Epidemiological Analysis of 37,424 Carotid Artery Stenosis Intervention Procedures During 11 Years in the Public Health System in Brazil: Stenting has Been More Common Than Endarterectomy.

BACKGROUND: Stroke is a leading cause of death worldwide, with carotid atherosclerosis accounting for 10-20% of cases. In Brazil, the Public Health System provides care for roughly two-thirds of the population. No studies, however, have analysed large-scale results of carotid bifurcation surgery in Brazil. METHODS: This study aimed to describe rates of carotid artery stenting (CAS) and carotid endarterectomy (CEA) performed between 2008 and 2019 in the country through web scraping of publicly available databases. RESULTS: Between 2008 and 2019, 37,424 carotid bifurcation revascularization procedures were performed, of which 22,578 were CAS (60.34%) and 14,846 (39.66%) were CEA. There were 620 in-hospital deaths (1.66%), 336 after CAS (1.48%) and 284 after CEA (1.92%) (P = 0.032). Governmental reimbursement was US$ 77,216,298.85 (79.31% of all reimbursement) for CAS procedures and US$ 20,143,009.63 (20.69%) for CEA procedures. The average cost per procedure for CAS (US$ 3,062.98) was higher than that for CEA (US$ 1,430.33) (P = 0.008). CONCLUSIONS: In Brazil, the frequency of CAS largely surpassed that of CEA. In-hospital mortality rates of CAS were significantly lower than those of CEA, although both had mortality rates within the acceptable rates as dictated by literature. The cost of CAS, however, was significantly higher. This is a pioneering analysis of carotid artery disease management in Brazil that provides, for the first time, preliminary insight into the fact that the low adoption of CEA in the country is in opposition to countries where utilization rates are higher for CEA than for CAS.

Quality Improvement in Bariatric Surgery: The Impact of Reducing Postoperative Complications on Medicare Payments.

OBJECTIVE: To determine the temporal relationship between reducing surgical complications and costs, using the study population of bariatric surgery. BACKGROUND: Understanding the relationship between quality and costs has significant implications for the business case of investing in performance improvement. An unprecedented focus on safety in bariatric surgery has led to substantial reductions in complication rates over time, making it an ideal patient population in which to examine this relationship. METHODS: We performed a retrospective review of Medicare beneficiaries undergoing bariatric surgery in the years 2005 to 2006 and 2013 to 2014 (total N = 37,329 patients, 562 hospitals). Hospitals were ranked into quintiles based on their degree of improvement in risk and reliability-adjusted 30-day rates of serious complications across the time periods. Multivariable regression was used to calculate corresponding changes in average price-standardized payments for each quintile of hospitals. RESULTS: We found a strong association between reductions in complications and decreased Medicare payments. The top 20% of hospitals had a decrease in average serious complication rate of 7.3% (10.0%-2.7%; P < 0.001) and an average per-patient savings of $4861 (95% confidence interval $3921-5802). Conversely, the bottom 20% of hospitals had smaller decrease in complication rate of 0.8% (4.4% to 3.6%; P < 0.001) and a smaller average savings of $2814 (95% confidence interval $2139-3490). CONCLUSIONS: When analyzing Medicare patients undergoing bariatric surgery, hospitals with the largest reductions in serious postoperative complications had the greatest decrease in per-patient payments. This study demonstrates the potential savings associated with quality improvement in high-risk surgical procedures.

Patient Activation Changes as a Potential Signal for Changes in Health Care Costs: Cohort Study of US High-Cost Patients.

BACKGROUND: Programs to improve quality of care and lower costs for the highest utilizers of health services are proliferating, yet such programs have difficulty demonstrating cost savings. OBJECTIVE: In this study, we explore the degree to which changes in Patient Activation Measure (PAM) levels predict health care costs among high-risk patients. PARTICIPANTS: De-identified claims, demographic data, and serial PAM scores were analyzed on 2155 patients from multiple medical groups engaged in an existing Center for Medicare and Medicaid Innovation-funded intervention over 3 years designed to activate and improve care coordination for high-risk patients. DESIGN: In this prospective cohort study, four levels of PAM (from low to high) were used as the main predictor variable. We fit mixed linear models for log10 of allowed charges in follow-up periods in relation to change in PAM, controlling for baseline PAM, baseline costs, age, sex, income, and baseline risk score. MAIN MEASURES: Total allowed charges were derived from claims data for the cohort. PAM scores were from a separate database managed by the local practices. KEY RESULTS: A single PAM level increase was associated with 8.3% lower follow-up costs (95% confidence interval 2.5-13.2%). CONCLUSIONS: These findings contribute to a growing evidence base that the change in PAM score could serve as an early signal indicating the impact of interventions designed for high-cost, high-needs patients.

Impact of increasing tobacco taxes on working-age adults: short-term health gain, health equity and cost savings.

OBJECTIVE: The health gains and cost savings from tobacco tax increase peak many decades into the future. Policy-makers may take a shorter-term perspective and be particularly interested in the health of working-age adults (given their role in economic productivity). Therefore, we estimated the impact of tobacco taxes in this population within a 10-year horizon. METHODS: As per previous modelling work, we used a multistate life table model with 16 tobacco-related diseases in parallel, parameterised with rich national data by sex, age and ethnicity. The intervention modelled was 10% annual increases in tobacco tax from 2011 to 2020 in the New Zealand population (n=4.4 million in 2011). The perspective was that of the health system, and the discount rate used was 3%. RESULTS: For this 10-year time horizon, the total health gain from the tobacco tax in discounted quality-adjusted life years (QALYs) in the 20-65 year age group (age at QALY accrual) was 180 QALYs or 1.6% of the lifetime QALYs gained in this age group (11 300 QALYs). Nevertheless, for this short time horizon: (1) cost savings in this group amounted to NZ$10.6 million (equivalent to US$7.1 million; 95% uncertainty interval: NZ$6.0 million to NZ$17.7 million); and (2) around two-thirds of the QALY gains for all ages occurred in the 20-65 year age group. Focusing on just the preretirement and postretirement ages, the QALY gains in each of the 60-64 and 65-69 year olds were 11.5% and 10.6%, respectively, of the 268 total QALYs gained for all age groups in 2011-2020. CONCLUSIONS: The majority of the health benefit over a 10-year horizon from increasing tobacco taxes is accrued in the working-age population (20-65 years). There remains a need for more work on the associated productivity benefits of such health gains.

Potential cost savings to be made by slowing cognitive decline in mild Alzheimer's disease dementia using a model derived from the UK GERAS observational study.

BACKGROUND: Given the high costs associated with the care of those with Alzheimer's disease (AD) dementia, we examined the likely impact of a reduction in the rate of cognitive decline upon cost outcomes associated with this disease. METHODS: Using the group of patients with mild AD dementia from the GERAS study, generalised linear modelling (GLM) was used to explore the relationship between change in cognition as measured using the Mini-Mental State Examination (MMSE) and UK overall costs (health care and social care costs, and total societal costs) associated with AD dementia. RESULTS: A total of 200 patients with mild AD dementia were identified. Least squares mean (LSM) ± standard error (SE) reduction in MMSE score was 3.6 ± 0.4 points over 18 months. Using GLM it was possible to calculate that this worsening in cognition was associated with an 8.7% increase in total societal costs, equating to an increase of approximately £2200 per patient over an 18-month period. If the rate of decline in cognition was reduced by 30% or 50%, the associated savings in total societal costs over 18 months would be approximately £670 and £1100, respectively, of which only £110 and £180, respectively, could be attributed to a saving of health care costs. CONCLUSION: This study demonstrates that there are potential savings to be made in the care of patients with AD dementia through reducing the rate of cognitive decline. A reduction in wider societal costs is likely to be the main contributor to these potential savings, and need to be further evaluated when intervention costs and cost offsets can be measured.

Evaluation of pegfilgrastim use at an academic medical center.

PURPOSE: Pegfilgrastim is indicated to reduce the risk of febrile neutropenia. As a cost-savings initiative, Pegfilgrastim Process Guidelines were developed and implemented at a large, academic teaching institution to improve appropriate use of pegfilgrastim and to decrease costs of outpatient infusion center administration by deferring doses to home self-administration for eligible patients. METHODS: A retrospective medical record review was conducted post-implementation of the Pegfilgrastim Process Guideline to evaluate the use of pegfilgrastim and to assess the safety and efficacy of transferring pegfilgrastim orders from outpatient infusion center to home administration for eligible patients. RESULTS: Fifty-nine patients were included in the study, with 35 patients receiving pegfilgrastim in the outpatient infusion center, 13 patients self-injecting at home, and 11 patients receiving doses in both settings. The total wholesale cost avoidance for pegfilgrastim orders transferred to self-administration at home during this time period totaled $205,163. The revenue from outpatient prescriptions of pegfilgrastim totaled $291,111.93. The percentage of febrile neutropenia admissions was 11.4%, 0%, and 9.1% in the outpatient infusion, home, and outpatient/home group, respectively. CONCLUSION: Implementation of the Pegfilgrastim Process Guidelines demonstrated decreased total pegfilgrastim orders to be dispensed by the infusion center and a cost avoidance of $205,163 in four months without any perceivable changes in patient outcomes. This represents a significant cost-savings opportunity.

Potential savings in the diagnosis of vestibular schwannoma.

INTRODUCTION: Magnetic resonance imaging (MRI) is used to screen patients at risk for vestibular schwannoma (VS). These MRIs are costly and have an extremely low yield; only 3% of patients in the screening population has an actual VS. It might be worthwhile to develop a test to predict VS and refer only a subset of all patients for MRI. OBJECTIVE: To examine the potential savings of such a hypothetical diagnostic test before MRI. DESIGN: We built a decision analytical model of the diagnostic strategy of VS. Input was derived from literature and key opinion leaders. The current strategy was compared to hypothetical new strategies, assigning MRI to the following: (i) all patients with pathology, (ii) all patients with important pathology and (iii) only patients with VS. This resulted in potential cost savings for each strategy. We conducted a budget impact analysis to predict nationwide savings for the Netherlands and the United Kingdom (UK), and a probabilistic sensitivity analysis to address uncertainty. RESULTS: Mean savings ranged from €256 (95%CI €250 - €262) or approximately US$284 (95%CI US$277 - US$291) per patient for strategy 1 to €293 (95%CI €290 - €296) or approximately US$325 (95%CI US$322 - US$328) per patient for strategy 3. Future diagnostic strategies can cost up to these amounts per patient and still be cost saving. Annually, for the Netherlands, €2.8 to €3.2 million could be saved and €10.8 to €12.3 million for the UK. CONCLUSIONS: The model shows that substantial savings could be generated if it is possible to further optimise the diagnosis of VS.

Effects of the ACA on Health Care Cost Containment.

This brief reviews the evidence on how key ACA provisions have affected the growth of health care costs. Coverage expansions produced a predictable jump in health care spending, amidst a slowdown that began a decade ago. Although we have not returned to the double-digit increases of the past, the authors find little evidence that ACA cost containment provisions produced changes necessary to "bend the cost curve." Cost control will likely play a prominent role in the next round of health reform and will be critical to sustaining coverage gains in the long term.

New Hampshire Nurse Practitioners Take the Lead in Forming an Accountable Care Organization.

In 2012, New Hampshire nurse practitioners (NPs), along with Anthem Blue Cross/Blue Shield, formed the first Patient Centered Shared Savings Program in the nation, composed of patients managed by nurse practitioners employed within NP-owned and operated clinics. In this accountable care organization (ACO), NP-attributed patients were grouped into one risk pool. Data from the ACO and the NP risk pool, now in its third year, have produced compelling statistics. Nurse practitioners participating in this program have met or exceeded the minimum scores for 29 quality metrics along with a demonstrated cost-savings in the first 2 years of the program. Hospitalization rates for NP-managed patients are among the lowest in the state. Cost of care for NP-managed patients is $66.85 less per member per month than the participating physician-managed patients. Data from this ACO provide evidence that NPs provide cost-effective, quality health care and are integral to the formation and sustainability of any ACO.

The CareFirst Patient-Centered Medical Home Program: Cost and Utilization Effects in Its First Three Years.

BACKGROUND: Enhanced primary care models have diffused slowly and shown uneven results. Because their structural features are costly and challenging for small practices to implement, they offer modest rewards for improved performance, and improvement takes time. OBJECTIVE: To test whether a patient-centered medical home (PCMH) model that significantly rewarded cost savings and accommodated small primary care practices was associated with lower spending, fewer hospital admissions, and fewer emergency room visits. DESIGN: We compared medical care expenditures and utilization among adults who participated in the PCMH program to adults who did not participate. We computed difference-in-difference estimates using two-part multivariate generalized linear models for expenditures and negative binomial models for utilization. Control variables included patient demographics, county, chronic condition indicators, and illness severity. PARTICIPANTS: A total of 1,433,297 adults aged 18-64 years, residing in Maryland, Virginia, and the District of Columbia, and insured by CareFirst for at least 3 consecutive months between 2010 and 2013. INTERVENTION: CareFirst implemented enhanced fee-for-service payments to the practices, offered a large retrospective bonus if annual cost and quality targets were exceeded, and provided information and care coordination support. MEASURES: Outcomes were quarterly claims expenditures per member for all covered services, inpatient care, emergency care, and prescription drugs, and quarterly inpatient admissions and emergency room visits. RESULTS: By the third intervention year, annual adjusted total claims payments were $109 per participating member (95 % CI: -$192, -$27), or 2.8 % lower than before the program and compared to those who did not participate. Forty-two percent of the overall decline in spending was explained by lower inpatient care, emergency care, and prescription drug spending. Much of the reduction in inpatient and emergency spending was explained by lower utilization of services. CONCLUSIONS: A PCMH model that does not require practices to make infrastructure investments and that rewards cost savings can reduce spending and utilization.

Trends and Regional Variation in Hospital Mortality, Length of Stay and Cost in Hospital of Ischemic Stroke Patients in Alberta Accompanying the Provincial Reorganization of Stroke Care.

OBJECTIVES: This study aimed to evaluate the trends and regional variation of stroke hospital care in 30-day in-hospital mortality, hospital length of stay (LOS), and 1-year total hospitalization cost after implementation of the Alberta Provincial Stroke Strategy. METHODS: New ischemic stroke patients (N = 7632) admitted to Alberta acute care hospitals between 2006 and 2011 were followed for 1 year. We analyzed in-hospital mortality with logistic regression, LOS with negative binomial regression, and the hospital costs with generalized gamma model (log link). The risk-adjusted results were compared over years and between zones using observed/expected results. RESULTS: The risk-adjusted mortality rates decreased from 12.6% in 2006/2007 to 9.9% in 2010/2011. The regional variations in mortality decreased from 8.3% units in 2008/2009 to 5.6 in 2010/2011. The LOS of the first episode dropped significantly in 2010/2011 after a 4-year slight increase. The regional variation in LOS was 15.5 days in 2006/2007 and decreased to 10.9 days in 2010/2011. The 1-year hospitalization cost increased initially, and then kept on declining during the last 3 years. The South and Calgary zones had the lowest costs over the study period. However, this gap was diminishing. CONCLUSIONS: After implementation of the Alberta Provincial Stroke Strategy, both mortality and hospital costs demonstrated a decreasing trend during the later years of study. The LOS increased slightly during the first 4 years but had a significant drop at the last year. In general, the regional variations in all 3 indicators had a diminishing trend.

Per-pack price reductions available from different cigarette purchasing strategies: United States, 2009-2010.

OBJECTIVE: Following cigarette excise tax increases, smokers may use cigarette price minimization strategies to continue their usual cigarette consumption rather than reducing consumption or quitting. This reduces the public health benefits of the tax increase. This paper estimates the price reductions for a wide-range of strategies, compensating for overlapping strategies. METHOD: We performed regression analysis on the 2009-2010 National Adult Tobacco Survey (N=13,394) to explore price reductions that smokers in the United States obtained from purchasing cigarettes. We examined five cigarette price minimization strategies: 1) purchasing discount brand cigarettes, 2) using price promotions, 3) purchasing cartons, 4) purchasing on Indian reservations, and 5) purchasing online. Price reductions from these strategies were estimated jointly to compensate for overlapping strategies. RESULTS: Each strategy provided price reductions between 26 and 99cents per pack. Combined price reductions were possible. Additionally, price promotions were used with regular brands to obtain larger price reductions than when price promotions were used with generic brands. CONCLUSION: Smokers can realize large price reductions from price minimization strategies, and there are many strategies available. Policymakers and public health officials should be aware of the extent that these strategies can reduce cigarette prices.

The role of international NGOs in health systems strengthening: the case of Timor-Leste.

Achieving the United Nations Millennium Development Goals for health will require that programs supporting health in developing countries focus on strengthening national health care systems. However, the dominant neoliberal model of development mandates reduced public spending on health and other social services, often resulting in increased funding for nongovernmental organizations (NGOs) at the expense of support for government systems. East Timor, later Timor-Leste, is an example of a post-crisis country where international NGO efforts were initially critical to providing relief efforts to a traumatized population. Those groups were not prepared to help develop and support a standardized Timorese national health plan, however, and the cost of their support was unsustainable in the long term. In response, local authorities designed and implemented a post-crisis NGO phase-over plan that addressed risks to service disruption and monitored the process. Since then, some NGOs have worked collaboratively with the Ministry of Health to support specific efforts and initiatives under a framework provided by the ministry. Timor-Leste has shown that ministries of health can facilitate an effective transition of NGO support from crisis to development if they are allowed to plan and manage the process.

Growth of ambulatory surgical centers, surgery volume, and savings to medicare.

We studied the impact of the growth of ambulatory surgical centers (ASCs) on total Medicare procedure volume and ASC market share from 2000 to 2009 for four common outpatient procedures: cataract surgery, upper gastrointestinal procedures, colonoscopy, and arthroscopy. ASC growth was not significantly associated with Medicare volume, except for colonoscopy. An additional ASC operating room per 100,000 population results in a 1.8% increase in colonoscopies performed in all outpatient settings. Increases in the number of ASCs were associated with greater ASC market share with effects ranging from 4- to 6-percentage-point gains for each additional ASC operating room per 100,000. The study demonstrates that continued growth of ASCs could reduce Medicare spending, because ASCs are paid a fraction of the amount paid to hospital outpatient departments for the same services.

ICU early physical rehabilitation programs: financial modeling of cost savings.

OBJECTIVE: To evaluate the potential annual net cost savings of implementing an ICU early rehabilitation program. DESIGN: Using data from existing publications and actual experience with an early rehabilitation program in the Johns Hopkins Hospital Medical ICU, we developed a model of net financial savings/costs and presented results for ICUs with 200, 600, 900, and 2,000 annual admissions, accounting for both conservative- and best-case scenarios. Our example scenario provided a projected financial analysis of the Johns Hopkins Medical ICU early rehabilitation program, with 900 admissions per year, using actual reductions in length of stay achieved by this program. SETTING: U.S.-based adult ICUs. INTERVENTIONS: Financial modeling of the introduction of an ICU early rehabilitation program. MEASUREMENTS AND MAIN RESULTS: Net cost savings generated in our example scenario, with 900 annual admissions and actual length of stay reductions of 22% and 19% for the ICU and floor, respectively, were $817,836. Sensitivity analyses, which used conservative- and best-case scenarios for length of stay reductions and varied the per-day ICU and floor costs, across ICUs with 200-2,000 annual admissions, yielded financial projections ranging from -$87,611 (net cost) to $3,763,149 (net savings). Of the 24 scenarios included in these sensitivity analyses, 20 (83%) demonstrated net savings, with a relatively small net cost occurring in the remaining four scenarios, mostly when simultaneously combining the most conservative assumptions. CONCLUSIONS: A financial model, based on actual experience and published data, projects that investment in an ICU early rehabilitation program can generate net financial savings for U.S. hospitals. Even under the most conservative assumptions, the projected net cost of implementing such a program is modest relative to the substantial improvements in patient outcomes demonstrated by ICU early rehabilitation programs.

Cost savings associated with 10 years of road safety policies in Catalonia, Spain.

OBJECTIVE: To determine whether the road safety policies introduced between 2000 and 2010 in Catalonia, Spain, which aimed primarily to reduce deaths from road traffic collisions by 50% by 2010, were associated with economic benefits to society. METHODS: A cost analysis was performed from a societal perspective with a 10-year time horizon. It considered the costs of: hospital admissions; ambulance transport; autopsies; specialized health care; police, firefighter and roadside assistance; adapting to disability; and productivity lost due to institutionalization, death or sick leave of the injured or their caregivers; as well as material and administrative costs. Data were obtained from a Catalan hospital registry, the Catalan Traffic Service information system, insurance companies and other sources. All costs were calculated in euros (€) at 2011 values. FINDINGS: A substantial reduction in deaths from road traffic collisions was observed between 2000 and 2010. Between 2001 and 2010, with the implementation of new road safety policies, there were 26 063 fewer road traffic collisions with victims than expected, 2909 fewer deaths (57%) and 25 444 fewer hospitalizations. The estimated total cost savings were around €18 000 million. Of these, around 97% resulted from reductions in lost productivity. Of the remaining cost savings, 63% were associated with specialized health care, 15% with adapting to disability and 8.1% with hospital care. CONCLUSION: The road safety policies implemented in Catalonia in recent years were associated with a reduction in the number of deaths and injuries from traffic collisions and with substantial economic benefits to society.

Résumé OBJECTIF: Déterminer si les politiques de sécurité routière introduites entre 2000 et 2010 en Catalogne, Espagne, qui visaient principalement à réduire de 50% les décès causés par des collisions routières avant 2010, ont été associées à des avantages économiques pour la société. MÉTHODES: Une analyse des coûts a été réalisée dans une perspective sociétale sur un horizon temporel de 10 ans. Elle a pris en compte les coûts suivants: les admissions à l'hôpital, les transports en ambulance, les autopsies, les soins de santé spécialisés, la police, les pompiers et les dépannages routiers, l'adaptation au handicap et la productivité perdue en raison du placement des personnes dans des établissements spécialisés, les décès ou les congés des blessés ou de leurs aidants, ainsi que les coûts matériels et les frais administratifs. Les données provenaient du registre d'un hôpital catalan, du système d´information du Service catalan de la circulation, des compagnies d'assurance et d'autres sources. Tous les coûts ont été calculés en euros (€), selon les valeurs de l'année 2011. RÉSULTATS: Une diminution substantielle des décès causés par collision routière a été observée entre 2000 et 2010. Entre 2001 et 2010, grâce à la mise en œuvre de nouvelles politiques de sécurité routière, on a recensé une diminution de 26 063 collisions routières avec victimes, une diminution de 2909 décès (57%) et une diminution de 25 444 hospitalisations. Le total des économies estimé sur les coûts était d'environ 18 000 millions d'euros. En ce qui concerne ce chiffre, environ 97% résultaient de la réduction des coûts liés à la perte de productivité. Parmi les économies restantes, 63% étaient associées aux soins de santé spécialisés, 15% à l'adaptation au handicap et 8,1% aux soins hospitaliers. CONCLUSION: Les politiques de sécurité routière mises en place en Catalogne ces dernières années ont été associées à une réduction du nombre de décès et de blessures causés par des collisions routières et à des avantages économiques substantiels pour la société.

Resumen OBJETIVO: Determinar si las políticas de seguridad vial introducidas entre los años 2000 y 2010 en Cataluña, España, cuyo propósito principal era la reducción de los fallecimientos causados por accidentes de tráfico en un 50% hasta el 2010, estuvieron asociadas a un beneficio económico para la sociedad. MÉTODOS: Se llevó a cabo un análisis de costes desde una perspectiva social y un horizonte temporal de 10 años. Se tomaron en consideración los costes de las hospitalizaciones, el transporte en ambulancia, las autopsias, la atención sanitaria especializada, la policía, bomberos y asistencia en carretera, la adaptación a la discapacidad y la pérdida de productividad debido a la institucionalización, las bajas por enfermedad o fallecimiento de los heridos o sus cuidadores, así como los costes materiales y administrativos. Los datos se obtuvieron del registro de un hospital catalán, el sistema de información del servicio catalán de tráfico, compañías aseguradoras y otras fuentes. Todos los costes se calcularon en euros (€) según los valores del 2011. RESULTADOS: Entre los años 2000 y 2010 se observó una reducción importante de los fallecimientos causados por accidentes de tráfico. Entre el 2001 y el 2010, con la puesta en práctica de las nuevas políticas de seguridad vial, se produjeron 26 063 colisiones con víctimas menos de las esperadas, 2909 fallecimientos menos (57%), así como 25 444 hospitalizaciones menos. El ahorro total estimado fue de aproximadamente 18 000 millones de euros. De éstos, un 97% se derivó de la reducción de la pérdida de productividad, y del ahorro restante, el 63% estuvo asociado con la atención sanitaria especializada, el 15% con la adaptación a la discapacidad y el 8,1% con la atención hospitalaria. CONCLUSIÓN: Las políticas de seguridad vial puestas en marcha en Cataluña en los últimos años estuvieron asociadas a una reducción en el número de fallecidos y heridos por accidentes de tráfico, así como con beneficios económicos importantes para la sociedad.