Trends In Case Fatality Research Articles

Impact of a myocardial infarction emergency management network on population 28-day myocardial infarction case-fatality trends 2008-2019

Impact of a myocardial infarction emergency management network on population 28-day myocardial infarction case-fatality trends 2008-2019

Abstract 4844: Epidemiology of bone and soft-tissue sarcomas: A two-decade analysis of the surveillance, epidemiology, and end results program

Abstract In the United States, ~15000 cases of bone and soft-tissue sarcomas are diagnosed annually, representing roughly 1% of all incident cancers. While several studies have analyzed independent predictors of outcomes for these sarcomas, small samples and confounding bias have limited their ability to establish reliable conclusions. The present analysis provides a comprehensive epidemiological description of patients with any of 16 distinct bone and soft-tissue sarcomas by querying the Surveillance, Epidemiology, and End Results database between 2000 and 2020. Incidence, prevalence, incidence-based mortality, survival rates, and case-fatality ratios were computed. Using patient age, sex, race, and ethnicity, as well as tumor size, grade, and stage as covariates, multivariable survival Cox proportional hazards regression analyses were performed to model hazard ratios (HRs) and identify independent predictors of worse prognosis. Only patients with myosarcoma and fibrous histiocytoma witnessed a decrease in the prevalence of their disease over time (both, p<0.05). The incidence of chondrosarcoma and synovial sarcoma increased in White and Asian patients but decreased in Black individuals (both, p<0.001), while their case-fatality rates remained constant and increased, respectively, regardless of race and ethnicity (all, p<0.05). Case-fatality rates only declined significantly for White and Non-Hispanic patients with solitary fibrous tumor (both, p<0.05). Aside from alveolar soft-part sarcoma and clear cell sarcoma, a 10-year increase in age of patients with bone and soft-tissue sarcomas resulted in 18% to 61% higher likelihood of death (all, p<0.05). For most malignancies, having a tumor size greater than 5 cm yielded a 37% to 189% higher likelihood of death. While incidence trends suggest improvements in diagnostic techniques and early tumor detection, survival and case-fatality trends indicate potential for advancement in treatment for most bone and soft-tissue sarcomas. Citation Format: Marc El Beaino, Rachel Baum, Katherine M. Connors, Karim Masrouha, Santiago A. Lozano-Calderon, Patrick P. Lin. Epidemiology of bone and soft-tissue sarcomas: A two-decade analysis of the surveillance, epidemiology, and end results program [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2024; Part 1 (Regular Abstracts); 2024 Apr 5-10; San Diego, CA. Philadelphia (PA): AACR; Cancer Res 2024;84(6_Suppl):Abstract nr 4844.

Análisis de la incidencia y la letalidad del infarto agudo de miocardio en la provincia de Girona durante las tres últimas décadas

Introduction and objectivesMyocardial infarction (MI) incidence and case fatality trends are highly informative but relatively untested at the population level. The objective of this work was to estimate MI incidence and case fatality in the Girona population aged 35-74 years, and to determine their 30-year trends (1990-2019). MethodsThe REGICOR (Girona Heart Registry) monitored MI incidence and case fatality rates from 1990 to 2008. For the period 2008 to 2019, we linked discharges from Girona hospitals (n=4 974 977) and mortality registry (n=70 405) during this period. Our linkage algorithm selected key MI diagnostic codes and removed duplicates. Estimates from the linkage algorithm and the REGICOR registry were compared using chi-square tests for overlapping years (2008-2009). We estimated the annual percent change (APC) of standardized MI incidence and 28-day case fatality, and analyzed their trends using joinpoint regression. ResultsMI incidence and case fatality estimates were similar in the linkage algorithm and the REGICOR registry. We observed significant decreasing trends in the incidence of MI. The trend was APC, -0.96% (95% confidence interval (95%CI), –1.4 to –0.53) in women from 1990 to 2019 and –4.2% (95%CI, –5.5 to –3.0) in men from 1994 to 2019. The largest decrease in case fatality was –3.8% (95%CI, -5.1 to –2.5) from 1995 to 2003 in women and –2.4% (95%CI, –2.9 to –1.9) from 1995 to 2004 in men, mainly due to prehospital case fatality declines: -1.8% (95%CI, –2.6 to –1.1) in men and –3.2% (95%CI, –4.6 to –1.8) in women. ConclusionsIn Girona, MI incidence and case fatality decreased between 1990 and 2019. The incidence showed a slow but continuous decrease while case fatality only stabilized in the last decade, particularly in women.

Amniotic fluid embolism: 20-year incidence and case-fatality trends in the United States

ObjectiveTo estimate incidence and case-fatality rates of amniotic fluid embolism (AFE) and to examine their temporal trends. Study designPopulation-based retrospective cohort study using the 2000–2019 Health Care Cost and Utilization Project, Nationwide Inpatient Sample (HCUP-NIS). Annual population rates were estimated using HCUP-NIS specific weighting. Descriptive analyses and logistic regression described trends within the cohort. ResultsOver the study period, AFE incidence rate remained stable (mean 4.9 cases/100,000 deliveries) and the case-fatality rate declined (mean 17.7 %,95 % CI 16.40–10.09). Highest AFE incidence rates and fatality rates were in women ≥ 35 years, African-Americans, and in urban-teaching hospitals. AFE mortality rates decreased among Hispanics. ConclusionAFE rates remained stable and fatality rates declined over time. Highest rates of AFE occurrence and death were in women who typically have greater risk of experiencing adverse obstetrical outcomes. Continued research into early diagnostic methods and effective treatments are needed to further improve AFE incidence and mortality rates.

Public Health Prevention Recommendations & Pediatric Surgery Trauma Case Fatality Trends by Gender and Age among Pediatric Patients-≤1-9 years old in the United States, 2012-2016

Background Due to the lack of studies examining trauma-related injury and fatality trends and their implications on pediatric populations, this study aimed to address the gap in research and to identify the magnitude and the impact of unintentional injuries by exploring trends in trauma case fatalities among children in the United States from 2012 to 2016. Methods The study uses data from the National Trauma Data Bank (NTDB), which is an online database with data collected from trauma hospitals within the United States. Joinpoint regression models were used to calculate Annual Percentage Change (APC) and Average Annual Percentage Change (AAPC) as an indicator of trends. Results The highest upward trends occurred in males with an average annual increase of 15.1% (AAPC, 15.1%, 95% CI, 7.1% to 26.5%), 6-year-olds with an average annual increase of 36.3% (AAPC, 36.3%, 95% CI, 18.5% to 83.0%), and 9-year-olds with an average annual increase of 36.4% (AAPC, 36.4%, 95% CI, 19.8% to 72.5%). Males (59.5%) and children ≤1 years old (20.9%) had higher percentages of trauma case fatalities. Discussion This study identified an overall increase in trauma-related fatalities in all ages and genders. However, the trends did vary. Based on the findings, there needs to be more effort towards improving access to care, EMS response times, and socioeconomic factors attributing to poor supervision of children in families. Conclusion By addressing these issues, children in the United States will have improved physical and mental health outcomes. It would also reduce trauma case fatality trends in children.

Analysis of myocardial infarction incidence and case-fatality in the last three decades in the province of Girona

Introduction and objectivesMyocardial infarction (MI) incidence and case fatality trends are highly informative but relatively untested at the population level. The objective of this work was to estimate MI incidence and case fatality in the Girona population aged 35-74 years, and to determine their 30-year trends (1990-2019). MethodsThe REGICOR (Girona Heart Registry) monitored MI incidence and case fatality rates from 1990 to 2008. For the period 2008 to 2019, we linked discharges from Girona hospitals (n=4 974 977) and mortality registry (n=70 405) during this period. Our linkage algorithm selected key MI diagnostic codes and removed duplicates. Estimates from the linkage algorithm and the REGICOR registry were compared using chi-square tests for overlapping years (2008-2009). We estimated the annual percent change (APC) of standardized MI incidence and 28-day case fatality, and analyzed their trends using joinpoint regression. ResultsMI incidence and case fatality estimates were similar in the linkage algorithm and the REGICOR registry. We observed significant decreasing trends in the incidence of MI. The trend was APC, -0.96% (95% confidence interval (95%CI), –1.4 to –0.53) in women from 1990 to 2019 and –4.2% (95%CI, –5.5 to –3.0) in men from 1994 to 2019. The largest decrease in case fatality was –3.8% (95%CI, -5.1 to –2.5) from 1995 to 2003 in women and –2.4% (95%CI, –2.9 to –1.9) from 1995 to 2004 in men, mainly due to prehospital case fatality declines: -1.8% (95%CI, –2.6 to –1.1) in men and –3.2% (95%CI, –4.6 to –1.8) in women. ConclusionsIn Girona, MI incidence and case fatality decreased between 1990 and 2019. The incidence showed a slow but continuous decrease while case fatality only stabilized in the last decade, particularly in women.

Temporal trends in myocardial infarction case fatality: methodological challenges and prevention targets

Abstract Funding Acknowledgements Type of funding sources: Public grant(s) – National budget only. Main funding source(s): National Health and Medical Research Council of AustraliaHealy Medical Research Foundation Background Case fatality is an important indicator of severity and quality of care for myocardial infarction (MI). Most studies focus on hospitalised case fatality, which does not capture the total burden of MI deaths. Additionally, changes in diagnostic criteria and acute clinical care, and evidence that identifying all coronary heart disease (CHD) events better captures this patient group,1 have led to suggestions that a different definition of case fatality is required. Purpose The aim of the study was to determine the impact of different definitions of case fatality on the composition of fatal cases, and to measure trends in case fatality across a range of case definitions. Methods A whole-state linked hospital/death dataset was used to identify all MI, acute coronary syndromes (ACS) and CHD events (fatal + nonfatal) from 1997-2015. The traditional MI case fatality definition included all MI deaths as the numerator, stratified as MI hospitalisation with death ≤28 days, non-MI hospitalisation with MI death ≤28 days, or pre-hospital MI deaths. The denominator was all MIs (fatal plus nonfatal MI). ACS and a broader CHD definition were trialled, with ACS or CHD deaths as the numerator respectively, stratified in a similar manner as MI. Case fatality was age-standardised by 5-year age group using the internal age distribution of each definition as the standard. Results From 1997 to 2015, there were 76,928 MI events, 126,470 ACS events, and 235,100 CHD events. Of the MI cohort, 64.1% were men, and 13.0% had a prior MI, with a similar pattern in the ACS and CHD cohorts. For the traditional definition of MI case fatality, 10,819 deaths (53.9%) occurred pre-hospital, 4990 deaths in those hospitalised for MI and dying ≤28 days (24.8%), and 4271 MI deaths (21.3%) ≤28 days of a non-MI hospitalisation (Figure). Using the broadest CHD definition of case fatality, there was a similar proportion of pre-hospital deaths, but a higher proportion of CHD deaths in those with a non-CHD hospitalisation. In men, age-standardised MI case fatality declined from 40.0% in 1997 to 17.3% by 2015; in women, the decline was from 41.9% to 18.2%. In contrast, using the ACS and broad CHD definitions, age-standardised case fatality was lower than for MI throughout the study period, with a smaller temporal decline (ACS: men 22.2% to 13.1%, women 20.5% to 13.0%; CHD: men 20.6% to 12.4%, women 19.3% to 12.3%). Conclusion Despite substantial falls in MI case fatality, the fatal burden remains high. Regardless of the case fatality definition, pre-hospital deaths from acute or all CHD have remained high over time, highlighting the need to target the pre-hospital setting. Caution is needed when using different definitions of case fatality to ensure relevant statistics are used, particularly for temporal trends. Figure Legend. Proportion of MI deaths occurring ≤28 days after MI hospitalisation (2), ≤28 days after non-MI hospitalisation (3), and pre-hospital (4).

Sex differences in acute coronary syndrome management and in 12-month case-fatality trends: data from the French MONICA registries

Abstract Funding Acknowledgements Type of funding sources: Public hospital(s). Main funding source(s): Univ. Lille, Inserm, CHU Lille, Institut Pasteur de Lille, Santé publique France, U1167 - RID-AGE - Facteurs de risque et déterminants moléculaires des maladies liées au vieillissement, Lille, France. Background Earlier studies, have reported sex differences in clinical presentation, management and outcomes of acute coronary syndrome (ACS) which have prompted the medical community to take actions to erase these differences. To our knowledge, there has been no recent analysis of sex difference trends in ACS management, to assess whether these differences have been attenuated over time. Aim To assess recent sex differences trends in ACS characteristics, management and associated mortality. Methods We assessed all men and women (aged 35-74) hospitalized for an incident (first) ACS, in the 3 distinct geographical areas covered by the MONICA registries in the north, east and south-west of France, during a 12-month period in 2006 and a 6-month period in 2016. We analyzed the patients’ clinical, biochemical, electrocardiographic and care-related data, and their vital status 12 months after the ACS. Results We analyzed 2023 incident ACSs in 2006 and 1173 in 2016. The proportion of men was three times higher than that of women in both periods. In 2016, women were younger (62.0 y in 2006 and 60.4 y in 2016; p=0.06) and men were older (57.6 y in 2006 and 59.0 y in 2016; p<0.01). Women had no longer more atypical symptoms than men in 2016. In both men and women, the proportion of patients with NSTEMI increased from 26% in 2006 to 39% in 2016 (p<0.0001), whereas the proportion of patients with unstable angina decreased from 14% in 2006 to 7% in 2016 (p<0.0001). Between 2006 and 2016, the proportion of thrombolysis fell from 10% to 1% (p<0.0001); conversely, the proportion of patients receiving angioplasty increased from 67% to 75% (p<0.001). However, men were still more likely than women to receive revascularization therapy (+19% in 2006 and +18% in 2016). Between 2006 and 2016, prescriptions of angiotensin-converting enzyme inhibitors at discharge decreased from 68% to 64% (p< 0.01), and prescriptions of statins increased from 89% to 91% (p=0.02), as did prescription of functional rehabilitation from 34% to 40% (p<0.0001). Despite these trends, platelet aggregation inhibitors, statins and functional rehabilitation were still less prescribed in women than men in 2016 (p<0.01), independently of confounders. Finally, the 12-month case fatality rate was 11% in 2006 and 10% in 2016 (p=0.15), without sex differences. Conclusions The results of the present study evidenced an improvement over time in the management of ACS. However, although there were no longer sex differences in the patients’ age and clinical presentation, women with ACS were still less likely than men to receive revascularization and pharmacological treatments in 2016.

Mortalitní riziko pacientů hospitalizovaných mezi lety 2003 a 2019 pro ischemickou cévní mozkovou příhodu

Stroke represents an essential part of the burden of cardiovascular diseases. Despite specific mortality from cerebrovascular diseases decreasing in the Czech Republic since the 80s, the trends in case fatality and individual risk of patients who suffered from stroke remain questionable. In patients hospitalized for ischemic stroke, we evaluated the mortality trends in the last two decades.9076 patients (mean age 71.8, 51.9% males) hospitalized for ischemic stroke between 2003 and 2019 were followed. The vital status we ascertained up to 31.12.2020, other circumstances from the hospital information system Results: In total, 5583 patients died during follow-up. The in-hospital fatality was 9.1%, 30-day mortality 14.2%, and 1-year mortality 28.4%. In patients hospitalized from 2003 to 2015, the 5-year mortality was 49.8%. No significant changes were noted for in-hospital fatality, 30-days, 1-year mortality, as well as 5-years mortality risk across more extensive periods (2003-07, 2008-11, 2012-15 and 2016-19). As expected, any decade of patient´s age was associated with about two-fold higher mortality risk. Intravenous thrombolysis, as part of initial management, markedly increased over time (from 2.4% in 2003-07 to 48.1% in 2016-19). However, this procedure affected beneficially only 1-year mortality risk, while regarding 5-years mortality was its effect neutral.Despite favorable trends in cerebrovascular events from a population perspective, the individual prognosis of patients who have suffered a stroke remains very poor.

Temporal Trends in Case Fatality, Discharge Destination, and Admission to Long-term Care After Acute Stroke.

To determine contemporary trends in case fatality, discharge destination, and admission to long-term care after acute ischemic stroke and intracerebral hemorrhage (ICH) using a large, population-based cohort. We used linked administrative data to identify all emergency department visits and hospital admissions for first-ever ischemic stroke or ICH in Ontario, Canada, from 2003 to 2017. We calculated crude and age-/sex-standardized risk of death at 30 days and 1 year from stroke onset. We stratified crude trends by stroke type, age, and sex and used the Kendall τ-b correlation coefficient to evaluate the significance of trends. We determined trends in discharge home and to rehabilitation and admission to long-term care at 1 year. We used Cox proportional hazard and logistic regression models to assess whether trends in outcomes persisted after adjustment for baseline factors, estimated stroke severity, and use of life-sustaining care. There were 163,574 people with acute ischemic stroke or ICH across the study period. Between 2003 and 2017, age-/sex-standardized 30-day stroke case fatality decreased from 20.5% to 13.2% (7.3% absolute and 36% relative reduction) while that at 1 year decreased from 32.2% to 22.8% (9.3% absolute and 29% relative reduction). Findings were consistent across age, sex, and stroke type, and after adjustment for comorbid conditions, stroke severity, and use of life-sustaining care. There was a reduction in long-term care admission after ischemic stroke and an increase in discharge home or to rehabilitation for both stroke types. We observed substantial reductions in acute stroke case fatality from 2003 to 2017 with a concurrent increase in discharge to home or rehabilitation and a decrease in long-term care admissions, suggesting continuous improvements in stroke systems of care.

Prioritizing COVID-19 vaccinations for individuals with intellectual and developmental disabilities.

Prioritizing COVID-19 vaccinations for individuals with intellectual and developmental disabilities.

Journal Digest: IPSRT, Internet-Based CBT, Autism, IDD, Problem Drinking

Journal Digest: IPSRT, Internet-Based CBT, Autism, IDD, Problem Drinking

Intellectual and developmental disability and COVID-19 case-fatality trends: TriNetX analysis

BackgroundDespite possibly higher risk of severe outcomes from COVID-19 among people with intellectual and developmental disabilities (IDD), there has been limited reporting of COVID-19 trends for this population. ObjectiveTo compare COVID-19 trends among people with and without IDD, overall and stratified by age. MethodsData from the TriNetX COVID-19 Research Network platform was used to identify COVID-19 patients. Analysis focused on trends in comorbidities, number of cases, number of deaths, and case-fatality rate among patients with and without IDD who had a positive diagnosis for COVID-19 through May 14, 2020. ResultsPeople with IDD had higher prevalence of specific comorbidities associated with poorer COVID-19 outcomes. Distinct age-related differences in COVID-19 trends were present among those with IDD, with a higher concentration of COVID-19 cases at younger ages. In addition, while the overall case-fatality rate was similar for those with IDD (5.1%) and without IDD (5.4%), these rates differed by age: ages ≤17 – IDD 1.6%, without IDD <0.01%; ages 18–74 – IDD 4.5%, without IDD 2.7%; ages ≥75– IDD 21.1%, without IDD, 20.7%. ConclusionsThough of concern for all individuals, COVID-19 appears to present a greater risk to people with IDD, especially at younger ages. Future research should seek to document COVID-19 trends among people with IDD, with particular attention to age related trends.

Trends in case fatality after acute stroke: A 15-year population based study (2037)

Trends in case fatality after acute stroke: A 15-year population based study (2037)

Forty-two years of responding to Ebola virus outbreaks in Sub-Saharan Africa: a review

IntroductionEbola virus disease (EVD) is one of the deadliest haemorrhagic fevers affecting humans and non-human primates. Thirty-four outbreaks have been reported in Africa since it was first recognised in 1976....

Long-term deaths from melanoma according to tumor thickness at diagnosis.

There is little long-term follow-up information about how the number of melanoma deaths and case fatality vary over time according to the measured thickness of melanoma at diagnosis. This population-based longitudinal cohort study examines patterns and trends in case fatality among 44,531 people in Queensland (Australia) diagnosed with a single invasive melanoma (International Classification of Diseases for Oncology, third revision [ICD-O-3], C44, Morphology 872-879) between 1987 and 2011, including 11,883 diagnosed between 1987 and 1996, with up to 20 years follow-up (to December 2016). The 20-year case fatality increased by thickness, with the percentage of melanoma deaths within 20 years of diagnosis being up to 4.8% for melanomas with measured thickness <0.80 mm, 10.6% for tumors 0.8 to <1.0 mm and generally more than 30% for melanomas measuring 3 mm and more. For melanomas <1.0 mm, most deaths occurred between 5 and 20 years after diagnosis, whereas for thicker melanomas the reverse was true with most deaths occurring within the first 5 years. Five-year case fatality decreased over successive calendar time periods for melanomas <1.0 mm, but not for melanomas ≥1.0 mm. These findings demonstrate that the time course for fatal melanomas varies markedly according to tumor thickness at diagnosis. Improved understanding of the patient factors and characteristics of melanomas, in addition to tumor thickness, which increase the likelihood of progression, is needed to guide clinical diagnosis, communication with patients and ongoing surveillance pathways of patients with potentially fatal lesions.

Impact of public health initiatives on acute coronary syndrome fatality rates in Portugal

Introduction and ObjectiveEvery year cardiovascular disease (CVD) causes 3.9 million deaths in Europe. Portugal has implemented a set of public health policies to tackle CVD mortality: a smoking ban in 2008, a salt reduction regulation in 2010 and the coronary fast-track system (FTS) for acute coronary syndrome (ACS) in 2007. Our goal in this study was to analyze the impact of these three public health policies in reducing case-fatality rates from ACS between 2000 and 2016. MethodsThe impact of these policies on monthly ACS case-fatalities was assessed by creating individual models for each of the initiatives and implementing multiple linear regression analysis, using standard methods for interrupted time series. We also implemented segmented regression analysis to test which year showed a significant difference in the case-fatality slopes. ResultsSeparate modeling showed that the smoking ban (beta=-0.861, p=0.050) and the FTS (beta=-1.27, p=0.003) had an immediate impact after implementation, but did not have a significant impact on ACS trends. The salt reduction regulation did not have a significant impact. For the segmented model, we found significant differences between case-fatality trends before and after 2009, with rates before 2009 showing a steeper decrease. ConclusionsThe smoking ban and the FTS led to an immediate decrease in case-fatality rates; however, after 2009 no major decrease in case-fatality trends was found. Coronary heart disease constitutes an immense public health problem and it remains essential for decision-makers, public health authorities and the cardiology community to keep working to reduce ACS mortality rates.

Firearm assault in Philadelphia, 2005–2014: a comparison of police and trauma registry data

BackgroundFirearm injury is a major public health burden in the USA. Absent a single, reliable data source, researchers have attempted to describe firearm injury epidemiology using trauma registry data. To...

Annual Trends in Total Ischemic Time and One-Year Fatalities: The Paradox of STEMI Network Performance Assessment.

This study is aimed at assessing trends and relations between total ischemic time, the major quality measure of systemic delay, and case-fatality at the population or patient level in response to growing cardiovascular risk and a constant need to shorten the time to treatment in ST-segment elevation myocardial infarction (STEMI). Data from a prospective nationwide registry of STEMI patients admitted between 2006 and 2013 who were treated with primary percutaneous coronary intervention (PCI) were analyzed. Total ischemic time was calculated as the time from the onset of symptoms to primary PCI and was determined as individual and annual. The primary end-point was one-year, all-cause case-fatality. Among the total 70,093 analyzed patients, temporal trends showed significant decrease in total ischemic time (268 vs. 230 minutes, p < 0.001), a worsening of the risk profile and an increase in one-year case-fatality (7.1% vs. 10.8%, p < 0.001). In the multivariate analysis, longer individual total ischemic time was a risk factor for higher mortality (HR 1.024, 95%CI 1.015–1.034, p < 0.001) and remained significant after adjustment for the year of admission. An inverse relation was observed for the median annual time (HR 0.992, 95%CI 0.989–0.994, p < 0.001). Thus, the observed increasing annual trends in case-fatality cannot directly measure the quality of STEMI network performance.

Trends in Firearm Injury and Motor Vehicle Crash Case Fatality by Age Group, 2003-2013

If changes over time in trauma care apply to both firearm injuries and motor vehicle crashes (MVCs) similarly, differences in mechanism-specific case-fatality trends may suggest changes over time in injury severity. To analyze national trends in case-fatality percentages at levels I and II trauma centers for injuries due to MVC, firearm assault, self-inflicted firearm injury, and unintentional firearm injury by age and to analyze trends in injury severity scores (ISSs) and the percentage of out-of-hospital deaths by mechanism. From November 15, 2017, to July 4, 2018, repeated cross-sectional measures analysis of 1 335 044 patients treated at level I or II trauma centers from January 1, 2003, through December 31, 2013, was conducted using 2 data sources: the National Trauma Data Bank National Sample Program, with survey weights to estimate annual median ISS, total injuries and total deaths at levels I and II trauma centers, and the Centers for Disease Control and Prevention's Wide-Ranging Online Data for Epidemiologic Research for percentages of out-of-hospital deaths. The main outcome was annual case-fatality percentage (total died/total injured), calculated by mechanism across 3 age groups (15-34 years, 35-54 years, and ≥55 years) and 5 categories of ISS (1-15 [mild] 16-24, 25-40, 41-66, and 67-75 [severe]). Linear regression was performed to estimate annual trends in case-fatality percentage by mechanism, age group, and ISS. Annual trends in percentages of out-of-hospital deaths and median ISSs by mechanism were estimated. Sensitivity analyses included the Durbin-Watson statistic for autocorrelation and Prais-Winsten regression models. Among 1 335 044 patients treated at level I or II trauma centers, self-inflicted firearm injury had a case-fatality percentage of 42.8%, and assault with a firearm had a case-fatality percentage of 11.1%, the 2 highest of the injuries studied. The injury case-fatality percentage was lower each year for MVCs but did not change for any firearm intent overall or for any age group. Overall, median ISS increased annually for firearm suicide (0.31; 95% CI, 0.00-0.61). The annual percentage of out-of-hospital deaths was lower each year for MVCs (-0.24; 95% CI, -0.43 to -0.05) but not for any firearm intents. In sensitivity analyses, the annual percentage of out-of-hospital deaths for MVCs no longer showed a decline. Stagnant case-fatality percentages for firearm injuries juxtaposed to improvements for MVCs across age-groups and ISS categories suggests worsening severity of firearm injuries over the study period.