Hospital and Intensive Care Unit Length of Stay for Injury Admissions: A Pan-Canadian Cohort Study.

OBJECTIVE: To assess the variation in hospital and intensive care unit (ICU) length of stay (LOS) for injury admissions across Canadian provinces and to evaluate the relative contribution of patient case mix and treatment-related factors (intensity of care, complications, and discharge delays) to explaining observed variations. BACKGROUND: Identifying unjustified interprovider variations in resource use and the determinants of such variations is an important step towards optimizing health care. METHODS: We conducted a multicenter, retrospective cohort study on admissions for major trauma (injury severity score >12) to level I and II trauma centers across Canada (2006-2012). We used data from the Canadian National Trauma Registry linked to hospital discharge data to compare risk-adjusted hospital and ICU LOS across provinces. RESULTS: Risk-adjusted hospital LOS was shortest in Ontario (10.0 days) and longest in Newfoundland and Labrador (16.1 days; P < 0.001). Risk-adjusted ICU LOS was shortest in Québec (4.4 days) and longest in Alberta (6.1 days; P < 0.001). Patient case-mix explained 32% and 8% of interhospital variations in hospital and ICU LOS, respectively, whereas treatment-related factors explained 63% and 22%. CONCLUSIONS: We observed significant variation in risk-adjusted hospital and ICU LOS across trauma systems in Canada. Provider ranks on hospital LOS were not related to those observed for ICU LOS. Treatment-related factors explained more interhospital variation in LOS than patient case-mix. Results suggest that interventions targeting reductions in low-value procedures, prevention of adverse events, and better discharge planning may be most effective for optimizing LOS for injury admissions.

Mortality in Canadian Trauma Systems: A Multicenter Cohort Study.

OBJECTIVE: To measure the variation in trauma center mortality across Canadian trauma systems, assess the contribution of traumatic brain injury and thoracoabdominal injury to observed variations, and evaluate whether the presence of recommended trauma system components is associated with mortality. SUMMARY BACKGROUND DATA: Injuries represent one of the leading causes of mortality, disability, and health care costs worldwide. Trauma systems have improved injury outcomes, but the impact of trauma system configuration on mortality is unknown. METHODS: We conducted a retrospective cohort study of adults admitted for major injury to trauma centers across Canada (2006-2012). Multilevel logistic regression was used to estimate risk-adjusted hospital mortality and assess the impact of 13 recommended trauma system components. RESULTS: Of 78,807 patients, 8382 (10.6%) died in hospital including 6516 (78%) after severe traumatic brain injury and 749 (9%) after severe thoracoabdominal injury. Risk-adjusted mortality varied from 7.0% to 14.2% across provinces (P < 0.0001); 11.1% to 26.0% for severe traumatic brain injury (P < 0.0001), and 4.7% to 5.9% for thoracoabdominal injury (P = 0.2). Mortality decreased with increasing number of recommended trauma system elements; adjusted odds ratio = 0.93 (0.87-0.99). CONCLUSIONS: We observed significant variation in trauma center mortality across Canadian provinces, specifically for severe traumatic brain injury. Provinces with more recommended trauma system components had better patient survival. Results suggest that trauma system configuration may be an important determinant of injury mortality. A better understanding of which system processes drive optimal outcomes is required to reduce the burden of injury worldwide.

Canadian benchmarks for acute injury care.

BACKGROUND: Acute care injury outcomes vary substantially across Canadian provinces and trauma centres. Our aim was to develop Canadian benchmarks to monitor mortality and hospital length of stay (LOS) for injury admissions. METHODS: Benchmarks were derived using data from the Canadian National Trauma Registry on patients with major trauma admitted to any level I or II trauma centre in Canada and from the following patient subgroups: isolated traumatic brain injury (TBI), isolated thoracoabdominal injury, multisystem blunt injury, age 65 years or older. We assessed predictive validity using measures of discrimination and calibration, and performed sensitivity analyses to assess the impact of replacing analytically complex methods (multiple imputation, shrinkage estimates and flexible modelling) with simple models that can be implemented locally. RESULTS: The mortality risk adjustment model had excellent discrimination and calibration (area under the receiver operating characteristic curve 0.886, Hosmer-Lemeshow 36). The LOS risk-adjustment model predicted 29% of the variation in LOS. Overall, observed:expected ratios of mortality and mean LOS generated by an analytically simple model correlated strongly with those generated by analytically complex models (r > 0.95, κ on outliers > 0.90). CONCLUSION: We propose Canadian benchmarks that can be used to monitor quality of care in Canadian trauma centres using Excel (see the appendices, available at canjsurg.ca). The program can be implemented using local trauma registries, providing that at least 100 patients are available for analysis.

CONTEXTE: L'issue des traitements dispensés dans les services de traumatologie d'urgence varie substantiellement d'une province canadienne et d'un centre de traumatologie à l'autre. Notre but était d'établir des valeurs de référence pour suivre la mortalité et la durée des séjours hospitaliers en traumatologie au Canada. MÉTHODES: Les paramètres ont été sélectionnés à partir des données du Registre national des traumatismes concernant les grands polytraumatisés admis dans tout centre de traumatologie de niveau I ou II au Canada et selon les catégories de patients suivantes : traumatisme crânien isolé (TCI), traumatisme thoraco-abdominal isolé, traumatisme plurisystémique fermé, âge de 65 ans ou plus. Nous avons évalué la validité prédictive à l'aide de critères discriminants et de paramètres d'étalonnage et nous avons procédé à des analyses de sensibilité pour évaluer l'impact du remplacement de méthodes analytiques complexes (imputation multiple, estimations par contraction des coefficients et modélisation flexible) par des modèles simples applicables à l'échelle locale. RÉSULTATS: Le modèle d'ajustement du risque de mortalité s'est révélé doté d'un pouvoir discriminant et d'un étalonnage excellents (aire sous la courbe de la fonction d'efficacité du récepteur [ROC] 0,886, test de Hosmer-Lemeshow 36). Le modèle d'ajustement du risque pour la durée du séjour hospitalier a permis de prédire 29 % de sa variation. De plus, les rapports observés:attendus pour la mortalité et la durée moyenne des séjours hospitaliers générés par un modèle analytique simple ont été en étroite corrélation avec les rapports générés par les modèles analytiques complexes (r > 0,95, κ pour valeurs aberrantes > 0,90). CONCLUSION: Nous proposons des valeurs de référence canadiennes qui peuvent être utilisées pour faire le suivi de la qualité des soins dans les centres de traumatologie canadiens à l'aide d'un simple programme Excel (voir les annexes, accessible à l'adresse canjsurg.ca). Le programme peut être appliqué à l'aide des données des registres de traumatologie locaux à la condition qu'au moins 100 patients y soient accessibles pour analyse.

No benefit to surgical fixation of flail chest injuries compared with modern comprehensive management: results of a retrospective cohort study.

BACKGROUND: Chest wall trauma is a common cause of morbidity and mortality. Recent technological advances and scientific publications have created a renewed interest in surgical fixation of flail chest. However, definitive data supporting surgical fixation are lacking, and its virtues have not been evaluated against modern, comprehensive management protocols. METHODS: Consecutive patients undergoing rib fracture fixation with rib-specific locking plates at 2 regional trauma centres between July 2010 and August 2012 were matched to historical controls with similar injury patterns and severity who were managed nonoperatively with modern, multidisciplinary protocols. We compared short- and long-term outcomes between these cohorts. RESULTS: Our patient cohorts were well matched for age, sex, injury severity scores and abbreviated injury scores. The nonoperatively managed group had significantly better outcomes than the surgical group in terms of ventilator days (3.1 v. 6.1, p = 0.012), length of stay in the intensive care unit (3.7 v. 7.4 d, p = 0.009), total hospital length of stay (16.0 v. 21.9 d, p = 0.044) and rates of pneumonia (22% v. 63%, p = 0.004). There were no significant differences in long-term outcomes, such as chest pain or dyspnea. CONCLUSION: Although considerable enthusiasm surrounds surgical fixation of flail chest injuries, our analysis does not immediately validate its universal implementation, but rather encourages the use of modern, multidisciplinary, nonoperative strategies. The role of rib fracture fixation in the modern era of chest wall trauma management should ultimately be defined by prospective, randomized trials.

CONTEXTE: Les traumatismes à la paroi thoracique sont une cause courante de morbidité et de mortalité. Dernièrement, des avancées technologiques et des articles scientifiques ont ravivé l'intérêt à l'égard du traitement chirurgical du volet costal. Les données fiables appuyant la fixation chirurgicale sont toutefois rares, et les avantages de cette technique n'ont pas été comparés à ceux de protocoles de prise en charge complets et modernes. MÉTHODES: Nous avons jumelé des patients consécutifs admis dans 2 centres régionaux de traumatologie entre juillet 2010 et août 2012 pour une fixation d'une fracture des côtes à l'aide de plaques verrouillées avec un groupe témoin rétrospectif présentant des blessures de type et de gravité semblables, toutefois pris en charge selon des protocoles multidisciplinaires modernes ne nécessitant aucune intervention chirurgicale. Nous avons ensuite comparé les issues à court et à long terme dans ces cohortes. RÉSULTATS: Les cohortes étaient bien appariées sur le plan de l'âge, du sexe et des indices de gravité des blessures. Les résultats des patients n'ayant pas subi d'intervention chirurgicale étaient significativement meilleurs que ceux de l'autre groupe en ce qui concerne le nombre de jours sous ventilation assistée (3,1 c. 6,1; p = 0,012), la durée du séjour aux soins intensifs (3,7 c. 7,4 jours; p = 0,009), la durée totale du séjour à l'hôpital (16,0 c. 21,9 jours; p = 0,044) et le taux de pneumonie (22 % c. 63 %; p = 0,004). Aucune différence significative n'a été observée en ce qui concerne les répercussions à long terme telles que les douleurs thoraciques ou la dyspnée. CONCLUSION: Si la fixation chirurgicale des blessures au volet costal suscite un grand enthousiasme, les résultats de notre analyse n'appuient pas le recours systématique à cette intervention, mais encouragent plutôt l'utilisation de stratégies modernes multidisciplinaires sans intervention chirurgicale. En conclusion, le rôle de la fixation des fractures des côtes dans la prise en charge moderne des traumatismes à la paroi thoracique devrait être défini dans le cadre d'études prospectives randomisées.

Validation of Complications Selected by Consensus to Evaluate the Acute Phase of Adult Trauma Care: A Multicenter Cohort Study.

OBJECTIVE: Evaluate the predictive validity of complications derived using expert consensus methodology to monitor the quality of trauma care. Secondary objectives were to assess the predictive validity of complications not selected by consensus and identify determinants of complications. BACKGROUND: A list of complications to monitor the quality of trauma care has recently been derived using Delphi consensus methodology. However, the predictive validity of consensus complications has not yet been demonstrated. METHODS: We conducted a multicenter cohort study of adults admitted to the 57 adult trauma centers of a Canadian integrated trauma system (2007-2012; n = 84,216). Multiple generalized linear models were used to assess the influence of complications on mortality and acute care length of stay (LOS) and to identify determinants of consensus complications. RESULTS: The presence of at least 1 consensus complication was associated with a 2.7-fold [95% confidence interval (CI): 2.45-2.90] and 2.2-fold (95% CI: 2.11-2.19) increase in the odds of mortality and mean LOS, respectively. Nonselected complications were associated with no increase in mortality (odds ratio = 0.90, 95% CI: 0.80-1.01) and a 60% increase in LOS (geometric mean ratio = 1.60, 95% CI: 1.57-1.62). Patient-related factors and factors related to treatment explained 66% and 34% of the variation in complication rates, respectively. CONCLUSIONS: In addition to the face and content validity ensured by consensus methodology, this study suggests that consensus complications have good predictive validity. Monitoring these complications as part of quality improvement activities would provide an opportunity to improve outcome and resource use for injury admissions.

Classifying outcomes of care for injured patients.

Many trauma survivors face challenges of impaired functioning, limited activities and reduced participation. Recovery from injury after acute care, therefore, becomes an important public health issue. This commentary discusses a framework for evaluating outcomes of acute care.

Improved disinfection performance for 280 nm LEDs over 254 nm low-pressure UV lamps in community wastewater.

Ultraviolet (UV) disinfection has been incorporated into both drinking water and wastewater treatment processes for several decades; however, it comes with negative environmental consequences such as high energy demands and the use of mercury. Understanding how to scale and build climate responsive technologies is key in fulfilling the intersection of UN Sustainable Development Goals 6 and 13. One technology that addresses the drawbacks of conventional wastewater UV disinfection systems, while providing a climate responsive solution, is UV light emitting diodes (LEDs). The objective of this study was to compare performance of bench-scale 280 nm UV LEDs to bench-scale low pressure (LP) lamps and full-scale UV treated wastewater samples. Results from the study demonstrated that the UV LED system provides a robust treatment that outperformed LP systems at the bench-scale. A comparison of relative energy consumptions of the UV LED system at 20 mJ cm-2 and LP system at 30 and 40 mJ cm-2 was completed. Based on current projections for wall plug efficiencies (WPE) of UV LED it is expected that the energy consumption of LED reactors will be on par or lower compared to the LP systems by 2025. This study determined that, at a WPE of 20%, the equivalent UV LED system would lead to a 24.6% and 43.4% reduction in power consumption for the 30 and 40 mJ cm-2 scenarios, respectively.

Does direct transport to provincial burn centres improve outcomes? A spatial epidemiology of severe burn injury in British Columbia, 2001-2006.

BACKGROUND: In Canada and the United States, research has shown that injured patients initially treated at smaller emergency departments before transfer to larger regional facilities are more likely to require longer stays in hospital or suffer greater mortality. It remains unknown whether transport status is an independent predictor of adverse health events among persons requiring care from provincial burn centres. METHODS: We obtained case records from the British Columbia Trauma Registry for adult patients (age ≥ 18 yr) referred or transported directly to the Vancouver General Hospital and Royal Jubilee Hospital burn centres between Jan. 1, 2001, and Mar. 31, 2006. Prehospital and in-transit deaths and deaths in other facilities were identified using the provincial Coroner Service database. Place of injury was identified through data linkage with census records. We performed bivariate analysis for continuous and discrete variables. Relative risk (RR) of prehospital and in-hospital mortality and hospital stay by transport status were analyzed using a Poisson regression model. RESULTS: After controlling for patient and injury characteristics, indirect referral did not influence RR of in-facility death (RR 1.32, 95% confidence interval [CI] 0.54- 3.22) or hospital stay (RR 0.96, 95% CI 0.65-1.42). Rural populations experienced an increased risk of total mortality (RR 1.22, 95% CI 1.00-1.48). CONCLUSION: Transfer status is not a significant indicator of RR of death or hospital stay among patients who received care at primary care facilities before transport to regional burn centres. However, significant differences in prehospital mortality show that improvements in rural mortality can still be made.

Cholecystokinin-cholescintigraphy in adults: consensus recommendations of an interdisciplinary panel.

BACKGROUND & AIMS: Cholecystokinin-cholescintigraphy (CCK-CS) provides a physiologic, noninvasive, and quantitative method for assessing gallbladder contraction and calculation of a gallbladder ejection fraction (GBEF). At present, it is used most commonly to identify patients with suspected functional gallbladder disorder. However, the methodology of CCK infusion and normal values differ markedly among imaging centers. METHODS: This document represents the consensus opinion of an interdisciplinary panel that gathered to assess the current optimal method for performing CCK-CS in adults, potential uses and limitations of CCK-CS, and questions that require further investigation. RESULTS: The panel recommended the use of a single, standardized, recently described CCK-CS protocol that involves infusion of 0.02 µg/kg of sincalide over 60 minutes with a normal gallbladder ejection fraction defined as ≥38%. The panel emphasized the need for a large, multicenter, prospective clinical trial to establish the utility of CCK-CS in the diagnosis of functional gallbladder disease. Although not without controversy regarding its clinical utility, the primary indication for CCK-CS at present is the well-selected patient with suspected functional gallbladder disorder. CONCLUSIONS: Agreement was reached that the adoption of this standardized protocol is critical to improve how CCK-CS is used to direct patient care and will represent an improvement over the diverse methods currently in use by eliminating the current lack of uniformity and adding both reliability and credibility to the results.

A predeployment trauma team training course creates confidence in teamwork and clinical skills: a post-Afghanistan deployment validation study of Canadian Forces healthcare personnel.

BACKGROUND: The 10-day Intensive Trauma Team Training Course (ITTTC) was developed by the Canadian Forces (CFs) to teach teamwork and clinical trauma skills to military healthcare personnel before deploying to Afghanistan. This article attempts to validate the impact of the ITTTC by surveying participants postdeployment. METHODS: A survey consisting of Likert-type multiple-choice questions was created and sent to all previous ITTTC participants. The survey asked respondents to rate their confidence in applying teamwork skills and clinical skills learned in the ITTTC. It explored the relevancy of objectives and participants' prior familiarity with the objectives. The impact of different training modalities was also surveyed. RESULTS: The survey showed that on average 84.29% of participants were "confident" or "very confident" in applying teamwork skills to their subsequent clinical experience and 52.10% were "confident" or "very confident" in applying clinical knowledge and skills. On average 43.74% of participants were "familiar" or "very familiar" with the clinical topics before the course, indicating the importance of training these skills. Participants found that clinical shadowing was significantly less valuable in training clinical skills than either animal laboratory experience or experience in human patient simulators; 68.57% respondents thought that ITTTC was "important" or "very important" in their training. CONCLUSIONS: The ITTTC created lasting self-reported confidence in CFs healthcare personnel surveyed upon return from Afghanistan. This validates the importance of the course for the training of CFs healthcare personnel and supports the value of team training in other areas of trauma and medicine.

Recurrent ectopic pancreatitis of the jejunum and mesentery over a 30-year period.

BACKGROUND: Ectopic pancreas is defined as pancreatic tissue found outside its usual anatomical position, with no ductal or vascular communication with the native pancreas. We describe a case of ectopic pancreas of the small bowel and mesentery causing recurrent episodes of pancreatitis, initially suspected on computed tomography (CT) and magnetic resonance cholangiopancreatography (MRCP), and confirmed on histological review of the resection. METHODS: A 67-year-old woman presented with clinical symptoms and biochemical evidence of pancreatitis. She had similar episodes over the past 30 years with unrevealing investigations, and was concluded to have idiopathic pancreatitis. She underwent CT and MRCP, with findings suggestive of ectopic pancreas, a diagnosis confirmed on histology of the resection. RESULTS: MRCP identified a mass in the proximal small bowel mesentery isointense to the native pancreas, with a small duct draining into a proximal jejunal loop. The resected specimen consisted of normal parenchyma with lobulated acinar tissue with scattered islets of Langerhans, an occasional ductular structure, and admixed areas of adipose tissue. The patient remained asymptomatic with normal biochemistry six months post-operatively. CONCLUSION: In an individual with abdominal pain, elevated serum amylase/lipase, but imaging findings of a normal native pancreas, ectopic pancreatitis should be considered, and can be evaluated by CT and MRCP.

Reading and Study Habits of Medical Students on Clerkships and Performance Outcomes: a Multi-institutional Study.

PURPOSE: To describe medical students' reading habits and resources used during clinical clerkships, and to assess whether these are associated with performance outcomes. METHOD: Authors administered a cross-sectional survey to medical students at 3 schools midway through the clerkship year. Closed and open-ended questions focused on resources used to read and learn during the most recent clerkship, time spent and purpose for using these resources, influencers on study habits, and barriers. A multiple regression model was used to predict performance outcomes. RESULTS: Overall response rate was 53% (158/293). Students spent most of their time studying for clerkship exams and rated question banks and board review books as most useful for exam preparation. Sixty-seven percent used textbooks (including pocket-size). For patient care, online databases and pocket-sized textbooks were rated most useful. The main barrier to reading was time. Eighty percent of students ranked classmates/senior students as most influential regarding recommended resources. Hours spent reading for exams was the only significant predictor of USMLE Step 2 scores related to study habits. The predominant advice offered to future students was to read. CONCLUSIONS: These findings can help inform students and educational leadership about resources students use, how they use them, and links to performance outcomes, in an effort to guide them on maximizing learning on busy clerkships. With peers being most influential, it is important not only to provide time to help students build strong reading and study habits early, but also to guide them towards reliable resources, so they will recommend useful information to others.

A population-based analysis of injury-related deaths and access to trauma care in rural-remote Northwest British Columbia.

BACKGROUND: Injury rates and injury mortality rates are generally higher in rural and remote communities compared with urban jurisdictions as has been shown to be the case in the rural-remote area of Northwest (NW) British Columbia (BC). The purpose of study was to identify: (1) the place and timing of death following injury in NW BC, (2) access to and quality of local trauma services, and (3) opportunities to improve trauma outcomes. METHODS: Quantitative data from demographic and geographic databases, the BC Trauma Registry, Hospital discharge abstract database, and the BC Coroner's Office, along with qualitative data from chart reviews of selected major trauma cases, and interviews with front-line trauma care providers were collated and analyzed for patients sustaining injury in NW BC from April 2001 to March 2006. RESULTS: The majority of trauma deaths (82%) in NW BC occur prehospital. Patients arriving alive to NW hospitals have low hospital mortality (1.0%), and patients transferring from NW BC to tertiary centers have better outcomes than matched patients achieving direct entry into the tertiary center by way of geographic proximity. Access to local trauma services was compromised by: incident discovery, limited phone service (land lines/cell), incomplete 911 emergency medical services system access, geographical and climate challenges compounded by limited transportation options, airport capabilities and paramedic training level, dysfunctional hospital no-refusal policies, lack of a hospital destination policies, and lack of system leadership and coordination. CONCLUSION: Improving trauma outcomes in this rural-remote jurisdiction requires a systems approach to address root causes of delays in access to care, focusing on improved access to emergency medical services, hospital bypass and destination protocols, improved transportation options, advanced life support transfer capability, and designated, coordinated local trauma services.

Access to trauma systems in Canada.

BACKGROUND: Trauma is a leading cause of morbidity, potential years of life lost and health care expenditure in Canada and around the world. Trauma systems have been established across North America to provide comprehensive injury care and to lead injury control efforts. We sought to describe the current status of trauma systems in Canada and Canadians' access to acute, multidisciplinary trauma care. METHODS: A national survey was used to identify the locations and capabilities of adult trauma centers across Canada and to identify the catchment populations they serve. Geographic information science methods were used to map the locations of Level I and Level II trauma centers and to define 1-hour road travel times around each trauma center. Data from the 2006 Canadian Census were used to estimate populations within and outside 1-hour access to definitive trauma care. RESULTS: In Canada, 32 Level I and Level II trauma centers provide definitive trauma care and coordinate the efforts of their surrounding trauma systems. Most Canadians (77.5%) reside within 1-hour road travel catchments of Level I or Level II centers. However, marked geographic disparities in access persist. Of the 22.5% of Canadians who live more than an hour away from a Level I or Level II trauma centers, all are in rural and remote regions. DISCUSSION: Access to high quality acute trauma care is well established across parts of Canada but a clear urban/rural divide persists. Regional efforts to improve short- and long-term outcomes after severe trauma should focus on the optimization of access to pre-hospital care and acute trauma care in rural communities using locally relevant strategies or novel care delivery options.

Attending rounds and bedside case presentations: medical student and medicine resident experiences and attitudes.

BACKGROUND: Attending rounds have transitioned away from the patient's bedside toward the hallway and conference rooms. This transition has brought into question how to best teach on medicine services. PURPOSE: The purpose is to describe learner experiences and attitudes regarding bedside attending rounds at an academic medical institution. METHOD: Cross-sectional Web-based survey of 102 medical students and 51 internal medicine residents (75% response rate). RESULTS: The mean time spent at the bedside during attending rounds was 27.7% (SD = 20.1%). During 73% of the rotations, case presentations occurred at the bedside 25% of the time or less. Learners experiencing bedside case presentations were more likely to prefer bedside case presentations. Despite their stated concerns, learners believe bedside rounds are important for learning core clinical skills. CONCLUSIONS: Time spent at the bedside is waning despite learners' beliefs that bedside learning is important for professional development. Our findings suggest the necessity to re-examine our current teaching methods on internal medicine services.

A model for identifying and ranking need for trauma service in nonmetropolitan regions based on injury risk and access to services.

BACKGROUND: Timely access to definitive trauma care has been shown to improve survival rates after severe injury. Unfortunately, despite development of sophisticated trauma systems, prompt, definitive trauma care remains unavailable to over 50 million North Americans, particularly in rural areas. Measures to quantify social and geographic isolation may provide important insights for the development of health policy aimed at reducing the burden of injury and improving access to trauma care in presently under serviced populations. METHODS: Indices of social deprivation based on census data, and spatial analyses of access to trauma centers based on street network files were combined into a single index, the Population Isolation Vulnerability Amplifier (PIVA) to characterize vulnerability to trauma in socioeconomically and geographically diverse rural and urban communities across British Columbia. Regions with a sufficient core population that are more than one hour travel time from existing services were ranked based on their level of socioeconomic vulnerability. RESULTS: Ten regions throughout the province were identified as most in need of trauma services based on population, isolation and vulnerability. Likewise, 10 communities were classified as some of the least isolated areas and were simultaneously classified as least vulnerable populations in province. The model was verified using trauma services utilization data from the British Columbia Trauma Registry. These data indicate that including vulnerability in the model provided superior results to running the model based only on population and road travel time. CONCLUSIONS: Using the PIVA model we have shown that across Census Urban Areas there are wide variations in population dependence on and distances to accredited tertiary/district trauma centers throughout British Columbia. Many of the factors that influence access to definitive trauma care can be combined into a single quantifiable model that researchers in the health sector can use to predict where to place new services. The model can also be used to locate optimal locations for any basket of health services.

The spatial epidemiology of trauma: the potential of geographic information science to organize data and reveal patterns of injury and services.

Despite important advances in the prevention and treatment of trauma, preventable injuries continue to impact the lives of millions of people. Motor vehicle collisions and violence claim close to 3 million lives each year worldwide. Public health agencies have promoted the need for systematic and ongoing surveillance as a foundation for successful injury control. Surveillance has been used to quantify the incidence of injury for the prioritization of further research, monitor trends over time, identify new injury patterns, and plan and evaluate prevention and intervention efforts. Advances in capability to handle spatial data and substantial increases in computing power have positioned geographic information science (GIS) as a potentially important tool for health surveillance and the spatial organization of health care, and for informing prevention and acute care interventions. Two themes emerge in the trauma literature with respect to GIS theory and techniques: identifying determinants associated with the risk of trauma to guide injury prevention efforts and evaluating the spatial organization and accessibility of acute trauma care systems. We review the current literature on trauma and GIS research and provide examples of the importance of accounting for spatial scale when using spatial analysis for surveillance. The examples illustrate the effect of scale on incident analysis, the geographic variation of major injury across British Columbia's health service delivery areas (HSDAs) and the rates of variation of injury within individual HSDAs.

The demographics of significant firearm injury in Canadian trauma centres and the associated predictors of inhospital mortality.

OBJECTIVE: Our primary objective was to evaluate demographic and causal factors of inhospital mortality for significant firearm-related injuries (i.e., those with an Injury Severity Score [ISS] > 12) in Canadian trauma centres. METHODS: We analyzed data submitted to the Canadian Institute for Health Information (CIHI) in the National Trauma Registry for all firearm-injured patients for fiscal years 1999-2003. Univariate and bivariate adjusting for ISS and multivariate logistic regression were performed. RESULTS: Men accounted for 94% of the 784 injured. In all patients, the percentages of self-inflicted, intentional, unintentional and unknown injuries were 27.8%, 60.3%, 6.1% and 5.7%, respectively. The inhospital fatality rate was 39.8%, with 83% of fatalities occurring on the first day. Two-thirds of patients were discharged home. Univariate and adjusted analysis found that ISS, first systolic blood pressure (BP), first systolic BP under 100, first Glasgow Coma Scale (GCS) score, age over 45 years, self-inflicted injury, intentional injury and injury at home significantly worsened the odds ratio of death in hospital and that police shooting was relatively beneficial. BP under 100, age over 45 years and a low GCS score had an adjusted odds ratio of death of 4.12, 1.99 and 0.64 per point increase, respectively. The multivariate model showed that ISS, BP under 100, first GCS score, sex and self-inflicted injury were significant in predicting inhospital death. CONCLUSION: A predominance of young men are injured intentionally with handguns in Canada, whereas older patients suffer self-inflicted injuries with long guns. The significant number of firearm deaths, largely in the first day, highlights the importance of preventative strategies and the need for rapid transport of patients to trauma centres for urgent care.

Trends in Injury Outcomes Across Canadian Trauma Systems.

Importance: In response to the burden of injury, the structure of injury care has changed considerably across Canada in the past decade. However, little is known about how patient outcomes have evolved. Objective: To evaluate trends in mortality, hospital length of stay, and unplanned readmission in Canadian trauma systems between 2006 and 2012. Design, Setting, and Participants: A pan-Canadian retrospective cohort study was conducted among adults admitted for major injury to a Canadian level I or II trauma center between April 1, 2006, and March 31, 2012. Data analysis was conducted from April 15 to December 3, 2015. Exposures: Trauma centers and systems. Main Outcomes and Measures: Multilevel generalized linear models were used to evaluate trends in the risk-adjusted incidence of mortality and readmission and risk-adjusted mean length of stay. Trend analyses were conducted globally and by province. Results: Among 78 807 patients (mean [SD] age, 50.7 [22.0] years; 22 540 women and 56 267 men) admitted for major injury during the study period, risk-adjusted mortality decreased from 12.1% (95% CI, 9%-16.1%) to 9.9% (95% CI, 7.4%-13.3%; P < .001) and mean length of hospital stay decreased from 11.6 (95% CI, 9.9-13.6) to 10.6 (95% CI, 9.1-12.5) days (P < .001). Statistically significant reductions in mortality were observed for Ontario (12% [95% CI, 10.7%-13.6%] to 8% [95% CI, 6.9%-9.2%]; P < .001), Alberta (12% [95% CI, 10%-14.3%] to 9.1% [95% CI, 7.7%-10.8%]; P = .02), and Manitoba (13% [95% CI, 9.1%-18.4%] to 11.1% [95% CI, 8.3%-14.7%]; P = .04). Risk-adjusted hospital stay decreased significantly in Québec (11.6 [95% CI, 11.1-12] to 9.1 [95% CI, 8.9-9.5] days; P < .001), British Columbia (12.5 [95% CI, 12-13.1] to 11.4 [10.9-11.9] days; P < .001), and Ontario (10.1 [95% CI, 9.8-10.4] to 9.8 [95% CI, 9.5-10.1] days; P < .001). No change in the incidence of readmission was observed. Conclusions and Relevance: We observed an 18.2% relative decrease in risk-adjusted mortality in Canadian trauma centers during the study period, representing 248 additional lives saved in 2012 vs 2006. Risk-adjusted mean hospital stay decreased by 8.6%, representing nearly 10 000 hospital days saved. A better understanding of the structures and processes behind observed improvements is needed to further reduce the burden of injury in Canada.

Population-based analysis of severe injuries from nonmotorized wheeled vehicles.

BACKGROUND: Bicycling, skateboarding, and inline skating are popular recreational activities, with the potential of causing severe injury. METHODS: A retrospective, population-based, trauma registry analysis of severe injuries and deaths from nonmotorized wheeled vehicles (NMWV) over a 10-year period was performed. RESULTS: During the study period, 1475 cyclists, 141 skateboarders, and 112 inline skaters sustained injury meeting registry criteria (length of stay > or = 3 days or death). The majority were male. Lone crashes were the most common mechanism of injury, although collisions with motor vehicles accounted for 63.6% (n = 44) of observed deaths. Thoracic trauma and head injuries were more common in nonsurvivors. CONCLUSION: NMWV injuries pose a public health concern. We recommend enforcement of mandatory helmet laws and expansion of the existing law to include skateboarders and inline skaters. Education initiatives should also be expanded to include the adult population. NMWV should be separated from motorized vehicles as much as possible.