Head injuries in the elderly

High Long-Term Mortality Rate in Elderly Patients with Mild Traumatic Brain Injury and Subdural Hematoma due to Ground-Level Fall: Neurosurgery's Hip Fracture?

BACKGROUND

Moderate-to-severe traumatic brain injury (TBI) is a major source of morbidity and mortality in elderly patients. Little is known about long-term mortality in elderly patients following mild, nonfatal TBI and how the injury mechanism predicts survival. This study aimed to compare long-term mortality in elderly patients with mild TBI and traumatic subdural hematoma (tSDH) due to ground-level fall (GLF) versus those with TBI and tSDH due to another cause (i.e., non-ground-level fall [nGLF]).

METHODS

This retrospective study comprised 288 patients ≥60 years old from a single Level I trauma center with tSDH and Glasgow Coma Scale scores 13-15.

RESULTS

Median follow-up after initial TBI presentation was 2.9 years for the GLF group and 2.4 years for the nGLF group. During follow-up, 98 patients died, and median survival for all elderly patients with mild TBI and tSDH was 4.6 years. The GLF group had a higher mortality rate than the nGLF group, with 93 patients in GLF group dying during follow-up compared with 5 in nGLF group (P < 0.0001). The annual death rate for patients in the GLF group was 12.5% per year. For patients 60-69 years old, 39% in GLF group died compared with 4% in nGLF group during follow-up (P = 0.0002). Likewise, for patients 70-79 years old, 29% in GLF group died compared with 7% in nGLF group (P = 0.021). Finally, 56% of patients >80 years old in GLF group compared with 18% in nGLF group (P = 0.11).

CONCLUSIONS

Elderly patients with mild TBI and tSDH due to GLF have significantly higher long-term mortality than patients with injuries due to nGLF.

Predictors of Mortality, Withdrawal of Life-Sustaining Measures, and Discharge Disposition in Octogenarians with Subdural Hematomas

OBJECTIVE

Risk factors for mortality in patients with subdural hematoma (SDH) include poor Glasgow Coma Scale (GCS) score, pupil nonreactivity, and hemodynamic instability on presentation. Little is published regarding prognosticators of SDH in the elderly. This study aims to examine risk factors for hospital mortality and withdrawal of life-sustaining measures in an octogenarian population presenting with SDH.

METHODS

A prospectively collected multicenter database of 3279 traumatic brain injury admissions to 45 different U.S. trauma centers between 2017 and 2019 was queried to identify patients aged >79 years old presenting with SDH. Factors collected included baseline demographic data, past medical history, antiplatelet/anticoagulant use, and clinical presentation (GCS, pupil reactivity, injury severity scale [ISS]). Primary outcome data included hospital mortality/discharge to hospice care and withdrawal of life-sustaining measures. Multivariate logistic regression analyses were used to identify factors independently associated with primary outcome variables.

RESULTS

A total of 695 patients were isolated for analysis. Of the total cohort, the rate of hospital mortality or discharge to hospice care was 22% (n = 150) and the rate of withdrawal of life-sustaining measures was 10% (n = 66). A multivariate logistic regression model identified GCS <13, pupil nonreactivity, increasing ISS, intraventricular hemorrhage, and neurosurgical intervention as factors independently associated with hospital mortality/hospice. Congestive heart failure (CHF), hypotension, GCS <13, and neurosurgical intervention were independently associated with withdrawal of life-sustaining measures.

CONCLUSIONS

Poor GCS, pupil nonreactivity, ISS, and intraventricular hemorrhage are independently associated with hospital mortality or discharge to hospice care in patients >80 years with SDH. Pre-existing CHF may further predict withdrawal of life-sustaining measures.

Characteristics of outpatient emergency department visits of nursing home residents: an analysis of discharge letters

BACKGROUND

Unplanned emergency department (ED) visits of nursing home residents (NHR) are common, with many transfers not leading to hospitalization. However, there is little research on what diagnostic and therapeutic measures are performed during visits.

AIMS

We analyzed underlying diagnoses, characteristics and performed medical procedures of unplanned outpatient ED visits by NHR.

METHODS

We conducted a multi-center study of 14 nursing homes (NHs) in northwestern Germany in 03/2018-07/2019. Hospital transfers were documented by nursing staff using a standardized questionnaire for 12 months. In addition, discharge letters were used to collect information about the respective transfer, its reasons and the extend of the medical services performed in the ED.

RESULTS

A total of 161 unplanned ED visits were included (mean age: 84.2 years; 68.3% females). The main transfer reasons were trauma (59.0%), urinary catheter and nutritional probe problems (overall 10.6%; male NHR 25.5%) and altered mental state (9.9%). 32.9% where discharged without imaging or blood test prior. 67.4% of injured NHR (n = 95) required no or only basic wound care. Catheter-related problems (n = 17) were mainly treated by changing an existing suprapubic catheter (35.3%) and by flushing the pre-existing catheter (29.4%).

DISCUSSION

Our data suggest that the diagnostic and therapeutic interventions performed in ED, often do not exceed general practitioner (GP) care and many ED visits seem to be unnecessary.

CONCLUSION

Better coordination and consultation with GPs as well as better training of nursing staff in handling catheter problems could help to reduce the number of ED visits.

Predicting mortality in traumatic intracranial hemorrhage

OBJECTIVE

Traumatic intracranial hemorrhage (tICH) is a significant source of morbidity and mortality in trauma patients. While prognostic models for tICH outcomes may assist in alerting clinicians to high-risk patients, previously developed models face limitations, including low accuracy, poor generalizability, and the use of more prognostic variables than is practical. This study aimed to construct a simpler and more accurate method of risk stratification for all tICH patients.

METHODS

The authors retrospectively identified a consecutive series of 4110 patients admitted to their institution's level 1 trauma center between 2003 and 2013. For each admission, they collected the patient's sex, age, systolic blood pressure, blood alcohol concentration, antiplatelet/anticoagulant use, Glasgow Coma Scale (GCS) score, Injury Severity Score, presence of epidural hemorrhage, presence of subdural hemorrhage, presence of subarachnoid hemorrhage, and presence of intraparenchymal hemorrhage. The final study population comprised 3564 patients following exclusion of records with missing data. The dependent variable under study was patient death. A k-fold cross-validation was carried out with the best models selected via the Akaike Information Criterion. These models risk stratified the study partitions into grade I (< 1% predicted mortality), grade II (1%-10% predicted mortality), grade III (10%-40% predicted mortality), or grade IV (> 40% predicted mortality) tICH. Predicted mortalities were compared with actual mortalities within grades to assess calibration. Concordance was also evaluated. A final model was constructed using the entire data set. Subgroup analysis was conducted for each hemorrhage type.

RESULTS

Cross-validation demonstrated good calibration (p < 0.001 for all grades) with a mean concordance of 0.881 (95% CI 0.865-0.898). In the authors' final model, older age, lower blood alcohol concentration, antiplatelet/anticoagulant use, lower GCS score, and higher Injury Severity Score were all associated with greater mortality. Subgroup analysis showed successful stratification for subarachnoid, intraparenchymal, grade II-IV subdural, and grade I epidural hemorrhages.

CONCLUSIONS

The authors developed a risk stratification model for tICH of any GCS score with concordance comparable to prior models and excellent calibration. These findings are applicable to multiple hemorrhage subtypes and can assist in identifying low-risk patients for more efficient resource allocation, facilitate family conversations regarding goals of care, and stratify patients for research purposes. Future work will include testing of more variables, validation of this model across institutions, as well as creation of a simplified model whose outputs can be calculated mentally.

Risk factors for intracranial lesions and mortality in older patients with mild traumatic brain injuries

PRIMARY OBJECTIVE

To identify risk factors for intracerebral lesion (ICL) in older adults with mild traumatic brain injury (MTBI) and evaluate the influence of comorbidities on outcomes.

RESEARCH DESIGN

Prospective cohort study.

METHODS AND PROCEDURES

Information was gathered on clinical history/examination, cranial computed tomography, admission Glasgow Coma Scale (GCS) score, analytical and coagulation findings, and mortality at 1 week post-discharge. Bivariate and multivariate logistic regression analyses were performed, calculating odds ratios for ICL with 95% confidence interval. P < 0.05 was considered significant.

MAIN OUTCOMES AND RESULTS

Data were analyzed on 504 patients with mean±SD age of 79.37 ± 8.06 years. Multivariate analysis showed that traffic accident, GCS score of 14/15, transient consciousness loss, nausea, and receipt of antiplatelets were predictors of ICL, while SRRI and/or benzodiazepine intake was a protective factor. A score was assigned to patients by rounding OR values, and a score ≥1 indicated moderate/high risk of ICL.

CONCLUSIONS

MTBI management should be distinct in over-60 year-olds, who may not present typical symptoms, with frequent comorbidities. Knowledge of risk factors for post-MTBI ICL, associated with higher mortality, is important to support clinical decision-making. Further research is warranted to verify our novel finding that benzodiazepines and/or SSRI inhibitors may act as neuroprotectors.

Interactive eBooks in educating patients and their families about head injury regardless of age

OBJECTIVES

Traumatic Brain Injury (TBI) is a common and debilitating injury that is particularly prevalent in patients over 60. Given the influence of head injury on dementia (and vice versa), and the increased likelihood of ground-level falls, elderly patients are vulnerable to TBI. Educational interventions can increase knowledge and influence preventative activity to decrease the likelihood of further TBI. We sought to determine the efficacy of interactive tablet-based educational interventions in elderly patients on self-reported knowledge.

PATIENTS AND METHODS

Patients and family members, ages 20-90, presenting to a NeuroTrauma clinic completed a pre-survey to assess baseline TBI or concussion knowledge, depending on their diagnosis. Participants then received an interactive electronic book (eBook), or a text-based pamphlet with identical information, and completed a post-survey to test interim knowledge improvement.

RESULTS

All participants (n=180), regardless of age, had significantly higher post-survey scores (p<0.01, 95% CI). Elderly participants who received the eBook (n=39) scored lower than their younger counterparts despite higher pre-survey scores (p<0.01, 95% CI). All participants who received the eBook (n=20, 90) significantly improved on the post-survey (p<0.01, 95% CI) when compared to participants who received the paper pamphlets (n=10, 31). All participants significantly preferred the eBook (p<0.01, 95% CI).

CONCLUSIONS

We demonstrated that interactive educational interventions are effective in the elderly TBI population. Enhanced educational awareness in the elderly population, especially patients at risk or with prior TBI, may prevent further head injury by educating patients on the importance of avoiding further head injury and taking precautionary measures to decrease the likelihood of further injury.

Risk factors of delayed surgical evacuation for initially nonoperative acute subdural hematomas following mild head injury

BACKGROUND

Although the majority of patients with minimal acute subdural hematomas (aSDHs) can be managed conservatively, some require delayed aSDH evacuation due to hematoma enlargement. This study was designed to determine the risk factors associated with delayed hematoma enlargement leading to surgery in patients with aSDHs who did not initially require surgical intervention.

METHODS

From 2002 to 2012, 98 patients were treated for nonoperative aSDHs following mild head injury (Glasgow Coma Scale scores of 13-15). The outcome variables were radiographic evidence of SDH enlargement on serially obtained computed tomography (CT) images and later surgical evacuation. Univariate and multivariate analyses were applied to both the demographic and initial radiographic features to identify risk factors for SDH progression and surgery.

RESULTS

Overall, 64 patients (65 %) revealed minimal SDH or spontaneous hematoma resolution (conservative group) with conservative management at their last follow-up CT scan. The remaining 34 patients (35 %) received delayed hematoma evacuation (delayed surgery group) a median of 17 days after the head trauma. There were no significant differences between the two groups for baseline characteristics, including age, injury type, degree of brain atrophy, prior history of antithrombotic drugs, and coagulopathy. The presence of cerebral contusions and subarachnoid hemorrhages was more common in the conservative group (p = 0.003 and p = 0.003, respectively). On multivariate analysis, hematoma volume (p = 0.01, odds ratio [OR] = 1.094, 95 % confidence interval [CI] = 1.021-1.173) and degree of midline shift (p = 0.01, OR = 1.433, 95 % CI = 1.088-1.888) on the initial CT scan were independently associated with delayed hematoma evacuation.

CONCLUSIONS

A critical proportion of patients with minimal aSDHs occurring after mild head injury can progress over several weeks and require hematoma evacuation. Especially patients with a large initial SDH volume and accompanying midline shift require careful monitoring of hematoma progression.

Optimal Design of Honeycomb Material Used to Mitigate Head Impact

This paper presents a study of the impact resistance of honeycomb structure with the purpose to mitigate impact forces. The objective is to aid in the choice of optimal parameters to minimize the thickness of the honeycomb structure while providing adequate protection to prevent injury due to head impact. Studies are presented using explicit finite element analysis representing the case of an unprotected drop of a rigid impactor onto a simulated floor consisting of vinyl composition tile and concrete. Analysis of honeycomb material to reduce resulting accelerations is also presented where parameters such as honeycomb material modulus, wall thickness, cell geometry and structure depth are compared to the unprotected case. A simplified analysis technique using a genetic algorithm is presented to demonstrate the use of this method to select a minimum honeycomb depth to achieve a desired acceleration level at a given level of input energy. It is important to select a minimum material depth in that smaller dimensions lead toward more aesthetic design that increase the likelihood of that the device is used.

Impact of age on long-term recovery from traumatic brain injury

OBJECTIVE

To determine whether older persons are at increased risk for progressive functional decline after traumatic brain injury (TBI).

DESIGN

Longitudinal cohort study.

SETTING

Traumatic Brain Injury Model Systems (TBIMS) rehabilitation centers.

PARTICIPANTS

Subjects enrolled in the TBIMS national dataset.

INTERVENTIONS

Not applicable.

MAIN OUTCOME MEASURES

Disability Rating Scale (DRS), FIM instrument cognitive items, and the Glasgow Outcome Scale-Extended.

RESULTS

Participants were separated into 3 age tertiles: youngest (16-26y), intermediate (27-39y), and oldest (> or =40y). DRS scores were comparable across age groups at admission to a rehabilitation center. The oldest group was slightly more disabled at discharge from rehabilitation despite having less severe acute injury severity than the younger groups. Although DRS scores for the 2 younger groups improved significantly from year 1 to year 5, the greatest magnitude of improvement in disability was seen among the youngest group. In addition, after dividing patients into groups according to whether their DRS scores improved (13%), declined (10%), or remained stable (77%) over time, the likelihood of decline was found to be greater for the 2 older groups than for the youngest group. A multiple regression model showed that age has a significant negative influence on DRS score 5 years post-TBI after accounting for the effects of covariates.

CONCLUSIONS

This study supported our primary hypothesis that older patients show greater decline over the first 5 years after TBI than younger patients. In addition, the greatest amount of improvement in disability was observed among the youngest group of survivors. These results suggest that TBI survivors, especially older patients, may be candidates for neuroprotective therapies after TBI.

Comparison of functional outcome following acute care in young, middle-aged and elderly patients with traumatic brain injury

PRIMARY OBJECTIVE

To compare functional physical and cognitive outcome of patients in three age groups with mild, moderate and severe traumatic brain injury (TBI) at discharge from acute care.

RESEARCH DESIGN

Retrospective database review.

METHODS AND PROCEDURES

Scores on the Extended Glasgow Outcome Scale (GOSE) and on the FIM instrument,1 discharge destination and length-of-stay (LOS) were gathered and compared for 2327 patients with TBI admitted to a level 1 trauma hospital from 1997-2003 divided into three age groups; 971 patients between 18-39 years, 672 between 40-59 years and 684 aged 60-99 years.

MAIN OUTCOMES AND RESULTS

Relative to younger adults with similar TBI severity, elderly patients showed worse outcome on the GOSE and FIM instrument (physical and cognitive ratings) and longer LOS. No difference was observed between the young and middle-aged groups except for cognitive FIM ratings and LOS for severe TBI. A higher percentage of elderly patients went to in-patient rehabilitation, to long-term care facilities or died compared to young and middle-aged patients. A higher number of young and middle-aged patients were discharged home.

CONCLUSIONS

Further development of services in early rehabilitation as well as post-rehabilitation geared to the specific needs of the elderly patient with TBI is required as the population ages.

The CDC traumatic brain injury surveillance system: characteristics of persons aged 65 years and older hospitalized with a TBI

OBJECTIVE

To examine the epidemiologic and clinical characteristics of older persons (ie, those aged 65-74, 75-84, and > or = 85 years) hospitalized with traumatic brain injury (TBI).

METHODS

Data from the 1999 CDC 15-state TBI surveillance system were analyzed.

RESULTS

In 1999, there were 17,657 persons 65 years and older hospitalized with TBI in the 15 states for an age-adjusted rate of 155.9 per 100,000 population. Rates among persons aged 65 years or older increased with age and were higher for males. Most TBIs resulted from fall- or motor vehicle (MV)-traffic-related incidents. Most older persons with TBI had an initial TBI severity of mild (73.4%); however, the proportions of both moderate and severe disability for those discharged alive and of in-hospital mortality were relatively high (23.5%, 9.7%, and 12%, respectively). Persons who fell were also more likely to have had 3 or more comorbid conditions than were those who sustained a TBI from an MV-traffic incident.

CONCLUSIONS

TBI is a substantial public health problem among older persons. As the population of older persons continues to increase in the United States, the need to design and implement proven and cost-effective prevention measures that focus on the leading causes of TBI (unintentional falls and MV-traffic incidents) becomes more urgent.

Cranial Surgery Among Medicare Beneficiaries

BACKGROUND

This article examines the incidence of inpatient cranial surgery among Medicare beneficiaries. Many of these surgeries are trauma related or reflect chronic disabilities. The costs of care and the mortality rates are high for these patients.

METHODS

A retrospective study examined the inpatient discharge data on Medicare fee-for-service beneficiaries during FY 1997 for diagnosis-related groups 1, 2, and 484. Incidence patterns, length of hospital stay, and mortality were examined by age, race, sex, source of admission, and discharge destination.

RESULTS

Approximately 86% of the Medicare cranial surgery patients were 65 years of age or older, but only 10.2% were 85 years of age or older. The average patient age was 72 years. Nearly 51% of the patients were male, and 86.3% were white. Approximately 35% of the patients were admitted from the emergency room. The average length of stay was 9.6 days, and the average intensive care unit stay was 3.5 days. Whereas 42.3% of the patients were discharged to home, 44.6% were discharged to postacute care, and 10.9% died in the hospital. The average inpatient charge was $30,746.

CONCLUSIONS

Cranial surgery in the Medicare population results in high inpatient mortality and high rates of postacute care use, especially as patient age increases.

The use of head computed tomography in elderly patients sustaining minor head trauma

The study objectives were to ascertain historical and clinical criteria differentiating intracranial injury (ICI) in elderly patients with minor head trauma (MHT), and determine applicability of current head computed tomography (CT) scan indications in this population. A 12-month retrospective chart review was performed at a community teaching hospital with 34,000 annual Emergency Department (ED) visits. Included were patients > or = 65 years old sustaining MHT with a Glasgow Coma Scale (GCS) score of 13-15 who had a CT scan performed during their hospital stay. Data included: injury mechanism, symptoms, signs, GCS, anticoagulation use or studies, presence of alcohol or drug, CT scan result, diagnosis, and outcome and intervention(s). There were 133 patients, with 19 (14.3%) suffering ICI. Four ICI patients required neurosurgical intervention. The mean age was 80.4 years and 66% were female. Four of 19 ICI patients (21%) had a GCS of 15, no neurologic symptoms, alcohol use or anticoagulation. Only 1 of 13 signs and symptoms correlated with ICI. In this study, no useful clinical predictors of intracranial injury in elderly patients with MHT were found. Current protocols based on clinical findings may miss 30% of elderly ICI patients. Head CT scan is recommended on all elderly patients with MHT.

Population based study of hospitalised fall related injuries in older people

OBJECTIVE

This study aimed to identify the distribution of fall related injury in older people hospitalised for acute treatment of injury, in order to direct priorities for prevention.

SETTING

A follow up study was conducted in the Brisbane Metropolitan Region of Australia during 1998.

METHODS

Medical records of patients aged 65 years and over hospitalised with a fall related injury were reviewed. Demographic and injury data were analysed and injury rates calculated using census data as the denominator for the population at risk.

RESULTS

From age 65, hospitalised fall related injury rates increased exponentially for both males and females, with age adjusted incidence rates twice as high in women than men. Fractures accounted for 89% of admissions, with over half being to the hip. Males were significantly more likely than females to have fractured their skull, face, or ribs (p<0.01). While females were significantly more likely than males to have fractured their upper or lower limbs (p<0.01), the difference between proportions of males and females fracturing their hip was not significant. Males were more likely than females (p<0.01) to have fall related head injuries (13% of admissions). Compared with hip fractures, head injuries contributed significantly to the burden of injury in terms of severity, need for intensive care, and excess mortality.

CONCLUSIONS

The frequency and impact of hip fractures warrants continued emphasis in falls program interventions for both males and females to prevent this injury. However, interventions that go beyond measures to slow and protect against bone loss are also needed to prevent fall related head injuries.

Traumatic brain injury in the elderly: increased mortality and worse functional outcome at discharge despite lower injury severity

OBJECTIVE

The purpose of this study was to compare data obtained from a statewide data set for elderly patients (age > 64 years) that presented with traumatic brain injury with data from nonelderly patients (age > 15 and < 65 years) with similar injuries.

METHODS

The New York State Trauma Registry from January 1994 through December 1995, from trauma centers and community hospitals excluding New York City (45,982 patients), was examined. Head-injured patients were identified by International Classification of Diseases, Ninth Revision diagnosis codes. A relative head injury severity scale (RHISS) was constructed on the basis of groups of these codes (range, 0 = none to 3 = severe). Comparisons were made with nonelderly patients for mortality, Glasgow Coma Scale (GCS) score at admission and discharge, Injury Severity Score, New Injury Severity Score, and RHISS. Outcome was assessed by a Functional Independence Measure score in three major domains: expression, locomotion, and feeding. Data were analyzed by the chi2 test and Mann-Whitney U test, with p < 0.05 considered significant.

RESULTS

There were 11,772 patients with International Classification of Diseases, Ninth Revision diagnosis of head injury, of which 3,244 (27%) were elderly. There were more male subjects in the nonelderly population (78% male subjects) compared with the elderly population (50% men). Mortality was 24.0% in the elderly population compared with 12.8% in the nonelderly population (risk ratio, 2.2; 95% confidence interval, 1.99-2.43). The elderly nonsurvivors were statistically older, and mortality rate increased with age. Stratified by GCS score, there was a higher percentage of nonsurvivors in the elderly population, even in the group with only moderately depressed GCS score (GCS score of 13-15; risk ratio, 7.8; 95% confidence interval, 6.1-9.9 for elderly vs. nonelderly). Functional outcome in all three domains was significantly worse in the elderly survivors compared with the nonelderly survivors.

CONCLUSION

Elderly traumatic brain injury patients have a worse mortality and functional outcome than nonelderly patients who present with head injury even though their head injury and overall injuries are seemingly less severe.

Outcome following traumatic brain injury in the elderly: a critical review

BACKGROUND

The elderly are at risk for traumatic brain injury (TBI), but their outcome following these injuries remains unclear.

OBJECTIVE

This paper critically reviews research done to date on cognitive and functional outcome following TBI in the elderly.

METHODS

MEDLINE and PSYCHLIT databases going back to 1965 were searched.

RESULTS

Studies suggest that TBI results in adverse cognitive and functional outcomes in the elderly. There is uncertainty as to whether TBI is a significant risk factor for Alzheimer's disease (AD). Methodological problems in these studies include selection bias, small samples, retrospective analyses, and, particularly, the failure to address the role of pre-morbid functioning. These problems limit the strength of the outcome studies, and may account for the equivocal findings on AD risk.

CONCLUSIONS

It is premature to conclude from the published research to date that the elderly have a uniformly poor outcome following TBI. Directions for further research are suggested.

Neurobehavioral consequences of closed head injury in the elderly

The assessment of neurobehavioural outcome after head injury in older patients (> 60 year old) has met with difficultives, due to the obstacles in finding subjects who would constitute an appropriate control group. In the present study, survivors of closed head injury (CHI) of this age group were compared to two control groups: (1) orthopaedic patients (OP) who were injured in similar circumstances but did not sustain head injury and (2) healthy, age-matched volunteers (HC). Compared with HC, CHI and OP were impaired on word fluency, memory and reasoning. No differences were found between CHI and the OP. These results may indicate that, rather than resulting only from the head injury brought about by falling, the cognitive decline may predate the injury and increase the risk of accidents in old age.

Fatal head injuries in ground-level falls

We analyzed 75 cases of fatal ground-level falls that were investigated by the King County Medical Examiner over a 48-month period, with autopsies performed on 87% of the deaths: 69% of the cases were men and 61% occurred in ages > or = 70 years; only 12% were aged < 50 years, with the youngest aged 28 years. Most of the falls occurred in or about the residence, and many individuals were known to have fallen onto hard surfaces. In 77% of cases there was significant pre-existing natural disease, mostly cardiovascular disease. Liver disease was more frequently a contributing factor in those aged < 50 years. Ethanol was present in 48% of those cases tested, more frequently present in men than in women. Basal skull fractures were present in 37% of cases, and acute subdural hematomas, the most common intracranial lesion, were present in 85%. We concluded that fatal ground-level falls were much more common in elderly persons, owing to a greater predisposition to falling, as well as intrinsic age-related changes, including a greater susceptibility to acute subdural hematoma.