Epidemiology of traumatic spinal cord injuries in Austria 2002-2012.

PURPOSE: The aim of this study was to analyse the epidemiological patterns (mortality, incidence of non-fatal cases and overall incidence), of traumatic spinal cord injuries (TSCI) in 2002-2012 in Austria. METHODS: TSCI-related deaths and hospital admissions in Austria 2002-2012 were obtained from Statistics Austria and analysed. Mortality rates, as well as non-fatal and overall incidence rates were calculated and compared across the age spectrum and by sex. Additionally, the main causes and demographic characteristics of victims were analysed. RESULTS: The crude overall incidence rate of TSCI was 16.96, CI 95 % 16.95-16.97 and the standardized incidence rate was 13.98, CI 95 % 13.97-13.99 per million (annual average rate). An annual increase in fatality rates was observed occurring mostly in the age group >65 years (Kendall's Tau = 0.1). Falls (mortality rate 19.58, CI 95 % 19.57-19.59) and injuries at home (incidence rate 56.57, CI 95 % 56.56-56.58) were the principal causes of fatal and non-fatal TSCI, respectively. Injuries to the neck region were the most common. All indicators were the highest for the age group >65 years: non-fatal incidence rate 23.55, CI 95 % 23.54-23.56; mortality rate 21.4, CI 95 % 21.39-21.41; and overall incidence rate 47.9, CI 95 % 47.89-47.91. A clear male dominance was observed (incidence rate ratio 1.9, CI 95 % 1.4-2.7). CONCLUSION: The population >65 years has been at the highest risk of TSCI in Austria for the analysed period and therefore preventive activities should be focused on this group. The increasing overall incidence of TSCI was driven by the increasing mortality rates that were highest in the age group >65 years. We advocate harmonization of epidemiological reporting especially regarding aetiology of TSCI in order to better inform policy makers and prevention.

Fatal traumatic brain injury in older adults in Austria 1980-2012: an analysis of 33 years.

BACKGROUND: traumatic brain injury (TBI) is a significant public health problem. Developed countries report a significant increase of TBI in older adults in the past decades. The objective of this study was to investigate the changes in TBI-related mortality in older Austrians (65 years or older) between 1980 and 2012 (33 years) and to identify possible causes for these changes. METHODS: data from Statistics Austria on mortality in Austria between 1980 and 2012 were screened and data on TBI-related mortality in adults aged 65 and older were extracted and analysed, based on the diagnostic codes of the International Classification of Diseases, 10th and 9th revision. Mortality rates were calculated for 5-year age groups; standardized mortality rates were calculated for the total. Mechanism of injury was analysed for all events, both sexes and individual age groups. RESULTS: between 1980 and 2012, 16,204 people aged 65 or older died from TBI in Austria; 61% of these were male. Fatal TBI cases and mortality rates increased in the oldest age groups (80 years or older). Half of the fatal TBI cases were caused by falls, 22% by traffic accidents and 17% by suicides. Rate of fall-related fatal TBI increased and rate of traffic accident-related fatal TBI decreased with age. CONCLUSION: preventive measures introduced in the past decades in the developed countries have contributed to a decrease in traffic injuries. However, falls in the older population are on the rise, mainly due to ageing of the population, throughout the reported period. It is important to take preventive measures to stop the epidemics of fall-related TBIs and fatalities in older adults.

Severity, Causes and Outcomes of Traumatic Brain Injuries Occurring at Different Locations: Implications for Prevention and Public Health.

AIM: Traumatic brain injuries (TBI) are a major public health problem. Although they are well studied, information on some aspects, such as the place of occurrence, is limited. The aim of this study was to describe the patterns of severity, causes and outcomes of TBI occurring at different locations and to identify the primary populations at risk of suffering TBI at each of the analysed locations. METHODS: 1,818 patients with TBI admitted to hospitals in Austria, Slovakia, Croatia, Bosnia, and Macedonia were analysed. Primary populations at risk, injury severity and extent along with short/long-term outcomes were analysed for TBI at each location. RESULTS: The highest mean age (57.9 years, p<0.001) was observed in injuries at home. The distribution of injury causes across the group was significantly different (p<0.001), with falls (39%) and traffic accidents (30%) being predominant. TBI occurring on roads or highways were the most severe (mean ISS=32.5, p<0.001; mean GCS=7.8, p<0.001). Injuries at home had the worst outcome (50% mortality, p<0.001 and 70% unfavourable outcome, p<0.001) whereas TBI at sport facilities or outdoors had the best outcome (24% mortality, 44% unfavourable outcome). When adjusted for age and severity, TBI occurring at home had the highest odds of mortality (OR=3.12, 95% CI=1.86-5.25) and unfavourable outcome (OR=2.51, 95% CI=1.54-4.08), compared to sports facility and outdoors as a reference. CONCLUSIONS: TBI at different locations display distinctive patterns as to causes, severity, outcome and populations at risk. Location is therefore a relevant epidemiological aspect of TBI and we advocate its inclusion in future studies. Definitions of primary populations at risk at different locations could help in targeted public health actions.

Hospital admissions for traumatic brain injury of Austrian residents vs. of visitors to Austria.

BACKGROUND: The goal was to compare epidemiology of hospital admissions for traumatic brain injury (TBI) in Austrian residents vs. visitors to Austria. METHODS: Data on all hospital admissions due to TBI (ICD-10 codes S06.0-S06.9; years 2009-2011) was provided by the Austrian Statistical Office. Data on Austrian population and on tourism (visitor numbers, nights spent) was retrieved from www.statistik.at . Age, sex, mechanism of injury, season and mortality was analysed for Austrian residents vs. visitors. RESULTS: Visitors contributed 3.9% to the total population and 9.2% of all TBI cases. Incidence of hospital admissions was 292/100,000/year in Austrian residents and was 727/100,000/year in visitors. Male:female ratio was 1.39:1 in Austrian residents and 1.55:1 in visitors. Austrian cases were older than visitors' cases (mean age 41 vs. 28 years). Austrian cases were distributed evenly over the seasons, while 75% of the visitors' cases happened during winter and spring. The most frequently observed causes of TBI in Austrian residents were private accidents, while sports caused almost half of the visitors' cases. Hospital mortality was lower in visitors than in Austrian residents (0.8 vs. 2.1%). CONCLUSION: Sports-related TBI of visitors causes a significant workload for Austrian hospitals. Better prevention is warranted.

Deaths due to traumatic brain injury in Austria between 1980 and 2012.

BACKGROUND: To investigate changes in TBI mortality in Austria during 1980-2012 and to identify causes for these changes. METHODS: Statistik Austria provided data (from death certificates) on all TBI deaths from January 1980-December 2012. Data included year/month of death, age, sex, residency of the cases and mechanism of accident. Data regarding the size of the age groups was obtained from Statistik Austria. Mortality rates (MR; deaths/10(5) population/year) were calculated for male vs. female patients and for different age groups. Changes in mechanisms of TBI were evaluated. RESULTS: The MR decreased from 28.1 to 11.8 deaths/10(5) population/year. Traffic-related TBI deaths decreased from 62% to 9%. This caused a significant decrease in TBI deaths in younger age groups. Fall-related TBI deaths (mostly geriatric cases) remained unchanged. Falls became the leading cause; its rate increased from 22% to 64% of all TBI deaths. Thus, the mean age of fatal TBI cases increased by 20 years and the rate of cases aged <60 years decreased from 71% to 28%. Another important cause was suicide by firearms; its rate increased from 10% to 23% of all TBI deaths. CONCLUSIONS: These findings warrant better prevention of falls in the elderly and of suicides.

Traumatic brain injuries caused by traffic accidents in five European countries: outcome and public health consequences.

BACKGROUND: Road traffic accidents (RTAs) have been identified by public health organizations as being of major global concern. Traumatic brain injuries (TBIs) are among the most severe injuries and are in a large part caused by RTA. The objective of this article is to analyse the severity and outcome of TBI caused by RTA in different types of road users in five European countries. METHODS: The demographic, severity and outcome measures of 683 individuals with RTA-related TBI from Austria, Slovakia, Bosnia, Croatia and Macedonia were analysed. Five types of road users (car drivers, car passengers, motorcyclists, bicyclists and pedestrians) were compared using univariate and multivariate statistical methods. Short-term outcome [intensive care unit (ICU) survival] and last available long-term outcome of patients were analysed. RESULTS: In our data set, 44% of TBI were traffic related. The median age of patients was 32.5 years, being the lowest (25 years) in car passengers. The most severe and extensive injuries were reported in pedestrians. Pedestrians had the lowest rate of ICU survival (60%) and favourable long-term outcome (46%). Drivers had the highest ICU survival (73%) and car passengers had the best long-term outcome (59% favourable). No differences in the outcome were found between countries with different economy levels. CONCLUSION: TBI are significantly associated with RTA and thus, tackling them together could be more effective. The population at highest risk of RTA-related TBI are young males (in our sample median age: 32.5 years). Pedestrians have the most severe TBI with the worst outcome. Both groups should be a priority for public health action.

Impact of concomitant injuries on outcomes after traumatic brain injury.

BACKGROUND: Patients with traumatic brain injury (TBI) frequently have concomitant injuries; we aimed to investigate their impact on outcomes. METHODS: Between February 2002 and April 2010, 17 Austrian centers prospectively enrolled 863 patients with moderate and severe TBI into observational studies. Data on accident, treatment, and outcomes were collected. Patients who survived until intensive care unit (ICU) admission and had survivable TBI were selected, and were assigned to "isolated TBI" or "TBI + injury" groups. Six-month outcomes were classified as "favorable" if Glasgow Outcome Scale (GOS) scores were five or four, and were classified as "unfavorable" if GOS scores were three or less. Univariate statistics (Fisher's exact test, t test, χ(2)-test) and logistic regression were used to identify factors associated with hospital mortality and unfavorable outcome. RESULTS: Of the 767 patients, 403 (52.5 %) had isolated TBI, 364 (47.5 %) had concomitant injuries. Patients with isolated TBI had higher mean age (53 vs. 44 years, P = 0.001); hospital mortality (30.0 vs. 27.2 %, P = 0.42) and rate of unfavorable outcome (50.4 vs. 41.8 %, P = 0.02) were higher, too. There were no significant mortality differences for factors like age groups, trauma mechanisms, neurologic status, CT findings, or treatment factors. Concomitant injuries were associated with higher mortality (33.3 vs. 12.5 %, P = 0.05) in patients with moderate TBI, and were significantly associated with more ventilation, ICU, and hospitals days. Logistic regression revealed that age, Glasgow Coma Scale score, pupillary reactivity, severity of TBI and CT score were the main factors that influenced outcomes. CONCLUSIONS: Concomitant injuries have a significant effect upon the mortality of patients with moderate TBI. They do not affect the mortality in patients with severe TBI.

Outcome after severe brain trauma associated with epidural hematoma.

OBJECTIVE: The aim of this study was to identify factors contributing to outcomes after severe traumatic brain injury (TBI) associated with epidural hematoma (EDH). METHODS: Between 02/2002 and 4/2010 17 Austrian centers prospectively enrolled 863 patients with moderate and severe TBI into observational studies. Data on accident, treatment, and outcomes were collected. Data sets from patients who had severe TBI (=Glasgow Coma Scale score <9) and EDH were selected. Six-month outcomes were classified as "favorable" if Glasgow Outcome Scale (GOS) scores were 5 or 4, and were classified as "unfavorable" if GOS scores were 3 or less. The Rotterdam score was used to classify computed tomography (CT) findings; the scores published by Hukkelhoven et al. (J Neurotrauma 22:1025-1039, 2005) were used to estimate predicted rates of death and of unfavorable outcomes. Univariate (Fisher's exact test, t test, Chi(2)-test) and multivariate (logistic regression) statistics were used to identify factors associated with hospital mortality and favorable outcome. RESULTS: Of the 738 patients with severe TBI 159 (21.5 %) had EDH. Of these, 49 (30.8 %) died in the hospital, 21 (13.2 %) survived with unfavorable outcome, 82 (51.6 %) with favorable outcome; long-term outcome was unknown in 7 survivors (4.4 %). Mortality rates predicted by the Rotterdam score showed good correlation with observed mortality rates. According to the Hukkelhoven scores, observed/predicted ratios for mortality and unfavorable outcome were 0.94 and 0.97, respectively. Age, severity of TBI, and neurological status were the main factors influencing outcomes after severe TBI associated with EDH. We were unable to demonstrate significant effects of treatment factors.

Effects of gender on outcomes after traumatic brain injury.

BACKGROUND: It has been reported that female gender may be an independent risk factor for poor outcome after traumatic brain injury (TBI). The goal of this study was to investigate gender differences in outcome after TBI. METHODS: Between February 2002 and April 2010, 17 Austrian centers prospectively enrolled 863 patients with moderate and severe TBI into observational studies. Data on crash, treatment, and outcomes were collected. Data sets from patients who had isolated TBI were selected. Six-month outcomes were classified as "favorable" if Glasgow Outcome Scale scores were 5 or 4 and were classified as "unfavorable" if Glasgow Outcome Scale scores were 3 or less. The Rotterdam score was used to classify computed tomography (CT) findings. Univariate statistics (Fisher's exact test, t test, χ2 test) and logistic regression were used to identify factors associated with hospital mortality and favorable outcome. RESULTS: There were 134 female and 305 male patients. Hospital mortality was 39.6% for females and 32.5% for males (p = 0.16). Rates of unfavorable outcome were 58.7% for females and 53.4% for males (p = 0.09). There were no significant mortality differences between females and males for factors such as age groups, trauma mechanisms, Glasgow Coma Scale scores, lesions on the CT scan, or treatment factors. Logistic regression revealed that gender had no significant influence on mortality of unfavorable outcome. The differences in outcome were due to the higher mean age of females (61.4 vs. 50.4, p < 0.001) and possibly because of small differences in Glasgow Coma Scale scores and in CT scores. CONCLUSIONS: Female gender is not an independent risk factor for in-hospital mortality after TBI.

Severity and outcome of traumatic brain injuries (TBI) with different causes of injury.

INTRODUCTION: Most epidemiological studies and reports have reached a consensus on the leading causes of traumatic brain injury (TBI). Despite the fact that the area of TBI is relatively well studied, reports on differences in severity and outcome of TBI with different causes are lacking. GOAL: This paper analyses the differences in severity and in short- and long-term outcome of TBIs with different causes. METHOD: This study analysed data on 1109 patients with severe TBI by dividing them into three injury-cause groups: 'traffic-related', 'falls' and 'other causes'. Severity and outcome was evaluated using chosen direct and indirect indicators. RESULTS: The most severe trauma occurred in the traffic-related group followed by falls and injuries with other causes. On the other hand, patients with traffic-related TBI had the best outcome. Age improves the outcome in the traffic-related group significantly. However, in the multivariate analysis after adjusting for age (and other important predictors including level of care) the odds for favourable long-term outcome stayed significantly higher in the traffic-related group. CONCLUSIONS: It is concluded that the causes of TBI should be considered by both clinicians and public health professionals as a lead in prognosis of outcome and policy planning.

Urine toxicology screening in Austrian trauma patients: a prospective study.

INTRODUCTION: The question as to whether the patient consumed drugs prior to the trauma and which drugs were consumed, is of prime importance for the anesthesia required during surgery. However, many patients are unwilling or unable (including those with multiple trauma or impaired consciousness, or unconscious patients) to answer this question. The purpose of our prospective multicenter study was to collect data about drug consumption in Austria to determine whether drugs are identifiable in the urine of recently injured individuals and to establish the types of drugs consumed. MATERIALS AND METHODS: This prospective study included severely and moderately injured patients admitted to the Lorenz Boehler Trauma Hospital (Vienna, Austria), the Trauma Hospital Linz (Linz, Austria) and the Department of Trauma Surgery of the General Hospital Horn (Horn, Austria) during an 18-month period (October 2003-March 2005). All patients were suffering from injuries urgently requiring surgery. Urine samples were gained from all patients immediately after admission. Urinary samples were tested by Immuno-Assay (Triage 8 Immuno-Assay, Biosite, San Diego, USA). Urine samples were screened simultaneously for opiates, methadone, cocaine, barbiturates, amphetamines, cannabinoids, benzodiazepines and tricyclic antidepressants. RESULTS: Our prospective study included a total of 664 patients (320 from Vienna, 193 from the city of Linz, and 151 from Horn). Six hundred and forty-two patients were moderately injured (ISS < 16), suffering mostly from injuries to the extremities (504 patients) and 22 patients were severely injured (ISS > 16). Of the 664 patients, 178 (26.8%) tested positive for one or more drugs. The drugs most commonly detected were benzodiazepines (111 patients, 16.7%), cannabinoides (39 patients, 6%), tricyclic antidepressants (28, 4.2%) and opiates (26, 3.9%). CONCLUSION: Drug use is widespread in patients presenting to urban trauma centers in Austria. Physicians should maintain a high index of suspicion that their patients may be intoxicated and should perform drug testing routinely.

Cholecystitis after trauma.

BACKGROUND: The goal of this project was to investigate incidence, risk factors, histologic findings, and mortality rate of posttraumatic cholecystitis requiring surgical treatment. METHODS: Retrospective analysis of all patients admitted to the intensive care unit of an urban trauma center between April 1998 and January 2005. Data from the hospital and intensive care documentation systems databases and patients' charts were reviewed. All patients with cholecystitis treated by cholecystectomy were selected for further study. Potential risk factors, diagnostic, and histologic findings were analyzed. RESULTS: Cholecystitis was a fairly frequent finding in critically ill trauma patients (67 of 2,625 patients, 2.6%). Almost 10% of the patients with severe multiple injuries developed cholecystitis. Histologic findings showed a wide variation; three main diagnoses were established: acute acalculous cholecystitis (n = 28), chronic acalculous cholecystitis (n = 25), and cholecystitis with cholecystolithiasis (n = 13). Patients with acute acalculous cholecystitis and chronic acalculous cholecystitis were significantly younger and had significantly higher injury severity scores than patients with either cholecystitis with cholecystolithiasis or without cholecystitis. Noninvasive diagnostic tools such as ultrasonographic signs and laboratory data did not correlate with histologic diagnosis. Well-timed cholecystectomy within 24 hours after clinical suspicion lead to a 4.4% mortality rate in this group of patients. CONCLUSION: Cholecystitis after trauma is not a uniform disease. Although trauma severity seems to play an important role in the development or exacerbation of acalculous cholecystitis or both, cholecystolithiasis may play a significant role in patients with moderate to minor trauma. Intensivists should be aware of this complication in critically ill trauma patients because it seems to occur more frequently than previously assumed. Diagnosis can only be made if clinical signs, laboratory data, and ultrasonographic findings are taken into consideration. If posttraumatic cholecystitis is treated in an early stage by cholecystectomy, mortality rate remains low.

Monitoring of intracranial pressure in patients with severe traumatic brain injury: an Austrian prospective multicenter study.

OBJECTIVE: The goals of this study were to elucidate reasons why patients did or did not receive intracranial pressure (ICP) monitoring and to describe factors influencing hospital mortality after severe traumatic brain injury (TBI). DESIGN: Prospective multicenter cohort study. PATIENTS AND PARTICIPANTS: 88,274 patients consecutively admitted to 32 medical, surgical and mixed Austrian ICUs between 1998 and 2004. INTERVENTIONS: None. MEASUREMENTS AND RESULTS: 1,856 patients (2.1% of all ICU admissions) exhibited severe TBI (GCS < 9); of these, 1,031 (56%) had ICP monitoring. The "worst" and the "best" cases were both less likely to receive ICP monitoring. Younger patients, female patients, and patients with isolated TBI were more likely to receive ICP monitoring. Compared with large centers ICP was monitored more frequently [odds ratio (OR) 3.09, CI 2.42-3.94] in medium-sized centers. The 20% of patients with the highest likelihood to receive ICP monitoring were monitored in 91% of cases, and had the lowest hospital mortality (31%, OR 0.78, CI 0.37-1.64). Multivariate analysis revealed that severity of illness, TBI severity, isolated TBI, and the number of cases treated per year were associated with hospital outcome. Compared with the large centers, ORs for hospital mortality were 1.85 (CI 1.42-2.40) for patients from medium-sized centers and 1.91 (CI 1.24-2.93) for patients from small centers. CONCLUSIONS: ICP monitoring may possibly have some beneficial effects, but this needs further evaluation. Patients with severe TBI should be admitted to experienced centers with high patient volumes since this might improve hospital mortality rates.

Epidemiology, treatment and outcome of patients after severe traumatic brain injury in European regions with different economic status.

BACKGROUND: We hypothesized that the economic status of a region might influence quality of care and outcome of patients with severe brain trauma. METHODS: Between January 2001 and December 2005, 13 centres enrolled patients with severe brain trauma. Data on accident, treatment and outcomes were collected prospectively. The regions were classified as 'high income' (Austria, five centres), 'upper middle income' (UMI) (Croatia, Slovakia, six centres) or 'lower middle income' (LMI) (Bosnia, Macedonia, two centres). Data on epidemiology, treatment and outcomes were compared according to this classification. Quality of care was assessed using a new scoring system. RESULTS: A total of 1172 data sets were analysed. Patients from the wealthier regions were significantly older. Low-level falls and traffic accidents contributed to more than two-third of all cases. Violence-related trauma was significantly more frequent in 'middle income' regions. Treatment quality was significantly different; treatment according to guidelines for brain trauma management was provided most frequently for patients from high-income regions. Compared with expected mortality rates, mortality was 6.5% lower in the 'high-income' centres, 2.4% lower in the 'UMI' centres and 13% higher in the 'LMI' centres. Advanced age, poor neurological status, high trauma severity and poor quality of care were associated with significantly lower odds for survival. CONCLUSIONS: The association between the economic status and outcome of brain trauma patients was due to the quality of care. Successful implementation of guidelines for brain trauma management requires a well-funded health care system.

Severe traumatic brain injury in Austria IV: intensive care management.

OBJECTIVES: The goal of this paper is to describe the ICU management of severe traumatic brain injury (TBI) in Austria. PATIENTS AND METHODS: Data sets from 415 patients included by 5 Austrian hospitals were available. The analysis focused on complications and outcomes of intensive care, monitoring of intracranial pressure (ICP), efficacy of interventions to control ICP, management of hemodynamics and cerebral perfusion pressure (CPP), ventilation, and effects of hyperglycaemia. RESULTS: Overall ICU mortality was 30.8%; 90-day mortality was 35.7%. Final outcome was favorable in 33%, unfavorable in 51%, and in 16% the final outcome was unknown. An ICP monitoring device was used in 64%; most patients received intraparenchymal sensors (77%). Events associated with mortality > 50% were CPP < 50 mm Hg for > 12 hours/day, ICP > 25 mm Hg for > 12 hours/day, and MAP < 70 mm Hg for > 18 hours/day. The use of ICP monitoring was associated with significantly reduced ICU mortality. Interventions that may have improved the outcome included the use of barbiturates (short-term), hypertonic saline, moderate hyperventilation (33 < pCO2 < 37; p < 0.001 vs. aggressive hyper-and normoventilation), and normothermia. Hyperglycaemia was associated with poor outcome. CONCLUSIONS: Our study showed that ICU management of patients with severe TBI mostly follows international guidelines, and that outcome was comparable to or even better than that reported by other authors. Low CPP was associated with poor outcome, and was more often due to low MAP than to elevated ICP. The use of barbiturates and hypertonic saline was more common than expected. CPP should be maintained > 50 mm Hg, the use of catecholamines, fluid loading, barbiturates (short-term), moderate hyperventilation, hypertonic saline, and insulin may improve outcome after severe TBI.

Severe traumatic brain injury in Austria I: introduction to the study.

OBJECTIVES: The goals of the Austrian Severe Traumatic Brain Injury Study were to investigate the current management of patients with severe traumatic brain injury in Austria and to assess the effects of introducing guidelines for the management of severe traumatic brain injury upon the outcome of these patients. The purpose of this paper is to give a detailed description of the goals, methods, and overall results of the study, and to provide an introduction to a series of papers where the results of the study will be presented and discussed. STUDY DESIGN: The study included patients with severe traumatic brain injury from five centers in Austria. Data on accident, pre-hospital treatment, hospital treatment, and patient status were collected prospectively. Patient data was entered daily for the first 10 days in hospital and then up to a year after discharge from intensive care. All data was entered into an internet-based database. The data was evaluated to describe epidemiology, pre-hospital treatment, medical management, and surgical management; the evaluation also assessed the effects of guideline-based management on traumatic brain injury patients. RESULTS: The data set comprises a total of 492 patient records from the 5 participating hospitals; this data was collected over a 3-year period. Data quality is considered good; the number of missing data items is low. ICU mortality was 31.6%. Final outcome: 23% of the patients had a good recovery, 10% had moderate disabilities, 8% had severe disabilities, 6% were persistent vegetative, and 38% died. Final outcome was unknown in 16% of patients. CONCLUSIONS: This study proved that an internet-based database may be a valuable tool for prospective multicenter studies if many variables have to be collected for a high number of patients. The results of our study provide enough evidence to initiate further research on many aspects of the management of traumatic brain injury patients.

Severe traumatic brain injury in Austria II: epidemiology of hospital admissions.

OBJECTIVES: The goal of this paper is to describe the hospital-based epidemiology of severe TBI in Austria. PATIENTS AND METHODS: Data sets from 492 patients included in the study by 5 Austrian hospitals were available. Age and gender distribution, education, occupation, location of trauma, mechanism of injury, alcohol use, type and severity of injury, associated injuries, length of intensive care unit stay, and intensive care unit outcome were evaluated for each of the 5 centers. RESULTS: The sample represents roughly 13% of all cases with severe TBI which were treated in Austrian hospitals during the study period. Mean age was 48 +/- 21 years, and most patients were male (72%). The most important trauma locations were roads (50%), home (24%), outdoors (10%), and workplace (7%). Transportrelated trauma was the most important mechanism (44%) followed by falls < 3 m (30%), falls > 3 m (11%), and sports injuries (5%). Detailed analysis of transport-related trauma showed that car accidents (45%) were most common, followed by pedestrian (20%), motorbike (19%), and bicycle (16%) accidents. Significant differences between the centers were found for most of the variables analyzed. The severe traumatic brain injury was associated with spinal cord injury in 10%, and with severe multiple trauma in 38% of cases. Intensive care mortality was 31.7%. There were no significant correlations between mechanisms of injury and severity of trauma, nor between mechanisms and ICU outcome. CONCLUSIONS: Epidemiology of severe traumatic brain injuries in Austria is not much different from other industrialized countries. Traffic accidents are responsible for the majority of traumas, stressing the importance of road injury prevention. Attention should also be paid to the specific risks of older people and to prevent injuries at home.

Severe traumatic brain injury in Austria III: prehospital status and treatment.

OBJECTIVES: The goal of this paper is to describe prehospital status and treatment of patients with severe TBI in Austria. PATIENTS AND METHODS: Data sets from 396 patients with severe TBI (Glasgow Coma Scale score < 9) included by 5 Austrian hospitals were available. The analysis focused on incidence and/or degree of severity of typical clinical signs, frequency of use of different management options, and association with outcomes for both. ICU mortality, 90-day mortality, final outcome (favorable = good recovery or moderate disability; unfavorable = severe disability, vegetative state, or death) after 6 or 12 months, and ratio of observed (90-day) to predicted mortality (O/E ratio) are reported for the selected parameters. Chi2 -test, t-test, Fisher's exact test, and logistic regression were used to identify significant (p < 0.05) differences for association with survival and favorable outcome (both coded as 1). RESULTS: The majority of patients were male (72%), mean age was 49 +/- 21 years, mean injury severity score (ISS) was 27 +/- 17, mean first GCS score was 5.6 +/- 2.9, and expected hospital survival was 63 +/- 30%. ICU mortality was 32%, 90-day mortality was 37%, and final outcome was favorable in 35%, unfavorable in 53%, unknown in 12%. We found that age > 60 years, ISS > 50 points, GCS score < 4, bilateral changes in pupil size and reactivity, respiratory rate < 10/min, systolic blood pressure (SBP) < 90 mm Hg, and heart rate < 60/min were associated with significantly higher ICU and 90-day mortality rates, and lower rates of favorable outcome. With regard to prognostic value the GCS motor response score is identical to the full GCS score. Administration of > 1000 ml of fluid and helicopter transport were associated with better outcomes than expected, while endotracheal intubation in the field had neither a positive nor a negative effect on outcomes. Administration of no or < 500 ml of fluids was associated with worse outcomes than expected. Outcomes were better than expected in the few patients (5%) who received hypertonic saline. CONCLUSIONS: Age, ISS, and initial neuro status are the factors most closely associated with outcome. Hypotension must be avoided. Fluids should be given to restore and/or maintain SBP > 110 mm Hg. Helicopter transport should be arranged for more seriously injured patients.

Severe traumatic brain injury in Austria V: CT findings and surgical management.

OBJECTIVES: The aim of this paper is to describe CT findings and surgical management of patients with severe traumatic brain injury (TBI) in Austria. PATIENTS AND METHODS: Data sets from 415 patients treated by 5 Austrian hospitals were available. The analysis focused on incidence, surgical management, and outcome of different types of intracranial lesions, and outcome of surgical interventions with and without monitoring of intracranial pressure (ICP). For the first analysis we assigned the patients to 16 groups based on the type of lesion as evaluated by CT scan. For the second analysis we created 4 groups based on surgical treatment (yes/no) and ICP monitoring (yes/no). RESULTS: The mean age was 48.9 years with a male to female ratio of 299:116. The most frequent single lesions were contusions (CONT) and diffuse brain edema. Combined lesions were far more common than single lesions; the most frequently observed combinations included CONT and subarachnoid hemorrhage (SAH) with or without subdural hematoma (SDH). Surgery was done in 276 (66.5%) patients. Osteoplastic surgery (OPS; n = 221) was the most common method followed by osteoclastic surgery (OCS; n = 91) and decompressive craniectomy (DEC; n = 15). ICU mortality was 29.7% for all patients who had any kind of surgery, which was lower than that of patients who were treated non-operatively (33.1%). The ICU mortality of patients with SDH was lower with OCS (18.8%) than with OPS (36.0%). Patients who received ICP monitoring but did not require surgery had the lowest 90 day mortality (17.5%). CONCLUSIONS: ICP monitoring seems to be beneficial in both operatively and non-operatively treated patients with severe TBI. Patients with SDH who were operated on had significantly better outcomes. In patients with SDH, their outcome after osteoclastic surgery was significantly better than after osteoplastic procedures.

Severe traumatic brain injury in Austria VI: effects of guideline-based management.

OBJECTIVES: The goal of this paper is to report relations between health outcomes and implementation of individual recommendations of the guidelines. PATIENTS AND METHODS: Data sets from 405 patients included by 5 Austrian hospitals were available. The analysis focused on the compliance of treatment modalities to TBI guidelines recommendations. Compliance was evaluated based on scores developed specifically for this purpose. To evaluate the relations between the TBI guidelines compliance and outcomes the estimation of odds ratios was computed using multiple as well as logistic regression with age, ISS and initial GCS used to control confounding. RESULTS: The option on prehospital resuscitation was followed in 84%, the guideline on early resuscitation was followed in 79%. The guideline on intracranial pressure treatment threshold was the most closely followed one (89%). The option on cerebral perfusion pressure was followed in less than 30% of patients. Only the scores on resuscitation of blood pressure and oxygenation and on cerebral perfusion pressure were positively and statistically significantly related to ICU survival. Positive relations were also found for adherence to the recommendations on the type of monitoring, hyperventilation (guideline), prophylactic use of anti-seizure drugs, and the total of scores. The other recommendations were negatively related to ICU survival, but computed odds ratios were statistically not significant. Analysis of relations between compliance scores and length of ICU and hospitals stay in survivors showed that adherence to the recommendations on type of monitoring was related to a reduction of length of stay in ICU and hospital, adherence to the hyperventilation guideline was related to shortened ICU, but increased hospital stay, and adherence to the guideline on mannitol was related to reduced days in hospital, but not to days in ICU. Implementing the standard on corticosteroid use was related to a reduction of days both in hospital and ICU. Using the standard on prophylactic use of anti-seizure drugs was related to a reduction in ICU days. If all the recommendations were closely followed an increase of days in ICU would be observed, while the length of stay in hospital would be reduced. CONCLUSIONS: The relatively strong relation between initial resuscitation in the hospital and ICU survival provides a firm basis for future efforts of emergency teams. The positive influence of some of the recommendations on reduction of ICU or hospital days may provide economic incentives to promote guidelines implementation.