The incidence of fall injury events among the elderly in a defined population

The Mediterranean Osteoporosis Study (MEDOS): theoretical and practical issues of a major international project on hip fracture epidemiology

The Mediterranean Osteoporosis Study (MEDOS), a multicentre study on incidence, risk factors, and means of prevention of hip fracture in the Mediterranean region, started in 1986 and involved 14 centres, in Portugal, Spain, France, Italy, Greece, and Turkey. The project comprised three parts: a) a collection of existing register data on hip fracture occurrence from the 31 European ministries of health; b) a study of hip fracture incidence in the defined areas of the participating centres in the Mediterranean countries in age groups above 50 years; c) a case-control study comparing 8,185 individuals (2,816 cases and 5,369 controls; two controls per case). The structure of the project and its development is described. Methodological issues involving questions of reliability and validity are discussed. A number of measures were taken in order to obtain a high quality study, e.g., retranslations of the questionnaire of the case-control study, a separate reliability study of the interviewers' performance and uniformity, and a systematic tracing and estimation of the impact of errors in the data processing procedure. The complexity of the management process and the importance of effective communication on methodological issues are underlined.

Identification of fractures from computerized Medicare files

Study of non-hip fractures, which are a serious public health problem for persons greater than or equal to 65 years of age, has been hindered by the absence of an economical method for case identification. We assessed the utility of computerized Medicare inpatient, emergency room, hospital outpatient department and physician claims for identifying fractures in an elderly Tennessee Medicaid population. We used these files for 1987 to identify 3086 possible fractures and reviewed medical records for a sample of 1440. Using this sample, we developed a definition of probable fractures that excluded claims unlikely to represent newly diagnosed fractures. For all fractures, this definition had a positive predictive value of 94%, which for individual fracture sites, ranged from 79% (tibia/fibula) to 98% (hip). Of fractures in the reviewed sample, 91% were identified as probable fractures; this upper bound for sensitivity varied between 75% (femoral shaft) and 100% (patella). These data suggest that computerized Medicare files can be used for rapid and economical fracture ascertainment among persons greater than or equal to 65 years of age. However, further work is needed to obtain better estimates of sensitivity.

The impact of falls in an inner-city elderly African-American population

OBJECTIVE

To describe the impact of falls in an elderly African-American urban community and to identify predictors of poor recovery from falls.

DESIGN

Prospective cohort study.

SETTING

Emergency departments of 11 hospitals in western Philadelphia.

SUBJECTS

Interviews were conducted with 197 African-American persons 65 years and older residing in West Philadelphia who were treated at an emergency department because of a fall. Second interviews were conducted a median of 7 months after the fall with a sample of 70 patients who had not recovered at the time of the first interview.

MAIN OUTCOME MEASURES

Information abstracted from emergency department medical records and information on recovery obtained from two subsequent interviews.

RESULTS

A median of 8 weeks after the fall occurred, 43% of persons reported continued pain or restriction in their usual activities as a result of the fall. Predictors of poor recovery included the presence of grandchildren in the household, hearing impairment, severity of the injury, and injury to the lower extremities. Having someone present at the time of the fall was associated with a lower risk of poor recovery. Forty-one percent of the 70 persons interviewed a second time reported continued pain or restriction in usual activities a median of 7 months after the fall occurred. However, only 7% and 39% had received the services of a home health aide or physical therapist, respectively, and only 14% reported that a physician or other health professional had been particularly helpful since the fall had occurred.

CONCLUSIONS

A large proportion of elderly African-American persons treated at emergency departments for falls experience continued pain and restriction of activities after the fall. Many individuals have not recovered 7 months or longer after the fall and few persons report that a physician or other health professional has been particularly helpful since the fall occurred. We suggest that follow-up programs be developed for elderly persons in minority communities who come to emergency departments after a fall.

Geriatric patient emergency visits. Part I: Comparison of visits by geriatric and younger patients

OBJECTIVES

To describe emergency department use by the elderly, to define problems associated with emergency care of the elderly, and to compare these results with those for younger adult patients.

DESIGN

Retrospective, controlled chart review.

SETTING

Six geographically distinct US hospital EDs.

PARTICIPANTS

From each site, a stratified sample (approximately 7:3) of elderly (65 years or older) and nonelderly (21 to 64 years old) control patients treated during the same time period was used.

METHODS

Standardized review of ED records and billing charges. Comparisons of elderly and control patient groups using chi 2 analysis and Mann-Whitney U test (alpha = 0.05).

RESULTS

Four hundred eighteen elderly patients and 175 nonelderly controls were entered into the study. The elderly were more likely to arrive by ambulance (35% versus 11%; P less than .00001). More elderly than controls presented with conditions of either high or intermediate urgency (78% versus 61%; P less than .0003). The elderly more frequently presented with comorbid diseases (94% versus 63%; P less than .00001). Other findings for the elderly included a longer mean stay in the ED (185 versus 155 minutes; P less than .003), higher laboratory (78% versus 53%; P less than .00001) and radiology (77% versus 52%; P less than .00001) test rates, higher mean overall care charges ($471 versus $344; P less than .00001), and an admission rate (47% versus 19%; P less than .00001) twice that of younger adults.

CONCLUSION

Resource use and charges associated with emergency care are higher for the elderly than for younger patients. Increases in emergency resources and personnel or improvement in efficiency will be needed to maintain emergency care at present levels as the US population continues to grow and age.

The cost and frequency of hospitalization for fall-related injuries in older adults

Using a population-based hospital discharge registry with E codes, we examine the 1989 hospitalizations of older adults in Washington State for fall-related injuries. Fall-related trauma accounted for 5.3% of all hospitalizations of older adults, with hospital charges totaling $53,346,191, and resulted in discharge to nursing care more often than other such hospitalizations. An annual hospitalization rate of 13.5 per 1000 persons and an annual cost of $92 per person is reported. The importance of preventing fall-related injuries in older adults is discussed.

Mortality, disability, and falls in older persons: the role of underlying disease and disability

BACKGROUND

Falls are prevalent in older persons and can have serious consequences.

METHODS

Data from the Longitudinal Study on Aging were analyzed to study the relationship between falls and both mortality and functional status in 4270 respondents age 70 and over. The effects of demographic traits, chronic conditions, and disability present at baseline were controlled for by means of multivariable analyses.

RESULTS

Risk of death within 2 years was greater for both single fallers (crude odds ratio [OR], 1.5; 95% confidence interval [CI], 1.1-2.0) and multiple fallers (crude OR, 2.2; 95% CI, 1.7-2.8). This excess risk was dissipated when selected covariates were added to the model. No crude or adjusted association was evident between single falls and functional impairment; however, multiple falls were an independent risk factor (adjusted OR, 1.6; 95% CI, 1.2-2.0).

CONCLUSIONS

Multiple falls in older persons increase risk of functional impairment and may indicate underlying conditions that increase risk of death.

Incidence of falling injuries leading to medical treatment in the elderly

The incidence of falling injuries leading to medical treatment was described by sex, age, marital status, education, amount of daily motion, self-perceived health, mechanism of fall and severity of injury. Material was collected regarding persons aged 65 years or over seeking medical treatment due to a fall during a period of one year. Altogether 3.8% of the elderly population (men: 2.5%; women: 4.4%) sought medical treatment due to a fall at least once during this year. When repeated falls were taken into account, the total incidence rate was 5.5 per 100 persons per year. The cumulative incidence rate (percentage of persons seeking medical treatment due to a fall) of women was higher than that of the men and in both sexes it increased with age. It was also higher for unmarried, widowed or divorced persons than for married ones, and higher in less educated persons than in better educated ones. It was also higher in persons with a low amount of daily motion or poor self-perceived health than in persons with a moderate or high amount of daily motion or good health status. The multivariate analyses based on log-linear models showed two-term interactions. A low amount of daily motion, poor self-perceived health and high age were independently related to the occurrence of a fall leading to medical treatment in both sexes.

Risk factors for falls as a cause of hip fracture in women. The Northeast Hip Fracture Study Group

BACKGROUND

Although even in the elderly most falls are not associated with fractures, over 90 percent of hip fractures are the result of a fall. Few studies have assessed whether the risk factors for falls are also important risk factors for hip fracture.

METHODS

To examine the importance of risk factors for falls in the epidemiology of hip fracture, we performed a case-control study of 174 women (median age, 80 years) admitted with a first hip fracture to 1 of 30 hospitals in New York and Philadelphia. Controls, matched to the case patients according to age and hospital, were selected from general surgical and orthopedic surgical hospital services. Information was obtained by direct interview.

RESULTS

As measured by the odds ratio, increased risks for hip fracture were associated with lower-limb dysfunction (odds ratio = 1.7; 95 percent confidence interval, 1.1 to 2.8), visual impairment (odds ratio = 5.1; 95 percent confidence interval, 1.9 to 13.9), previous stroke (odds ratio = 2.0; 95 percent confidence interval, 1.0 to 4.0), Parkinson's disease (odds ratio = 9.4; 95 percent confidence interval, 1.2 to 76.1), and use of long-acting barbiturates (odds ratio = 5.2; 95 percent confidence interval, 0.6 to 45.0). Of the controls, 44 (25 percent) had had a recent fall. The case patients were more likely than these controls to have fallen from a standing height or higher (odds ratio = 2.4; 95 percent confidence interval, 1.0 to 5.7). Of those with hip fracture the younger patients (less than 75 years old) were more likely than the older ones (greater than or equal to 75 years old) to have fallen on a hard surface (odds ratio = 1.9; 95 percent confidence interval, 1.04 to 3.7).

CONCLUSIONS

A number of factors that have been identified as risk factors for falls are also associated with hip fracture, including lower-limb dysfunction, neurologic conditions, barbiturate use, and visual impairment. Given the prevalence of these problems among the elderly, who are at highest risk, programs to prevent hip fracture should include measures to prevent falls in addition to measures to slow bone loss.

Injuries in an elderly inner-city population

Even though injuries are a leading cause of morbidity and mortality among the elderly in the United States, no comprehensive population-based study of nonfatal and fatal injuries has been carried out in an elderly minority inner-city population. To study injuries in this population, we developed an active surveillance system as part of a large injury prevention program in a poor urban black community. We report 577 cases of nonfatal and fatal injuries in a community of 12,139 persons 65 years of age and older that resulted in emergency room treatment or death between March 1, 1987, and February 29, 1988. Nearly 5% of the elderly population was treated at an emergency room for, or died as a result of, an injury during the study period; the overall injury rate was 48 injuries per 1,000 persons. Injury rates for older women exceeded those for older men and increased with advancing age in both sexes. Fall injuries accounted for 312 (54%) of all injuries and 75% of all hospitalizations for injury. Motor vehicle incidents and violence were the second and third most common injuries, accounting for 13% and 7% of injuries, respectively. Given the predominance of falls relative to other injuries, prevention of falls should receive major emphasis in injury prevention efforts in inner-city minority populations.