Interventions on the Risk of Falls in Community-Dwelling Seniors(*)InterventionRR [95% CI]GRADEExercise programs  1. Targeted programs        General population0.81 [0.67-0.98]Low      High-risk population0.93 [0.82-1.06]High      Short duration0.91 [0.73-1.13]High      Long duration0.89 [0.79-1.01]Moderate  2. Untargeted programs        General population0.78 [0.66-0.91]Moderate      High-risk population0.89 [0.72-1.10]Very low      Short duration0.85 [0.71-1.01]Low      Long duration0.76 [0.64-0.91]Moderate  3. Combined targeted vs. untargeted programs        General populationN/AN/A      High-risk population0.87 [0.57-1.34]Moderate      Short duration1.11 [0.73-1.70]High      Long duration0.73 [0.57-0.95]HighVision intervention      Assessment/referral1.12 [0.82-1.53]Moderate      Cataract surgery1.11 [0.92-1.35]ModerateEnvironmental modifications      Low-risk population1.03 [0.75-1.41]High      High-risk population0.66 [0.54-0.81]High      General population0.85 [0.75-0.97]HighDrugs/Nutritional supplements      Vitamin D (men and women)0.94 [0.77-1.14]High      Vitamin D (women only)0.55 [0.29-1.08]Moderate      Vitamin D and calcium (men and women)0.89 [0.74-1.07]Moderate      Vitamin D and calcium (women only)0.83 [0.73-0.95]Moderate      Hormone replacement therapy0.98 [0.80-1.20]Low      Medication withdrawal0.34 [0.16-0.74]†LowGait-stabilizing device0.43 [0.29-0.64]ModerateMultifactorial intervention      Geriatric screening (general population)0.87 [0.69-1.10]Very low      High-risk population0.86 [0.75-0.98]Low*CI refers to confidence interval; RR, relative risk.†Hazard ratio is reported, because RR was not available.Executive Summary Table 2:Summary of Meta-Analyses of Studies Investigating the Effectiveness of Interventions on the Risk of Fall-Related Injuries in Community-Dwelling Seniors*InterventionRR [95% CI]GRADEExercise programs      Targeted programs0.67 [0.51-0.89]Moderate    Untargeted programs0.57 [0.38-0.86]Low    Combined targeted vs untargeted programs0.31 [0.13-0.74]HighDrugs/nutritional supplements      Vitamin D plus calcium (women only)0.77 [0.49-1.21]ModerateGait-stabilizing device0.10 [0.01-0.74]ModerateHip protectors3.49 [0.68-17.97]†LowMultifactorial intervention      Geriatric screening (general population)0.90 [0.53-1.51]Low    High-risk population0.86 [0.66-1.11]Moderate*CI refers to confidence interval; RR, relative risk.†Odds ratio is reported, because RR was not available.


CONCLUSIONS
High-quality evidence indicates that long-term exercise programs in mobile seniors and environmental modifications in the homes of frail elderly persons will effectively reduce falls and possibly fall-related injuries in Ontario's elderly population.A combination of vitamin D and calcium supplementation in elderly women will help reduce the risk of falls by more than 40%.The use of outdoor gait-stabilizing devices for mobile seniors during the winter in Ontario may reduce falls and fall-related injuries; however, evidence is limited and more research is required in this area.While psychotropic medication withdrawal may be an effective method for reducing falls, evidence is limited and long-term compliance has been demonstrated to be difficult to achieve.Multifactorial interventions in high-risk populations may be effective; however, the effect is only marginally significant, and the quality of evidence is low.