Increasing importance of the elderly in a trauma system

Wiser with Age? Increased Per-Surgeon Elderly Patient Volume is Associated with Lower Postinjury Complications

We hypothesize that higher elderly patient volume per trauma surgeon is associated with fewer clinical complications. This is a retrospective cohort study which included elderly patients admitted to trauma surgery service within a five-year period, from 2009 to 2013, at two Level I trauma centers in Florida. Trauma surgeons were stratified into three groups depending on patient volume. Primary outcomes were postinjury complications and in-hospital mortality, and secondary outcomes were hospital length of stay (LOS), intensive care unit LOS, and ventilator days. A total of 2379 elderly patients were included in this study. Elderly patient volume per surgeon did not significantly differ based on years in practice after fellowship (P = 0.88). The higher volume group had lower incidence of complications (15% complication rate, P = 0.02), compared with the average and low-volume group (18.1 and 21%, respectively), and had significantly lower rates of acute respiratory failure (P = 0.04) and acute renal failure (P = 0.004). In-hospital mortality was not affected by volume. Hospital LOS was decreased in the higher volume group (mean LOS 7.4 days, P < 0.001). There appears to be a relationship between elderly patient volume and outcome, independent of surgeon years of experience.

What are the differences in injury patterns of young and elderly traffic accident fatalities considering death on scene and death in hospital?

Older traffic participants have higher risks of injury than the population up to 65 years in case of comparable road traffic accidents and further, higher mortality rates at comparable injury severities. Rib fractures as risk factors are currently discussed. However, death on scene is associated with hardly survivable injuries and might not be a matter of neither rib fractures nor age. As 60% of traffic accident fatalities are estimated to die on scene, they are not captured in hospital-based trauma registries and injury patterns remain unknown. Our database comprises 309 road traffic fatalities, autopsied at the Institute of Legal Medicine Munich in 2004 and 2005. Injuries are coded according to Abbreviated Injury Scale, AIS© 2005 update 2008 [1]. Data used for this analysis are age, sex, site of death, site of accident, traffic participation mode, measures of injury severity, and rib fractures. The injury patterns of elderly, aged 65+ years, are compared to the younger ones divided by their site of death. Elderly with death on scene more often show serious thorax injuries and pelvic fractures than the younger. Some hints point towards older fatalities showing less frequently serious abdominal injuries. In hospital, elderly fatalities show lower Injury Severity Scores (ISSs) compared to the younger. The number of rib fractures is significantly higher for the elderly but is not the reason for death. Results show that young and old fatalities have different injury patterns and reveal first hints towards the need to analyze death on scene more in-depth.

Immunesenescence and inflammaging: A contributory factor in the poor outcome of the geriatric trauma patient

Compared to younger patients, traumatic injury in older patients is associated with increased mortality and a range of adverse outcomes such as higher rates of infectious episodes, longer length of hospital stay and poor functional outcome at follow up. Data emerging from human and murine-based studies suggest age-related changes in immune function, collectively termed immunesenescence, and the chronic sub-clinical systemic inflammatory state of older adults, termed inflammaging, may contribute to these poor outcomes. Here, we review the findings of these studies, whose results demonstrate that the geriatric trauma patient elicits an immune response to injury that is distinct to that of younger adults, being characterised by reduced immune cell activation, impaired function and abnormal haematopoiesis, defects that are accompanied by an altered inflammatory response that fails to return to a homeostatic baseline in the days following injury. Although considerable evidence is accumulating that demonstrates clear and significant age-related differences in the immune and inflammatory response to traumatic injury, our current understanding of the mechanism(s) that underlie these changes is limited. Future studies that provide a mechanistic explanation for the unique immune and inflammatory response of older adults to traumatic injury are therefore essential if we are to determine whether manipulation of the immune system has potential as a future therapeutic strategy by which to improve the outcome of the geriatric trauma patient.

Impact of age on the clinical outcomes of major trauma

PURPOSE

In view of demographic changes over the past few decades, the average age of trauma patients is progressively increasing. We therefore aimed to summarize the specific characteristics of geriatric trauma and to identify potential fields for further research to improve the care of elderly trauma patients.

METHODS

Review of the literature.

RESULTS

Due to the diverse risk factors (e.g., pre-existing conditions, limited physiological reserve), geriatric patients are prone to developing severe complications, even after less severe trauma. Yet, age is not considered as the only predictor of worse outcomes, and it should not be considered the only criterion for limiting care in those patients. It is crucial that age-specific treatment guidelines are developed to optimize the outcomes for senior trauma patients. Based on the current literature, these guidelines should emphasize the importance of field triage directly to a trauma center, along with the activation of the trauma team. Furthermore, early intensive monitoring, aggressive resuscitation, and time of surgical intervention are of upmost importance to reduce mortality.

CONCLUSION

The impact of several factors [age, premedical conditions (PMC), decreased physiological reserves, and impaired immune function] on the post-traumatic course of elderly trauma patients needs to be clarified in future experimental and clinical studies for the early identification of geriatric high-risk patients and for the development of age-adapted therapeutic strategies.

Age-related trends in severe injury hospitalization in Canada

BACKGROUND

We performed a population-based evaluation of age-related trends in severe injury hospitalization across Canada.

METHODS

We identified hospitalizations following severe injury (Injury Severity Score [ISS] > 15) between 2002 and 2009 using the Canadian National Trauma Registry. Age-standardized severe injury hospitalization rates were calculated using the direct method referencing the 2006 Canadian population. The annual percent change in hospitalization rates were estimated using negative binomial regression.

RESULTS

During the 8-year period, hospitalization rates for severe injury rose by 22% among individuals 65 years or older, compared with 10% among individuals younger than 65 years. Fall-related injuries accounted for 46% of all severe injury hospitalizations and increased by an average of 3% annually, with a twofold higher annual rate of increase among the elderly. Case-fatality rates declined by 10%, with the decline more than threefold higher among younger patients.

CONCLUSION

Elderly patients accounted for an increasing proportion of hospitalizations, highlighting important opportunities for injury prevention among this age group. Case-fatality rates, while declining among younger patients, remained stable in the elderly population, suggesting the need for better strategies to manage the complex care needs of these patients.

LEVEL OF EVIDENCE

Epidemiologic study, level III.

Prognosis and health-related quality of life in elderly patients after a mild to moderate trauma

The aims of this study were to compare outcome after a mild to moderate trauma in three subgroups of patients of increasing age (A1: <50, A2: 50-74, A3: >74 years) and to assess potential health-related quality of life (HRQOL) impairment. This is a follow-up study of a cohort of 418 trauma patients admitted to the High Dependency Unit of the Emergency Department of the University Hospital of Florence from July 2008 to February 2012. Six months after the event, a telephone interview using the Physical component summary (PCS) and Mental component summary (MCS) Health Composite Score (SF12) was conducted. Patients reported their QOL both at present and before trauma. In-hospital mortality was 10 of 418 (2.3 %); overall mortality was 27 of 244 (11 %) patients found at follow-up. No death was observed among A1 patients; overall mortality was (6/76) 7 % in A2 and (21/71) 30 % in A3 patients (p < 0.05 A1 vs A2, A1 vs A3 and A2 vs A3). Before the event, respectively, 94 and 96 % patients reported a normal MCS and PCS score (>39); after the event, the proportion of patients with a normal score value was significantly lower (MCS 70 %, p = 0.002; PCS 58 %, p < 0.0001). All subgroups showed a highly significant reduction in the scores' value due to the trauma. After the event, the proportion of patients with normal scores was significantly lower (all p < 0.0001, except for MCS score in A1 subgroup, who showed p = 0.013) within all subgroups. Elderly patients' prognosis was significantly worse compared with the younger counterpart; despite young patients' optimal outcome, HRQOL was uniformly reduced across all age groups.

Motor vehicle collision-related emergency department visits by older adults in the United States

OBJECTIVES

Motor vehicle collisions (MVCs) are the second most common cause of nonfatal injury among U.S. adults age 65 years and older. However, the frequency of emergency department (ED) visits, disposition, pain locations, and pain severity for older adults experiencing MVCs have not previously been described. The authors sought to determine these characteristics using information from two nationally representative data sets.

METHODS

Data from the 2008 Healthcare Cost and Utilization Project Nationwide Emergency Department Sample (NEDS) and the National Hospital Ambulatory Medical Care Survey (NHAMCS) were used to estimate MVC-related ED visits and ED disposition for patients 65 years and older. NHAMCS data from 2004 through 2008 were used to further characterize MVC-related ED visits.

RESULTS

  In 2008, the NEDS contained 28,445,564 patient visits, of which 760,356 (2.7%) were due to MVCs. The NHAMCS contained 34,134 patient visits, of which 1,038 (3.0%) were due to MVCs. National estimates of MVC-related ED visits by patients 65 years and older in 2008 are 226,000 (95% confidence interval [CI]=210,000 to 240,000) for NEDS and 270,000 (95% CI=185,000 to 355,000) for NHAMCS. Most older adults with MVC-related ED visits were sent home from the ED (proportion discharged NEDS 78%, 95% CI=78% to 79%; NHAMCS 77%, 95% CI=66% to 86%). During the years 2004 through 2008, of MVC-related ED visits by older adults not resulting in hospital admission, moderate or severe pain was reported in 61% (95% CI=52% to 70%) of those with recorded pain scores. Older patients sent home after MVC-related ED visits were less likely than younger patients to receive analgesics (35%, 95% CI=26% to 43% vs. 47%, 95% CI=44% to 50%) during their ED evaluations or as discharge prescriptions (52%, 95% CI=41% to 62% vs. 65%, 95% CI=61% to 68%).

CONCLUSIONS

In 2008, adults age 65 years or older made more than 200,000 MVC-related ED visits. Approximately 80% of these visits were discharged home from the ED, but the majority of discharged patients reported moderate or severe pain. Further studies of pain and functional outcomes in this population are needed.

The effect of sentinel injury on Medicare expenditures over time

OBJECTIVES

To examine the long-term effect of sentinel injury (unintentional injury involving serious health-related consequences) among older adults on Medicare expenditures.

DESIGN

Secondary data analysis of the Medicare Current Beneficiary Survey, a nationally representative survey of Medicare Beneficiaries.

SETTING

Noninstitutionalized community dwellers.

PARTICIPANTS

Older adults (N = 12,318) continuously enrolled in Medicare Fee-for-Service under Old Age Survivors Insurance Benefits surveyed between October 1998 and December 2004.

MEASUREMENTS

Monthly total Medicare expenditures served as the dependent variable. Injury status (preinjury, injury episode, postinjury) was identified from Medicare claims and specified as a set of dummy variables. Injury episodes began with the first index injury claim identified and ended when no further injury claims were found within 180 days. Population-averaged models using generalized estimating equation techniques were estimated to explore changes in Medicare expenditures over time after adjusting for casemix differences. A case-crossover design was used to compare monthly Medicare expenditures before and after sentinel injury events.

RESULTS

Fifteen percent of beneficiaries sustained at least one sentinel injury. Medicare expenditures increased sharply during sentinel injury episodes (β = 1.703, P < .001) and remained at least 28% higher than would otherwise be expected for 27 uninterrupted months following injury. Additive Medicare expenditures associated with sentinel injury over 3 years were estimated at $28,885.

CONCLUSION

Consequences of sentinel injury in older adults extend well beyond the period typically considered to be an acute injury episode. Better understanding of the long-term consequences of injury-related outcomes is needed to achieve public health goals of reducing injury and improving injury-related medical care.

Initial presentation of older injured patients to high-volume hospitals is not associated with lower 30-day mortality in Medicare data

OBJECTIVE

To evaluate whether survival of older patients with severe injuries is positively associated with initial presentation to high-volume trauma hospitals.

DESIGN

Historical cohort study.

SETTING

We analyzed Medicare fee-for-service records. Cases were classified by maximum Abbreviated Injury Score (AISmax); those with isolated hip fractures or AISmax <3 were excluded. The initial hospital (emergency department or inpatient) for each case was classified by its number of included inpatient cases.

PATIENTS

Patients aged >or=65 with principal injury diagnoses (ICD-9 800-959, excluding 905, 930-939, 958) admitted to hospitals or who died in emergency departments during 1999.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

Thirty-day mortality was determined using Medicare denominator data and modeled as a function of hospital volume, AISmax, age, gender, and comorbidity. We found that 95,867 patients (74,894 AISmax = 3; 17,932 AISmax = 4; 3,041 AISmax = 5) were managed in 4,391 hospitals. More than 90% of the interhospital transfers were from emergency departments, mostly from low-volume to high-volume hospitals, and were more frequent with greater severity. Regression models showed no difference in 30-day survival between patients taken first to low-volume hospitals (and possibly transferred) vs. patients taken directly to high-volume hospitals. Prior studies showing a positive or negative effect of hospital volume on survival of older patients could be replicated but their findings could not be generalized.

CONCLUSIONS

Existing systems of trauma care result in similar survival for older patients with serious injuries seen first at low-volume or high-volume hospitals.

Traumatic injury in the older adult from head to toe

This review demonstrates essential issues to consider when caring for older trauma patients, including baseline physical status, mental health, comorbidities, and risk factors for sequelae and future injuries. The impact of a traumatic injury on older adults is complex. Issues of normal aging, functional status, chronic health conditions, and response to treatment affect health care and related decisions. Studies that have examined outcomes for older trauma patients to date have been mainly descriptive or confined to a single institution, limiting our ability to generalize. Other studies, using large data sets, have provided some information regarding possible primary prevention strategies, yet have limitations in the individual level detail collected. Nevertheless, this review also demonstrates the dearth of available evidence-based recommendations that provides support to treatment protocols in this complex and diverse patient population. The lack of an evidence base to use in the management of older trauma patients demonstrates the critical need for research in this rapidly growing population. An example of one such area includes the use of pulmonary artery catheters in older trauma patients. Although evidence to date suggests that pulmonary artery catheters are of benefit in the management of patients with physiologic compromise, it is unclear whether using these published cardiac output management recommendations leads to improved outcomes. In light of newly published data suggesting equivocal benefit from use of pulmonary artery catheters, with increased side effects, this controversy is an important area for future research. Critical care nurses, with their emphasis on multidisciplinary, holistic practice, can expand their influence as essential members of the interdisciplinary team caring for older trauma patients by cultivating geriatric specialty knowledge. Older trauma patients would benefit greatly from this type of specialty nursing care during all phases of the recovery trajectory, particularly in terms of adequate symptom management and prevention of sequelae, as well as with timely and appropriate initiation of consultative services. Using the intersection of primary and secondary prevention as the overall guide for practice, critical care nurses and other health care providers who possess an understanding of aging processes and comorbid conditions can significantly improve outcomes for older adults with traumatic injuries.

A Feasibility Study of Methodological Issues and Short-Term Outcomes in Seriously Injured Older Adults

• Background For any given traumatic injury, older adults experience a longer hospitalization, more complications, and higher mortality than do younger patients.

• Objectives To prospectively identify problems in designing follow-up studies in seriously injured older adults without head injury and to examine outcomes after serious trauma in older adults who were sent to a level I trauma center.

• Methods A short-term descriptive follow-up design was used in which each patient served as his or her baseline. Eligible patients had injuries that required admission to an intensive care unit, a hospital length of stay longer than 72 hours, or surgery. Patients with isolated hip fractures, central nervous system injuries, and burn injuries were excluded. Data were collected by using standardized instruments during the acute hospital stay and 3 months after discharge from the hospital.

• ResultsDuring a representative 2-month period, 21% of a potential 77 subjects died in the hospital, 44% had cognitive impairment that precluded participation, and 17% declined to participate. Twenty older adults (mean age 73.5 years) who were injured in motor vehicle crashes (45%), falls (35%), or pedestrian accidents (15%) or who had gunshot wounds (5%) were enrolled. Ten percent died after discharge. Levels of physical disability at 3 months after discharge were higher than those before the injury (score on Sickness Impact Profile physical subscale 24.5 vs 10.9, P = .02), and psychological distress (Impact of Event Scale score 20.9) remained elevated.

• Conclusion Mortality, disability, and posttraumatic psychological distress after discharge are problems in seriously injured older adults.

Differences in survival, length of stay, and discharge disposition of older trauma patients admitted to trauma centers and nontrauma center hospitals

PURPOSE

To examine the relationship of level of care (trauma center [TC], nontrauma center [NTC] hospitals) on three outcomes: survival, length of stay, and discharge disposition.

DESIGN

Retrospective secondary analysis of a subset of data (1,418 patients age 65 to 99 years) from a large statewide study in which the purpose was to compare admission patterns (TCs and NTCs) of motor vehicle (MV) trauma patients according to age and sex. The New Jersey UB-92 Patient Discharge Data for 2000 were used in this analysis.

METHODS

Demographic and clinical variables were compared using descriptive data, independent samples t tests, Pearson chi square, and Mann-Whitney U analyses. Logistic regression and multiple regression analyses were performed to examine relationships between level of care and three outcome variables, survival, length of stay, and discharge disposition, while controlling for age and severity of injury.

RESULTS

NTC admission was the only predictor of survival and discharge to home, but injury severity was the strongest predictor of length of stay, followed by NTC care. The odds of survival and discharge home decreased slightly as age and injury severity increased.

CONCLUSIONS

This analysis indicated preliminary evidence that level of care influences survival, length of stay, and discharge disposition. Studies are warranted for researchers to examine the influence of postinjury variables, including complications, stress reaction, and depression on outcomes.

Cost estimation of injury-related hospital admissions in 10 European countries

BACKGROUND

Injuries are a major cause of total health care costs. Cost estimations may help identify injuries and high risk-groups to be considered for potential intervention.

METHODS

Hospital discharge registers of 10 European countries were used to estimate injury incidence. Consensus was reached between the participating countries about methodology, definition, classification, cost measurements, and valuation to maximize cross-national comparability of outcomes. The data of the countries were also used to give an estimate of the costs per capita by age, sex, type of injury, and external cause in Europe.

RESULTS

Large international differences were observed in injury incidence and associated costs related to hospital admissions, with relatively high costs per capita for Austria, followed by Denmark and Norway. In Greece, Italy, Ireland, and Wales, intermediate costs per capita were found, but these costs were relatively low for Spain, England, and the Netherlands. The patterns of costs by age, sex, injury type, and external cause are quite similar between the countries. For all countries, costs per capita increase exponentially in older age groups (age > or =65 years), due to the combined effect of high incidence and high costs per patient. The elderly females account for almost triple costs compared with same age males. Young children and male adolescents are also high-cost groups. Highest costs were found for hip fractures, fractures of the knee/lower leg, superficial injuries, skull-brain injuries, and spinal cord injuries. Home and leisure injuries (including sport injuries) and occupational injuries combined make a major contribution (86%) to the hospital costs of injury.

CONCLUSION

Elderly patients aged 65 years and older, especially women, consume a disproportionate share of hospital resources for trauma care, mainly caused by hip fractures and fractures of the knee/lower leg, which indicates the importance of prevention and investing in trauma care for this specific patient group.

Evaluating an Inclusive Trauma System Using Linked Population-Based Data

BACKGROUND

Federal and professional programs require "inclusive" trauma systems. We wished to evaluate an inclusive trauma system using administrative data combined from multiple sources.

METHODS

Ambulance reports, outpatient/inpatient discharge data, and/or death certificates were obtained for persons with injury diagnoses who received hospital services and/or died in Maine during 1998 to 2000. Records were unduplicated and joined using probabilistic record-linkage software. Case outcomes, determined from one or more linked records, included place of hospitalization, discharge status, and 30-day mortality.

RESULTS

Per 100,000 population annually, 11,100 injured persons were treated and released, 573 were admitted, and 51.3 died. Trauma centers received 37.0% of major cases directly and another 15.4% in transfer; 51.4% of injury deaths occurred without medical intervention, 21.2% occurred in trauma centers, 20.4% occurred in other hospitals, and 7.0% occurred after discharge from a hospital. Database queries produced comparative hospital statistics and identification of questionable outcomes.

CONCLUSION

Record linkage allows inexpensive description of an inclusive trauma system and may contribute to quality improvement.

Risk Adjustment for Injured Patients Using Administrative Data

BACKGROUND

Risk adjustment methods are needed for population-based studies of injured patients.

METHODS

Data were obtained from National Hospital Discharge Surveys, 1996 to 2000. International Classification of Diseases, Ninth Revision, Clinical Modification (ICD-9-CM) diagnoses were used to categorize Abbreviated Injury Scale score, Injury Severity Score, ICD-9-CM Injury Severity Score, injury mechanisms, and comorbidities. Regression models for weighted survey data were constructed from combinations of these classifications, plus age and sex, to predict mortality, length of stay (LOS), or discharge to long-term care (LTC).

RESULTS

Increased Abbreviated Injury Scale score, increased Injury Severity Score, or decreased ICD-9-CM Injury Severity Score were similarly associated with mortality, prolonged LOS, or more frequent LTC, as was increased age. Penetrating or burn mechanisms were associated with mortality and longer LOS; penetrating or vehicle mechanisms were associated with less frequent LTC. Different comorbidities affected LOS and LTC. Men had shorter LOS and less frequent LTC than women.

CONCLUSION

Hospital outcomes after injury are predictable from age, sex, and standard diagnosis groupings. Anatomic scales gave similar results when adjusted for other factors.

Trends in hospitalization after injury: older women are displacing young men

OBJECTIVE

To evaluate trends in hospitalization after injuries in the USA.

DESIGN

National Hospital Discharge Survey data from 1979 to 2000 were evaluated annually by age group, sex, injury severity score (ISS), length of stay, and discharge destination.

SETTING AND SUBJECTS

National probability sample of hospitalized patients.

INTERVENTIONS

None.

MAIN OUTCOME MEASURES

Incidence, duration, outcome, and population based rates of hospital admission after injuries.

RESULTS

The number of young males admitted to hospitals after injuries has decreased dramatically; older females are now the group most frequently admitted. Total days in the hospital have decreased in all age groups, but have declined less in the older population than in the younger population; furthermore, most patients aged 65 and over were formerly discharged home, but now most are discharged to long term care facilities. Overall hospitalization rates after injury have decreased in all age groups, but have declined less in the older population; furthermore, male and female hospitalization rates for serious injury (ISS at least 9, excluding isolated hip fracture) are decreasing in younger age groups while increasing in older age groups.

CONCLUSIONS

Older patients comprise a growing proportion of injuries requiring hospitalization. Trauma systems must address this change, and preventing injuries in older people is increasingly important.