Identification of prescription opioid misuse and abuse behaviors and risk factors in chronic pain patients using the Prescription Opioid Misuse and Abuse Questionnaire (POMAQ).

OBJECTIVES: To identify patient risk factors associated with prescription opioid misuse and abuse as well as groupings of misuse and abuse behaviors as measured by the Prescription Opioid Misuse and Abuse Questionnaire (POMAQ). METHODS: Adults with chronic pain requiring long-term treatment with opioids completed the POMAQ and other study questionnaires. Latent class analysis (LCA) was used to examine underlying subgroups exhibiting particular risk profiles. Patient demographic and clinical characteristics were examined as covariates and the concordance between the identified latent classes at-risk classifications and the POMAQ clinical scoring algorithm was assessed. RESULTS: Analysis of data from 809 patients revealed four classes: "chronic pain, low risk" (n = 473, low to no prevalence of POMAQ behaviors), "chronic pain, comorbid condition" (n = 152, high prevalence of anti-anxiety, sleeping pill, and antihistamine use), "at risk" (n = 154, taking more opioids than prescribed and drinking alcohol with opioids more frequently than other groups), and "high risk" (n = 30, highest prevalence of each behavior). The "high risk" group was associated with being younger, less educated, and unemployed compared to other groups. When examining the LCA classes by groups defined by the original POMAQ clinical scoring algorithm, the "high risk" class had the highest proportion of participants identified with abuse behaviors (46.7%), compared to just 4.7% in the "chronic pain, low risk" group. CONCLUSIONS: Findings suggest there are four distinct subgroups of patients defined by chronic opioid misuse and abuse behaviors and support the use of the POMAQ to identify risk factors associated with prescription opioid misuse and abuse.

Antibiotic resistance patterns in infections associated with health care in a Third Level Center with hospital reconversion in the COVID-19 pandemic

Objetive: Description of the different isolated microorganisms and their prevalence in infections associated with health care, in addition to determining their patterns of resistance to antibiotics in patients admitted with a confirmed or suspected diagnosis of COVID-19 in the Intensive Care Unit, during a third-level medical center with hospital reconversion. Method: Patient demographic data was obtained from the clinical record, with defined criteria. Antibiotic resistance patterns were evaluated as well as the identification of isolated bacteria in cultures of expectoration, pleural fluid, catheter tips. For bacterial identification and resistance mechanisms, automated equipment and phenotypic tests were used, following the CLSI (Clinical & Laboratory Standards Institute) criteria. Results: A total of 100 patients with bacterial infection added to the main COVID-19 picture were obtained, representing pneumonia, urinary tract infection, catheter infections and bacteremia. A total of 100 strains were isolated, of which 84 are Extremely Drug Resistant, 12 Multidrug Resistant and only 4 variable sensitivity. The bacteria with the highest prevalence is Staphylococcus aureus with, followed by Pseudonomas aeruginosa and Stenotrophomonas maltophilia. 100% of the patients admitted to the ICU (Intensive Care Unit) had death. Conclusion: The increase in resistance to antibiotics in the COVID-19 pandemic has set off alarms due to the complication that this brings, and the improper use of drugs as prophylaxis or attempted treatment only generates selective pressure that leads to an increase in resistance as observed in the isolated strains in this study, where the vast majority present enzymes as well as other resistance mechanisms that confer them to be XDR (Extremely Drug Resistant).(AU)

Objetivo: Descripción de los diferentes microorganismos aislados y su prevalencia en infecciones asociadas a la atención de la salud, además de determinar sus patrones de resistencia a antibióticos en pacientes ingresados con diagnóstico confirmado o sospechado de COVID-19 en la Unidad de Cuidados Intensivos, en Centro médico de tercer nivel con reconversión hospitalaria. Método: Los datos demográficos de los pacientes se obtuvieron de la historia clínica, con criterios definidos. Se evaluaron patrones de resistencia a antibióticos, así como la identificación de bacterias aisladas en cultivos de expectoración, líquido pleural, puntas de catéter. Para la identificación bacteriana y los mecanismos de resistencia se utilizaron equipos automatizados y pruebas fenotípicas, siguiendo los criterios del CLSI (Clinical & Laboratory Standards Institute). Resultados: Se estudió un total de 100 pacientes con infección bacteriana sumado al cuadro principal de COVID-19, de los cuales representó neumonía, infección de vías urinarias, infecciones de catéter y bacteriemia. Se aislaron un total de 100 cepas, de las cuales 84 son Extremadamente Resistentes, 12 Multirresistentes y solo 4 de sensibilidad variable. La bacteria con mayor prevalencia es Staphylococcus aureus, seguida de Pseudonomas aeruginosa y Stenotrophomonas maltophilia. El 100% de los pacientes ingresados en UCI (Unidad de Cuidados Intensivos) tuvieron muerte. Conclusión: El aumento de las resistencias a los antibióticos en la pandemia de COVID-19 ha hecho saltar las alarmas por la complicación que esto trae consigo, y el uso inadecuado de fármacos como profilaxis o intento de tratamiento solo genera una presión selectiva que conduce a un aumento de las resistencias como se observa en las cepas aisladas en este estudio, donde la gran mayoría presenta enzimas así como otros mecanismos de resistencia que les confieren ser XDR (Extremadamente Resistente).(AU)

Are prescription misuse and illicit drug use etiologically distinct? A genetically-informed analysis of opioids and stimulants.

BACKGROUND: Drug classes are grouped based on their chemical and pharmacological properties, but prescription and illicit drugs differ in other important ways. Potential differences in genetic and environmental influences on the (mis)use of prescription and illicit drugs that are subsumed under the same class should be examined. Opioid and stimulant classes contain prescription and illicit forms differentially associated with salient risk factors (common route of administration, legality), making them useful comparators for addressing this etiological issue. METHODS: A total of 2410 individual Australian twins [Mage = 31.77 (s.d. = 2.48); 67% women] were interviewed about prescription misuse and illicit use of opioids and stimulants. Univariate and bivariate biometric models partitioned variances and covariances into additive genetic, shared environmental, and unique environmental influences across drug types. RESULTS: Variation in the propensity to misuse prescription opioids was attributable to genes (41%) and unique environment (59%). Illicit opioid use was attributable to shared (71%) and unique (29%) environment. Prescription stimulant misuse was attributable to genes (79%) and unique environment (21%). Illicit stimulant use was attributable to genes (48%), shared environment (29%), and unique environment (23%). There was evidence for genetic influence common to both stimulant types, but limited evidence for genetic influence common to both opioid types. Bivariate correlations suggested that prescription opioid use may be more genetically similar to prescription stimulant use than to illicit opioid use. CONCLUSIONS: Prescription opioid misuse may share little genetic influence with illicit opioid use. Future research may consider avoiding unitary drug classifications, particularly when examining genetic influences.

Clinical Pharmacology, Toxicity, and Abuse Potential of Opioids.

Opioids were the most common drug class resulting in overdose deaths in the United States in 2019. Widespread clinical use of prescription opioids for moderate to severe pain contributed to the ongoing opioid epidemic with the subsequent emergence of fentanyl-laced heroin. More potent analogues of fentanyl and structurally diverse opioid receptor agonists such as AH-7921 and MT-45 are fueling an increasingly diverse illicit opioid supply. Overdose from synthetic opioids with high binding affinities may not respond to a typical naloxone dose, thereby rendering autoinjectors less effective, requiring higher antagonist doses or resulting in a confusing clinical picture for health care providers. Nonscheduled opioid drugs such as loperamide and dextromethorphan are associated with dependence and risk of overdose as easier access makes them attractive to opioid users. Despite a common opioid-mediated pathway, several opioids present with unique pharmacodynamic properties leading to acute toxicity and dependence development. Pharmacokinetic considerations involve half-life of the parent opioid and its metabolites as well as resulting toxicity, as is established for tramadol, codeine, and oxycodone. Pharmacokinetic considerations, toxicities, and treatment approaches for notable opioids are reviewed.

Current attention-deficit/hyperactivity disorder and nonmedical prescription opioid use attributed to tramadol among male adolescents without conduct disorder in Egypt.

Background: Evidence for the association between attention-deficit/hyperactivity disorder (ADHD) and substance use disorders (SUDs) is common. However, little research has investigated this relationship among adolescents using nonmedical prescription opioids, particularly tramadol.Objective: To estimate the prevalence and correlates of ADHD among adolescents with tramadol misuse and without conduct disorder (CD).Methods: This study included 122 Egyptian adolescents (100% male) with opioid use disorders attributed to tramadol. The diagnosis of SUDs, ADHD, and CD (to exclude) was based on the SCID-I criteria of the DSM-IV-TR. Drug-related problems were assessed using the Drug Use Disorders Identification Test (DUDIT). All adolescents were screened for drugs by urinalysis.Results: Thirty-eight percent of adolescents with tramadol misuse had ADHD. Adolescents with tramadol misuse and ADHD were more likely to have a younger age of onset of smoking, substance use, and tramadol misuse than adolescents without ADHD.Conclusions: ADHD is common among adolescents with tramadol misuse. There is an association between ADHD and young age of onset of tramadol misuse and drug-related problems.

"Stories of starting": Understanding the complex contexts of opioid misuse initiation.

Background: The impacts of opioid use disorder and opioid-involved overdose are known, but less is known about the contexts in which people first misuse opioids, and the motivations for continued misuse. Methods: In-depth interviews with 26 individuals in Allegheny County, Pennsylvania with current or past histories of opioid misuse were conducted. Narratives were analyzed to understand the circumstances and influences contributing to initial and continued misuse of opioids. Results: Participants described social and familial contexts that normalized or accepted opioid misuse-this often included their own use of other illicit substances prior to initiating opioids. Participants also described initial use of opioids as related to efforts to cope with physical pain. They also described recognizing and then seeking psychological/emotional benefits from opioids. All three of these themes often overlapped and intersected in these stories of starting opioid misuse. Conclusions: Opioid misuse stemmed from complex interacting influences involving coping with physical and psychological pain, perception that opioids are needed to feel "normal", and acceptance or normalization of opioid use. This suggests a multi-pronged approach to both prevention and treatment are needed.

Sources of prescription opioids and tranquilizers for misuse among U.S. young adults: differences between high school dropouts and graduates and associations with adverse outcomes.

Background and Objectives: Prior research has identified that sources of prescription drugs for misuse vary based on educational attainment, which is important as certain sources are associated with adverse outcomes. The current research addressed limitations of the extant literature by creating distinct categories of push factors for high school dropout (e.g., negative school performance/experiences), pull factors for high school dropout (e.g., starting a family or getting a job), and high school graduates who did not attend college.Methods: Using data from the 2009-2014 National Survey on Drug Use and Health, prevalence of sources were estimated and design-based multivariable logistic regression investigated the association between sources and educational attainment. Additionally, multivariable logistic regression assessed the associations between sources and adverse outcomes (i.e., substance use, substance use disorders, and mental health) separately for each educational category.Results: College respondents were more likely to report "physician" and free from "friend/relative" and less likely to report "purchased" as sources. For most educational categories, "purchasing" prescription drugs was associated with adverse outcomes. Additionally, "theft/fake" prescription emerged as a source associated with adverse outcomes for college respondents, while "friend/relative" was associated with adverse outcomes for high school graduates that did not go on to college.Conclusions: This research has important clinical implications as it identified young adults with a college education as being less likely to obtain prescription drugs from sources known to be associated with adverse outcomes. It also highlighted how associations between sources and adverse outcomes vary based on educational attainment.

Vital Signs: Characteristics of Drug Overdose Deaths Involving Opioids and Stimulants - 24 States and the District of Columbia, January-June 2019.

INTRODUCTION: Provisional estimates indicate that drug overdose deaths increased in 2019 after a slight decrease in 2018. In 2018, overdose deaths primarily involved opioids, with continued increases in deaths involving illicitly manufactured fentanyls (IMFs). Deaths involving stimulants such as cocaine and methamphetamine are also increasing, mainly in combination with opioids. METHODS: CDC analyzed data on drug overdose deaths during January-June 2019 from 24 states and the District of Columbia (DC) in the State Unintentional Drug Overdose Reporting System to describe characteristics and circumstances of opioid- and stimulant-involved overdose deaths. RESULTS: Among 16,236 drug overdose deaths in 24 states and DC, 7,936 (48.9%) involved opioids without stimulants, 5,301 (32.6%) involved opioids and stimulants, 2,056 (12.7%) involved stimulants without opioids, and 943 (5.8%) involved neither opioids nor stimulants. Approximately 80% of overdose deaths involved one or more opioid, and IMFs were involved in three of four opioid-involved overdose deaths. IMFs, heroin, cocaine, or methamphetamine (alone or in combination) were involved in 83.8% of overdose deaths. More than three in five (62.7%) overdose deaths had documentation of at least one potential opportunity for overdose prevention intervention. CONCLUSIONS AND IMPLICATIONS FOR PUBLIC HEALTH PRACTICE: Identifying opportunities to intervene before an overdose death and implementing evidence-based prevention policies, programs, and practices could save lives. Strategies should address characteristics of overdoses involving IMFs, such as rapid overdose progression, as well as opioid and stimulant co-involvement. These efforts should be complemented by efforts to prevent initiation of prescription opioid and stimulant misuse and illicit drug use.

The off-prescription use of modafinil: An online survey of perceived risks and benefits.

Cognitive enhancing drugs are claimed to improve cognitive functions such as learning and attention. However, little is known presently about the characteristics of off-prescription cognitive enhancing drug users or their perceived everyday experience with these drugs. As modafinil is the most commonly used off-prescription cognitive enhancing drug, the current study aimed to provide a detailed profile of modafinil users and their experiences and perceptions of this drug. To this end, an online survey, targeting cognitive enhancing drug users and students, was advertised on forum sites. Information was obtained regarding demographic data, illicit drug use, psychiatric diagnosis and experience of modafinil. Of the 404 respondents, 219 reported taking modafinil. Of these the majority were male, American or British, university-educated and currently employed, with a mean age of 27. Overall, modafinil was perceived by users as being safe. Modafinil users reported higher levels of illicit drug use and psychiatric diagnosis than would be expected from population-based data. More frequent reported modafinil use was associated with higher numbers of perceived benefits whilst reported frequency of use was not associated with the number of perceived risks. There was also a tentative link between the reported use of modafinil and the reported presence of psychiatric disorders, largely depression and anxiety. Respondents who had reported a psychiatric diagnosis declared higher subjective benefits of modafinil. This may suggest further beneficial effects of modafinil or it may reflect insufficient medical treatment for psychiatric disorders in some people. Overall, the findings of the current study should be beneficial in informing clinicians and legislative bodies about the modafinil user profile and how modafinil is perceived.

Prescription Opioid Misuse and Risky Adolescent Behavior.

OBJECTIVES: Misuse of opioid medications (ie, using opioids differently than how a doctor prescribed the medication) is common among US adolescents and associated with preventable health consequences (eg, severe respiratory depression, seizures, heart failure, and death).1 New guidelines and recommendations have made providers more attuned to overprescribing and more vigilant about screening for opioid misuse.2 We hypothesized that youth who misused prescription opioids were more likely to report engaging in a broad range of other risky behaviors. METHODS: We used the Centers for Disease Control and Prevention's 2017 Youth Risk Behavior Surveillance Survey (n = 14 765), a cross-sectional, nationally representative survey of high school students. Students were sampled by using a 3-stage random cluster design. We conducted weighted logistic regressions to determine the strength of the association between our independent variable, ever misusing prescription opioids, and 22 dependent variables in the following categories: risky driving behaviors (4 variables), violent behaviors (3 variables), risky sexual behaviors (4 variables), substance use (10 variables), and suicide attempt (1 variable). RESULTS: In 2017, 14% of US adolescents reported ever misusing opioids. Those who misused prescription opioids were significantly more likely to have engaged in all 22 risky behaviors (adjusted odds ratios ranged from 2.0 to 22.3; P < .0001 for all tests) compared with other adolescents. CONCLUSIONS: Adolescents reporting ever misusing prescription opioids were more likely to have engaged in a broad range of risky behaviors. Health care providers screening for prescription opioid misuse may be ideally positioned to identify these high-risk youth and initiate early interventions.

Opioid withdrawal symptoms, a consequence of chronic opioid use and opioid use disorder: Current understanding and approaches to management.

WHAT IS KNOWN AND OBJECTIVE: Opioid use in the United States has reached unprecedented-some would even say crisis-levels. Although many individuals use opioid drugs as part of legitimate pain management plans, a significant number misuse prescription or illicit opioids. With regular opioid use, individuals develop tolerance and physical dependence; both are predictable, physiologic responses to repeated opioid exposure. However, a substantial number of individuals who misuse opioids will develop opioid use disorder (OUD), a complex, primary, chronic, neurobiological disease rooted in genetic, environmental and psychosocial factors. This article discusses OUD, opioid receptor physiology, and opioid withdrawal symptomatology and pathophysiology, as well as current treatment options available to reduce opioid withdrawal symptoms in individuals with physical dependence and/or OUD. METHODS: The research articles regarding OUD and its management have been reviewed thoroughly based on a PubMed literature search using keywords related to opioid dependence, its pathophysiology and current treatment strategies. RESULTS AND DISCUSSION: Tolerance/physical dependence and the behavioural characteristics associated with OUD reflect complex neurobiologic adaptations in several major systems of the brain, including the locus ceruleus and mesolimbic systems. Physical dependence is responsible for the distressing withdrawal symptoms individuals experience upon abrupt cessation or rapid dose reduction of exogenous opioids. Opioid withdrawal symptoms are a key driver behind continued opioid use, and a barrier to opioid discontinuation. Several opioid-based medications are available to treat patients with OUD; these treatments can diminish opioid withdrawal symptoms and cravings as well as block opioid effects in the event of relapse. Additionally, non-opioid drugs may be used during acute detoxification to help alleviate opioid withdrawal symptoms. WHAT IS NEW AND CONCLUSION: The opioid crisis has produced many challenges for physicians, one being the need to determine which patients would benefit most from maintenance therapy and which may be candidates for opioid discontinuation. In addition to summarizing current understanding of OUD, we provide a new algorithm for determining the need for continued opioid use as well as examples of situations where management of opioid withdrawal symptoms is indicated.

[Prehospital emergency care of patients exposed to poisoning: Assessment of epidemiological, clinical characteristics and quality of care]. / Atención prehospitalaria urgente de los pacientes pediátricos expuestos a tóxicos: características epidemiológico-clínicas y evaluación de la calidad asistencial.

OBJECTIVE: To describe the characteristics of paediatric patients with suspected poisoning treated by advanced life support (ALS) units, and to evaluate quality indicators (QI) for the prehospital emergency care of these patients. METHOD: A one-year observational study of patients under 18 years of age exposed to poisoning and treated by an ALS unit of the Medical Emergency System in Catalonia. Severe clinical criteria were defined, with 8 QI being evaluated for prehospital emergency care of poisoned paediatric patients. RESULTS: The study included a total of 254 patients, with a median age of 14 years-old (p25-75 = 7-16), with intentional poisoning in 50.8% of cases. The most frequently involved toxic agent was carbon monoxide (CO) (33.8%). Poisoning was found in 48.8% of those patients, being serious in 16.5%. Intentionally (OR 5.1; 95% CI: 1.9-13.8) and knowledge of the time of exposure (OD 3.1; 95% CI: 1.3-7.3) were independent risk factors associated with the appearance of severe clinical symptoms. Five QI did not reach the quality standard and included, availability of specific clinical guidelines, activated charcoal administration in selected patients, oxygen therapy administration at maximum possible concentration in carbon monoxide poisoning, electrocardiographic assessment in patients exposed to cardiotoxic substances, and recording of the minimum data set. CONCLUSIONS: Paediatric patients attended by ALS units showed specific characteristics, highlighting the involvement of CO and adolescents with voluntary poisoning. The QI assessment was useful to detect weak points in the quality of care of these patients and to develop strategies for improvement.

Opioid Epidemic or Pain Crisis? Using the Virginia All Payer Claims Database to Describe Opioid Medication Prescribing Patterns and Potential Harms for Patients With Cancer.

PURPOSE: A key challenge regarding the current opioid epidemic is understanding how concerns regarding opioid-related harms affect access to pain management, an essential element of cancer care. In certain regions of the United States where disproportionately high cancer mortality and opioid fatality rates coexist (such as southwest Virginia in central Appalachia), this dilemma is particularly pronounced. METHODS: This longitudinal, exploratory, secondary analysis used the Commonwealth of Virginia All Payer Claims Database to describe prescription opioid medication (POM) prescribing patterns and potential harms for adult patients with cancer living in rural southwest Virginia between 2011 and 2015. Descriptive and inferential statistical analyses were conducted at the patient, prescriber, and prescription levels to identify patterns and predictors of POM prescribing and potential harms. To explore geographic patterns, choropleth and heat maps were created. RESULTS: Of the total sample of patients with cancer (n = 4,324), less than 25% were prescribed a Controlled Substance Schedule II POM at least three times in any study year. More than 60% of patients never received a Controlled Substance Schedule II POM prescription. Six hundred fifty-two patients (15.1%) experienced 1,599 hospitalizations for any reason; 10 or fewer patients were admitted for 11 opioid use disorder-related hospitalizations. The main findings suggest potential undertreatment of cancer-related pain; no difference in risk for opioid-related hospitalization on the basis of frequency of POM prescriptions; and geographic disparities where opioid overdoses are occurring versus where POM prescription use is highest. CONCLUSION: These findings have significant opioid policy and practice implications related to the need for cancer-specific prescribing guidelines, how to optimally allocate health delivery services, and the urgent need to improve data interoperability and access related to POMs.

Prescription Opioid Misuse Among Adolescents.

Although recent spikes in overdose deaths are largely attributable to heroin and fentanyl, prescription opioids still account for a significant percentage of overdose deaths. Additionally, overdose deaths are not a problem solely for adults; roughly 8% of all overdose deaths occur in persons aged 15 to 24. In addition to identifying factors that increase risk for misuse and negative outcomes among adolescents, research must examine the causal mechanisms that link these factors to increased risk. Finally, the extant research must serve as the foundation for prevention/intervention strategies and identify treatments that are effective among adolescents with opioid use disorders.

Prescription Stimulants: From Cognitive Enhancement to Misuse.

The nonmedical use of prescription stimulants has become increasingly pervasive among transitional age youth (TAY), aged 16 years to 26 years. Although therapeutically administered stimulants are regarded as safe and effective in TAY with attention-deficit/hyperactivity syndrome (ADHD), stimulant misuse is of concern due to prevalence, behavioral health and substance use correlates, and negative short-term and long-term outcomes. Although academic motivations primarily drive misuse, it is unclear whether prescription ADHD stimulants enhance cognition. Providers are advised to exercise precautions when prescribing ADHD medications, enhance surveillance for misuse, and screen those with misuse for ADHD and other psychopathology, executive dysfunction, and substance use disorders.

Impaired driving: A case report. Pickup truck centerline crossover collision with medium-size bus on U.S. Highway 83, Concan, Texas, United States.

Objective: The objective of this communication is to describe a crash involving an impaired pickup truck driver who crossed the centerline and struck a medium-size bus carrying senior adults restrained with lap-only belts that resulted in 13 fatalities.Methods: Document review of the National Transportation Safety Board investigation was performed. Documents are available at: https://dms.ntsb.gov/pubdms/search/hitlist.cfm?docketID=61581&CFID=2452299&CFTOKEN=9e7f5cd49ac23dc3-47A7BE1A-B81A-1A8F-7B1554A90617B722.Results: Prior to the crash, the erratic movement of the pickup truck being driven by a 20-year-old man was videotaped by witnesses in a following vehicle (https://www.youtube.com/watch?v=jsGsbYTwWbM). The 14.5-min cell phone recording demonstrated the pickup truck swerving repeatedly over the double yellow center line and onto the shoulder. The recording ended before the crash. While rounding a curve in the roadway, the pickup crossed the centerline and struck a medium-size bus with 14 occupants. All but one of the rearmost bus occupants were fatally injured in the collision. The pickup driver survived with serious injuries. Following the crash, toxicology testing found that the pickup truck driver had used marijuana in combination with a prescription benzodiazepine, clonazepam. The bus occupants ranged in age from 64 to 87 years old and all were wearing the available restraints, which included lap-shoulder belts and air bags (both of which deployed) for the driver and front seat passenger. Of the 12 rear passenger seats, 8 were equipped with traveling retractor lap belt assemblies and the 2-person bench seats in the last row on each side of the bus were equipped with manually adjustable lap belt assemblies.Conclusions: The failure of the truck driver to maintain control of his vehicle was due to impairment stemming from his use of marijuana in combination with misuse of a prescribed medication, clonazepam. Following the crash, the pickup driver was sentenced to 55 years in prison. Improved countermeasures including guidance and access to improved roadside testing methods, expanded law enforcement training to detect impaired drivers, enhanced enforcement regarding impairment by combinations of drugs or drugs and alcohol, as well an evaluation and implementation of data-driven strategies are needed to reduce fatalities, injuries, and crashes involving drivers impaired by alcohol and other drugs. The lap belts provided insufficient protection for the passengers seated in the rear of the bus aft of the intrusion zone; standard installation by vehicle manufacturers of lap-shoulder belts on medium-size as well as larger buses (now required) could mitigate the risk of injury in the event of a crash.