As people get older, they may fall more often for a variety of reasons including problems with balance, poor vision, and dementia. Up to 30% may fall in a year. Although one in five falls may require medical attention, less than one in 10 results in a fracture.
This review looked at the healthcare literature to establish which fall prevention interventions are effective for older people living in the community, and included 159 randomised controlled trials with 79,193 participants.  
Group and home-based exercise programmes, usually containing some balance and strength training exercises, effectively reduced falls, as did Tai Chi. Overall, exercise programmes aimed at reducing falls appear to reduce fractures.
Multifactorial interventions assess an individual's risk of falling, and then carry out treatment or arrange referrals to reduce the identified risks. Overall, current evidence shows that this type of intervention reduces the number of falls in older people living in the community but not the number of people falling during follow-up. These are complex interventions, and their effectiveness may be dependent on factors yet to be determined.  
Interventions to improve home safety appear to be effective, especially in people at higher risk of falling and when carried out by occupational therapists. An anti-slip shoe device worn in icy conditions can also reduce falls.
Taking vitamin D supplements does not appear to reduce falls in most community-dwelling older people, but may do so in those who have lower vitamin D levels in the blood before treatment.  
Some medications increase the risk of falling. Three trials in this review failed to reduce the number of falls by reviewing and adjusting medications. A fourth trial involving family physicians and their patients in medication review was effective in reducing falls. Gradual withdrawal of a particular type of drug for improving sleep, reducing anxiety, and treating depression (psychotropic medication) has been shown to reduce falls.
Cataract surgery reduces falls in women having the operation on the first affected eye. Insertion of a pacemaker can reduce falls in people with frequent falls associated with carotid sinus hypersensitivity, a condition which causes sudden changes in heart rate and blood pressure.
In people with disabling foot pain, the addition of footwear assessment, customised insoles, and foot and ankle exercises to regular podiatry reduced the number of falls but not the number of people falling.
The evidence relating to the provision of educational materials alone for preventing falls is inconclusive.

Interventions for preventing falls in older people living in the community

Measuring lower body strength is critical in evaluating the functional performance of older adults. The purpose of this study was to assess the test-retest reliability and the criterion-related and construct validity of a 30-s chair stand as a measure of lower body strength in adults over the age of 60 years. Seventy-six community-dwelling older adults (M age = 70.5 years) volunteered to participate in the study, which involved performing two 30-s chair-stand tests and two maximum leg-press tests, each conducted on separate days 2-5 days apart. Test-retest intraclass correlations of .84 for men and .92 for women, utilizing one-way analysis of variance procedures appropriate for a single trial, together with a nonsignificant change in scores from Day 1 testing to Day 2, indicate that the 30-s chair stand has good stability reliability. A moderately high correlation between chair-stand performance and maximum weight-adjusted leg-press performance for both men and women (r = .78 and .71, respectively) supports the criterion-related validity of the chair stand as a measure of lower body strength. Construct (or discriminant) validity of the chair stand was demonstrated by the test's ability to detect differences between various age and physical activity level groups. As expected, chair-stand performance decreased significantly across age groups in decades--from the 60s to the 70s to the 80s (p < .01) and was significantly lower for low-active participants than for high-active participants (p < .0001). It was concluded that the 30-s chair stand provides a reasonably reliable and valid indicator of lower body strength in generally active, community-dwelling older adults.

A 30-s chair-stand test as a measure of lower body strength in community-residing older adults

Background 
Approximately 30% of people over 65 years of age living in the community fall each year.
Objectives
To assess the effects of interventions to reduce the incidence of falls in older people living in the community.
Search strategy
We searched the Cochrane Bone, Joint and Muscle Trauma Group Specialised Register, CENTRAL (The Cochrane Library 2008, Issue 2), MEDLINE, EMBASE, CINAHL, and Current Controlled Trials ( all to May 2008).
Selection criteria
Randomised trials of interventions to reduce falls in community-dwelling older people. Primary outcomes were rate of falls and risk of falling.
Data collection analysis
Two review authors independently assessed trial quality and extracted data. Data were pooled where appropriate.
Main results
We included 111 trials ( 55,303 participants). Multiple-component group exercise reduced rate of falls and risk of falling (rate ratio (RaR) 0.78, 95% CI 0.71 to 0.86; risk ratio (RR) 0.83, 95% CI 0.72 to 0.97), as did Tai Chi ( RaR 0.63, 95% CI 0.52 to 0.78; RR 0.65, 95% CI 0.51 to 0.82), and individually prescribed multiple-component home-based exercise ( RaR 0.66, 95% CI 0.53 to 0.82; RR 0.77, 95% CI 0.61 to 0.97).
Assessment and multifactorial intervention reduced rate of falls (RaR 0.75, 95% CI 0.65 to 0.86), but not risk of falling.
Overall, vitamin D did not reduce falls ( RaR 0.95, 95% CI 0.80 to 1.14; RR 0.96, 95% CI 0.92 to 1.01), but may do so in people with lower vitamin D levels.
Overall, home safety interventions did not reduce falls ( RaR 0.90, 95% CI 0.79 to 1.03); RR 0.89, 95% CI 0.80 to 1.00), but were effective in people with severe visual impairment, and in others at higher risk of falling. An anti- slip shoe device reduced rate of falls in icy conditions ( RaR 0.42, 95% CI 0.22 to 0.78).
Gradual withdrawal of psychotropic medication reduced rate of falls ( RaR 0.34, 95% CI 0.16 to 0.73), but not risk of falling. A prescribing modification programme for primary care physicians significantly reduced risk of falling ( RR 0.61, 95% CI 0.41 to 0.91).
Pacemakers reduced rate of falls in people with carotid sinus hypersensitivity ( RaR 0.42, 95% CI 0.23 to 0.75). First eye cataract surgery reduced rate of falls ( RaR 0.66, 95% CI 0.45 to 0.95).
There is some evidence that falls prevention strategies can be cost saving.
Authors' conclusions
Exercise interventions reduce risk and rate of falls. Research is needed to confirm the contexts in which multifactorial assessment and intervention, home safety interventions, vitamin D supplementation, and other interventions are effective.

Interventions for preventing falls in older people living in the community (Review)

BACKGROUND: Approximately 30 per cent of people over 65 years of age and living in the community fall each year; the number is higher in institutions Although less than one fall in 10 results in a fracture, a fifth of fall incidents require medical attention OBJECTIVES: To assess the effects of interventions designed to reduce the incidence of falls in elderly people (living in the community, or in institutional or hospital care) SEARCH STRATEGY: We searched the Cochrane Bone, Joint and Muscle Trauma Group Specialised Register (January 2003), Cochrane Central Register of Controlled Trials (The Cochrane Library, Issue 1, 2003), MEDLINE (1966 to February 2003), EMBASE (1988 to 2003 Week 19), CINAHL (1982 to April 2003), The National Research Register, Issue 2, 2003, Current Controlled Trials (wwwcontrolled-trialscom accessed 11 July 2003) and reference lists of articles No language restrictions were applied Further trials were identified by contact with researchers in the field SELECTION CRITERIA: Randomised trials of interventions designed to minimise the effect of, or exposure to, risk factors for falling in elderly people Main outcomes of interest were the number of fallers, or falls Trials reporting only intermediate outcomes were excluded DATA COLLECTION AND ANALYSIS: Two reviewers independently assessed trial quality and extracted data Data were pooled using the fixed effect model where appropriate MAIN RESULTS: Sixty two trials involving 21,668 people were includedInterventions likely to be beneficial:Multidisciplinary, multifactorial, health/environmental risk factor screening/intervention programmes in the community both for an unselected population of older people (4 trials, 1651 participants, pooled RR 073, 95%CI 063 to 085), and for older people with a history of falling or selected because of known risk factors (5 trials, 1176 participants, pooled RR 086, 95%CI 076 to 098), and in residential care facilities (1 trial, 439 participants, cluster-adjusted incidence rate ratio 060, 95%CI 050 to 073) A programme of muscle strengthening and balance retraining, individually prescribed at home by a trained health professional (3 trials, 566 participants, pooled relative risk (RR) 080, 95% confidence interval (95%CI) 066 to 098) Home hazard assessment and modification that is professionally prescribed for older people with a history of falling (3 trials, 374 participants, RR 066, 95% CI 054 to 081) Withdrawal of psychotropic medication (1 trial, 93 participants, relative hazard 034, 95%CI 016 to 074) Cardiac pacing for fallers with cardioinhibitory carotid sinus hypersensitivity (1 trial, 175 participants, WMD -520, 95%CI -940 to -100) A 15 week Tai Chi group exercise intervention (1 trial, 200 participants, risk ratio 051, 95%CI 036 to 073) Interventions of unknown effectiveness:Group-delivered exercise interventions (9 trials, 1387 participants) Individual lower limb strength training (1 trial, 222 participants) Nutritional supplementation (1 trial, 46 participants) Vitamin D supplementation, with or without calcium (3 trials, 461 participants) Home hazard modification in association with advice on optimising medication (1 trial, 658 participants), or in association with an education package on exercise and reducing fall risk (1 trial, 3182 participants) Pharmacological therapy (raubasine-dihydroergocristine, 1 trial, 95 participants) Interventions using a cognitive/behavioural approach alone (2 trials, 145 participants) Home hazard modification for older people without a history of falling (1 trial, 530 participants) Hormone replacement therapy (1 trial, 116 participants) Correction of visual deficiency (1 trial, 276 participants)Interventions unlikely to be beneficial:Brisk walking in women with an upper limb fracture in the previous two years (1 trial, 165 participants) AUTHORS' CONCLUSIONS: Interventions to prevent falls that are likely to be effective are now available; less is known about their effectiveness in preventing fall-related injuries Costs per fall prevented have been established for four of the interventions and careful economic modelling in the context of the local healthcare system is important Some potential interventions are of unknown effectiveness and further research is indicated Language: en

Interventions for preventing falls in elderly people

Objective To assess the relative effectiveness of interventions to prevent falls in older adults to either a usual care group or control group.

Design Systematic review and meta-analyses.

Data sources Medline, HealthSTAR, Embase, the Cochrane Library, other health related databases, and the reference lists from review articles and systematic reviews.

Data extraction Components of falls intervention: multifactorial falls risk assessment with management programme, exercise, environmental modifications, or education.

Results 40 trials were identified. A random effects analysis combining trials with risk ratio data showed a reduction in the risk of falling (risk ratio 0.88, 95% confidence interval 0.82 to 0.95), whereas combining trials with incidence rate data showed a reduction in the monthly rate of falling (incidence rate ratio 0.80, 0.72 to 0.88). The effect of individual components was assessed by meta-regression. A multifactorial falls risk assessment and management programme was the most effective component on risk of falling (0.82, 0.72 to 0.94, number needed to treat 11) and monthly fall rate (0.63, 0.49 to 0.83; 11.8 fewer falls in treatment group per 100 patients per month). Exercise interventions also had a beneficial effect on the risk of falling (0.86, 0.75 to 0.99, number needed to treat 16) and monthly fall rate (0.86, 0.73 to 1.01; 2.7).

Conclusions Interventions to prevent falls in older adults are effective in reducing both the risk of falling and the monthly rate of falling. The most effective intervention was a multifactorial falls risk assessment and management programme. Exercise programmes were also effective in reducing the risk of falling.

https://www.bmj.com/content/bmj/328/7441/680.full.pdf

Interventions for the prevention of falls in older adults: systematic review and meta-analysis of randomised clinical trials

We studied the effects of lower extremity strength as well as gait and balance on the occurrence of falls in nursing home residents. Nursing home residents with a history of falls had less than half of the knee and ankle strength of nonfalling subjects residing in the same home. The differences were more prominent at the ankle than the knee, and were most pronounced in the ankle dorsiflexors, where they were one-tenth that of controls. Also of note was the fact that this same group of fallers had slowed gait velocity (58% of control) as well as an impaired response to postural perturbation as determined on the Postural Stress Test (55% of control). In a recently completed study we measured strength as balance (EquiTest balance platform) of community-dwelling subjects. The occurrence of loss of balance during the sensory organization test was correlated with diminished lower extremity (Pearson R = -.36, p = .001) as well as ankle dorsi and plantar flexion moments (Pearson R = -.37, p = .001). Using a logistic regression model, we demonstrated an independent effect of strength on the odds ratio of an SOT-LOB; for each newtonmeter per kg increase in strength there was a 20% decrease (95% CI, .74-87) in the odds ratio. The data from both nursing home and community-dwelling subjects indicate a strong relationship of lower extremity strength to balance and gait. The nursing home studies demonstrated an association between these functions and the occurrence of falls.(ABSTRACT TRUNCATED AT 250 WORDS)

Strength is a major factor in balance, gait, and the occurrence of falls

Short-term exposure to altered sensory input or destabilizing platform movement results in significant improvement in sway control and inhibition of inappropriate motor responses, resulting in improved balance during repetitive testing. In addition, there is recent evidence that strength and function can be increased in both active and frail elderly who participate in strength training programs. Therefore, the hypotheses to be tested are that (1) balance training alone, or (2) strength training alone will each be capable of significantly improving balance, gait, and functional mobility, and that (3) a combined program of balance and strength training will be more effective than either approach alone. These hypotheses will be tested relative to a control group, using a 2 x 2 design (30 subjects per group), in a community-dwelling elderly at least 75 years of age. Intervention sessions of at least 45 minutes will occur three times per week for 3 months, with 6 months of follow-up, home-based Tai Chi training. The primary outcome variable is a basic measure of functional balance, ie, the occurrence of loss of balance during tilts of the support and/or movement of the visual surround. Language: en

Training Balance and Strength in the Elderly to Improve Function

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Strength is a major factor in balance, gait, and the occurrence of falls

Training Balance and Strength in the Elderly to Improve Function