Cumene Contamination in Groundwater: Observed Concentrations, Evaluation of Remediation by Sulfate Enhanced Bioremediation (SEB), and Public Health Issues.

Isopropylbenzene (cumene) is commonly encountered in groundwater at petroleum release sites due to its natural occurrence in crude oil and historical use as a fuel additive. The cumene concentrations detected at these sites often exceed regulatory guidelines or standards for states with stringent groundwater regulations. Recent laboratory analytical data collected at historical petroleum underground storage tank (UST) release sites have revealed that cumene persists at concentrations exceeding the default cleanup criterion, while other common petroleum constituents are below detection limits or low enough to allow natural attenuation as a remediation strategy. This effectively makes cumene the driver for active remediation at some sites. An insignificant amount of research has been conducted for the in-situ remediation of cumene. Sulfate Enhanced Biodegradation (SEB) is evaluated in a field case study. The results from the field case study show an approximate 92% decrease in plume area following three rounds of SEB injections. An additional objective of this research was to determine the cumene concentration in fuels currently being used to determine future impacts. A review of safety data sheets from several fuel suppliers revealed that cumene concentrations in gasoline are reported typically as wide ranges due to the proprietary formulations. Several fuels from different suppliers were analyzed to determine a baseline of cumene concentration in modern fuels. The results of the analysis indicated that cumene accounts for approximately 0.01% (diesel) to 0.13% (premium gasoline) of the overall fuel composition. Cumene generally is considered to be of low human health toxicity, with the principal concern being eye, skin, and respiratory irritation following inhalation of vapors in an occupational setting, but it has been regulated in Florida at very low concentrations based on organoleptic considerations.

Trends and Factors Associated With Physician Burnout at a Multispecialty Academic Faculty Practice Organization.

Importance: Physician burnout is common, and prevalence may differ throughout a clinician's career. Burnout has negative consequences for physician wellness, patient care, and the health care system. Identifying factors associated with burnout is critical in designing and implementing initiatives to reduce burnout. Objective: To measure trends and identify factors associated with physician burnout. Design, Setting, and Participants: Survey study conducted from May 16 to June 15, 2014, and again from May 16 to June 15, 2017, measuring rates of physician burnout in a large academic medical practice. Factors associated with burnout out were evaluated. In 2014, 1774 of 1850 eligible physicians (95.9%) completed the survey. In 2017, 1882 of 2031 (92.7%) completed the survey. Exposures: Medical specialty, demographic characteristics, years in practice, and reported rates of burnout. Main Outcomes and Measures: Burnout rates measured at 2 points and risk factors associated with burnout. Results: Respondents included 1027 men (57.9%) and 747 women (42.1%) in 2014 and 962 men (51.1%) and 759 women (40.3%) in 2017. The mean (SD) number of years since training completion was 15.3 (11.3) in the 2014 survey data and 15.1 (11.3) in the 2017 data. Burnout increased from 40.6% to 45.6% between the 2 points. The increased rate was associated with an increase in exhaustion (from 52.9% in 2014 to 57.7% in 2017; difference, 4.8%; 95% CI, 1.6%-8.0%; P = .004) and cynicism (from 44.8% in 2014 to 51.1% in 2017; difference, 6.3%; 95% CI, 3.1%-9.6%; P < .001). Compared with midcareer physicians (11-20 years since training), early-career physicians (≤10 years since training) were more susceptible to burnout (odds ratio, 1.36; 95% CI, 1.05-1.77), while physicians in their late career (>30 years since training) were less vulnerable (odds ratio, 0.59; 95% CI, 0.40-0.88). Conclusions and Relevance: Efforts to alleviate physician burnout and administrative burden require a combination of a shared commitment from physicians and organizations and central and locally implemented programs. Continued research is necessary to establish the most effective initiatives to decrease physician burnout at the individual and organizational level.

Behavioral Health Factors as Predictors of Emergency Department Use in the High-Risk, High-Cost Medicare Population.

OBJECTIVE: This study measured the presence, extent, and type of behavioral health factors in a high-cost Medicare population and their association with the probability and intensity of emergency department (ED) use. METHODS: Retrospective claims analysis and a comprehensive electronic medical record-based review were conducted for patients enrolled in a 65-month prospective care management program at an academic tertiary medical center (N=3,620). A two-part model used multivariable logistic regression to evaluate the effect of behavioral health factors on the probability of ED use, complemented by a Poisson model to measure the number of ED visits. Control variables included demographic characteristics, poststudy survival, and hierarchical condition category risk score. RESULTS: After analyses controlled for comorbidities and other relevant variables, patients with two or more behavioral health diagnosis categories or two or more behavioral health medications were about twice as likely as those without such categories or medications to use the ED. Patients with a diagnosis category of psychosis, neuropsychiatric disorders, sleep disorders, or adjustment disorders were significantly more likely than those without these disorders to use the ED. Most primary ED diagnoses were not of behavioral health conditions. CONCLUSIONS: Behavioral health factors had a substantial and significant effect on the likelihood and number of ED visits in a population of high-cost Medicare patients. Attention to behavioral health factors as independent predictors of ED use may be useful in influencing ED use in high-cost populations.

Attention Deficit/Hyperactivity Disorder and Sleep in Children.

Basic assumptions about ADHD in children and sleep are not supported by research. It is unclear that children with hyperactivity or inattention have disrupted sleep. Parents of children with ADHD consistently report more bedtime resistance, but there is no objective evidence that sleep is subsequently disrupted. Treatment of ADHD with stimulants may disrupt sleep. Studies of comorbid sleep or psychiatric disorders consistently show that they disrupt sleep. Melatonin is an effective treatment of sleep problems in children with ADHD. Before any child is placed on stimulants, the pediatrician or other health care professional should insure that the child is obtaining adequate sleep.

National Sleep Foundation's updated sleep duration recommendations: final report.

OBJECTIVE: To make scientifically sound and practical recommendations for daily sleep duration across the life span. METHODS: The National Sleep Foundation convened a multidisciplinary expert panel (Panel) with broad representation from leading stakeholder organizations. The Panel evaluated the latest scientific evidence and participated in a formal consensus and voting process. Then, the RAND/UCLA Appropriateness Method was used to formulate sleep duration recommendations. RESULTS: The Panel made sleep duration recommendations for 9 age groups. Sleep duration ranges, expressed as hours of sleep per day, were designated as recommended, may be appropriate, or not recommended. Recommended sleep durations are as follows: 14-17 hours for newborns, 12-15 hours for infants, 11-14 hours for toddlers, 10-13 hours for preschoolers, 9-11 hours for school-aged children, and 8-10 hours for teenagers. Seven to 9 hours is recommended for young adults and adults, and 7-8 hours of sleep is recommended for older adults. The self-designated basis for duration selection and critical discussions are also provided. CONCLUSIONS: Consensus for sleep duration recommendations was reached for specific age groupings. Consensus using a multidisciplinary expert Panel lends robust credibility to the results. Finally, limitations and caveats of these recommendations are discussed.

National Sleep Foundation's sleep time duration recommendations: methodology and results summary.

OBJECTIVE: The objective was to conduct a scientifically rigorous update to the National Sleep Foundation's sleep duration recommendations. METHODS: The National Sleep Foundation convened an 18-member multidisciplinary expert panel, representing 12 stakeholder organizations, to evaluate scientific literature concerning sleep duration recommendations. We determined expert recommendations for sufficient sleep durations across the lifespan using the RAND/UCLA Appropriateness Method. RESULTS: The panel agreed that, for healthy individuals with normal sleep, the appropriate sleep duration for newborns is between 14 and 17 hours, infants between 12 and 15 hours, toddlers between 11 and 14 hours, preschoolers between 10 and 13 hours, and school-aged children between 9 and 11 hours. For teenagers, 8 to 10 hours was considered appropriate, 7 to 9 hours for young adults and adults, and 7 to 8 hours of sleep for older adults. CONCLUSIONS: Sufficient sleep duration requirements vary across the lifespan and from person to person. The recommendations reported here represent guidelines for healthy individuals and those not suffering from a sleep disorder. Sleep durations outside the recommended range may be appropriate, but deviating far from the normal range is rare. Individuals who habitually sleep outside the normal range may be exhibiting signs or symptoms of serious health problems or, if done volitionally, may be compromising their health and well-being.

Interprofessional differences in disposition decisions: results from a standardized web-based patient assessment.

OBJECTIVE: This study examined differences in disposition decisions among mental health professionals using a standardized Web-based simulation. METHODS: Using a Web-based simulation that described, across users, the same complex psychiatric patient, credentialed clinicians in a psychiatry department conducted a violence risk assessment and selected a level of follow-up care. RESULTS: Of 410 clinicians who completed the simulation, 60% of psychiatrists were more likely than other types of clinicians to select higher levels of care (inpatient or emergency services) for the standardized virtual patient (odds ratio=2.67, 95% confidence interval=1.67-4.25), even after adjustment for other factors. Virtual actions taken, such as contracting with the patient for safety and discussing hospitalization, elucidated these training differences. CONCLUSIONS: Training backgrounds were important determinants of clinicians' actions and the dispositions they recommended for a psychiatric patient at high risk of self-harm and harm to others in the educational setting and may suggest the need for further training to standardize and optimize care.

Simulation-based ongoing professional practice evaluation in psychiatry: a novel tool for performance assessment.

BACKGROUND: Ongoing professional practice evaluation (OPPE) activities consist of a quantitative, competency-based evaluation of clinical performance. Hospitals must design assessments that measure clinical competencies, are scalable, and minimize impact on the clinician's daily routines. A psychiatry department at a large academic medical center designed and implemented an interactive Web-based psychiatric simulation focusing on violence risk assessment as a tool for a departmentwide OPPE. METHODS: Of 412 invited clinicians in a large psychiatry department, 410 completed an online simulation in April-May 2012. Participants received scheduled e-mail reminders with instructions describing how to access the simulation. Using the Computer Simulation Assessment Tool, participants viewed an introductory video and were then asked to conduct a risk assessment, acting as a clinician in the encounter by selecting actions from a series of drop-down menus. Each action was paired with a corresponding video segment of a clinical encounter with a standardized patient. Participants were scored on the basis of their actions within the simulation (Measure 1) and by their responses to the open-ended questions in which they were asked to integrate the information from the simulation in a summative manner (Measure 2). RESULTS: Of the 410 clinicians, 381 (92.9%) passed Measure 1,359 (87.6%) passed Measure 2, and 5 (1.2%) failed both measures. Seventy-five (18.3%) participants were referred for focused professional practice evaluation (FPPE) after failing either Measure 1, Measure 2, or both. CONCLUSIONS: Overall, Web-based simulation and e-mail engagement tools were a scalable and efficient way to assess a large number of clinicians in OPPE and to identify those who required FPPE.

Measuring outcomes in adult outpatient psychiatry.

Despite growing pressure for accountability, mental health professionals continue to debate the value of routinely measuring treatment outcomes. This paper sought to move the outcomes measurement debate forward by reviewing some of the current limitations in outcomes methodology and by providing initial strategies to address them. Using these strategies, we evaluated outcomes for a large diagnostically diverse group of adult outpatients receiving treatment as usual (TAU) within an academic medical centre. Initial self-report and clinician-rated assessments were obtained from 5546 patients, and follow-up data were obtained from 1572 (28%) patients. Using the subset of patients with the follow-up data, we determined treatment effect sizes, rates of reliable improvement (and deterioration) and rates of clinically significant improvement for all patients and for specific diagnostic groups (depression, anxiety, substance abuse, mood disorders not otherwise specified, bipolar and psychotic conditions). TAU outcomes for depression and anxiety were also compared with benchmarks derived from the randomized controlled trial literature. Lastly, the impact of patient or sample characteristics on outcome was explored. Overall, these findings generally support the benefit of TAU over no treatment while also highlighting both the utility and limitations inherent in the current approaches to evaluating treatment outcomes. Suggestions for improving outcomes measurement are provided.

Prevalence of lid wiper epitheliopathy in subjects with dry eye signs and symptoms.

PURPOSE: The purpose of this study was to investigate the prevalence of lid wiper epitheliopathy (LWE) in patients diagnosed with dry eye disease (DED). METHODS: Patients were recruited for two groups. Inclusion criteria for the DED group (n = 50) was: a score greater than 10 with the Standard Patient Evaluation of Eye Dryness questionnaire, fluorescein break-up time 5 seconds or less, corneal and conjunctival staining with fluorescein, lissamine green Grade 1 or greater (scale 0-3), and Schirmer test with anesthesia 5 mm or less. For the asymptomatic group (n = 50), inclusion criteria were: no dry eye symptoms, fluorescein break-up time 10 seconds or greater, no corneal or conjunctival staining, and Schirmer test 10 mm or greater. Sequential instillations (n = 2, 5 minutes apart) of a mixture of 2% fluorescein and 1% lissamine green solution were used to stain the lid wipers of all patients. LWE was graded (scale 0-3) using the horizontal lid length and the average sagittal lid widths of the stained wiper. RESULTS: In symptomatic patients, 88% had LWE, of which 22% was Grade 1, 46% Grade 2, and 20% Grade 3. In asymptomatic patients, 16% had LWE, of which 14% was Grade 1, 2% was Grade 2, and 0% Grade 3. The difference in prevalence of lid wiper staining between groups was significant (P < 0.0001). CONCLUSIONS: The prevalence of LWE was six times greater for the DED group and the prevalence of LWE Grade 2 or greater was 16 times greater for the DED group than for the control group. These data further establish LWE as a diagnostic sign of dry eye disease.

Secondary nocturnal enuresis caused by central sleep apnea from Chiari malformation type 1.

OBJECTIVE: To report a novel cause of nocturnal enuresis (NE) and highlight the literature giving insight into this novel mechanism. PATIENT: A 12-year-old morbidly obese female with 2-year history of nightly secondary monosymptomatic NE. RESULTS: On evaluation, a history of severe sleep disturbed breathing was elicited. Anticipating obstructive sleep apnea (OSA), polysomnography was performed, detecting severe central sleep apnea (CSA) without OSA. Brain magnetic resonance imaging revealed severe Chiari malformation Type I (CM1) with abnormal cerebrospinal fluid dynamics. She had no other classic signs or symptoms of CM1. Neurosurgical decompression halted the NE and normalized nocturnal breathing and cerebrospinal fluid dynamics, confirming that the CSA was caused by the CM1 and resulted in the NE. A thorough literature review found no prior reports of CSA-induced NE. Since CSA and OSA differ by the absence of negative intrathoracic pressures in CSA, this case suggests that such pressures are not a key mechanistic component of SA-induced NE. CONCLUSION: This first report of secondary NE caused by CSA from CM1 emphasizes obtaining a sleep history in the enuretic child, introduces a new cause of NE, and challenges hypotheses underlying SA-induced NE.