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1.
Milbank Q ; 101(S1): 579-612, 2023 04.
Artigo em Inglês | MEDLINE | ID: mdl-37096629

RESUMO

Policy Points Firearm injury is a leading cause of death in the United States, with fatality rates increasing 34.9% over the past decade (2010-2020). Firearm injury is preventable through multifaceted evidence-based approaches. Reviewing past challenges and successes in the field of firearm injury prevention can highlight the future directions needed in the field. Adequate funding, rigorous and comprehensive data availability and access, larger pools of diverse and scientifically trained researchers and practitioners, robust evidence-based programming and policy implementation, and a reduction in stigma, polarization, and politicization of the science are all needed to move the field forward.


Assuntos
Armas de Fogo , Suicídio , Ferimentos por Arma de Fogo , Estados Unidos , Humanos , Violência , Homicídio
2.
Planta ; 255(2): 36, 2022 Jan 11.
Artigo em Inglês | MEDLINE | ID: mdl-35015152

RESUMO

MAIN CONCLUSION: Decreased PG constrains PSI activity due to inhibition of transcript and polypeptide abundance of light-harvesting and reaction center polypeptides generating a reversible, yellow phenotype during cold acclimation of pgp1. Cold acclimation of the Arabidopsis pgp1 mutant at 5 °C resulted in a pale-yellow phenotype with abnormal chloroplast ultrastructure compared to its green phenotype upon growth at 20 °C despite a normal cold-acclimation response at the transcript level. In contrast, wild type maintained its normal green phenotype and chloroplast ultrastructure irrespective of growth temperature. In contrast to cold acclimation of WT, growth of pgp1 at 5 °C limited the accumulation of Lhcbs and Lhcas assessed by immunoblotting. However, a novel 43 kD polypeptide of Lhcb1 as well as a 29 kD polypeptide of Lhcb3 accumulated in the soluble fraction which was absent in the thylakoid membrane fraction of cold-acclimated pgp1 which was not observed in WT. Cold acclimation of pgp1 destabilized the Chl-protein complexes associated with PSI and predisposed energy distribution in favor of PSII rather than PSI compared to the WT. Functionally, in vivo PSI versus PSII photochemistry was inhibited in cold-acclimated pgp1 to a greater extent than in WT relative to controls. Greening of the pale-yellow pgp1 was induced when cold-acclimated pgp1 was shifted from 5 to 20 °C which resulted in a marked decrease in excitation pressure to a level comparable to WT. Concomitantly, Lhcbs and Lhcas accumulated with a simultaneous decrease in the novel 43 and 29kD polypeptides. We conclude that the reduced levels of phosphatidyldiacylglycerol in the pgp1 limit the capacity of the mutant to maintain the structure and function of its photosynthetic apparatus during cold acclimation. Thus, maintenance of normal thylakoid phosphatidyldiacylglycerol levels is essential to stabilize the photosynthetic apparatus during cold acclimation.


Assuntos
Arabidopsis , Fotossíntese , Aclimatação , Arabidopsis/genética , Arabidopsis/metabolismo , Clorofila , Temperatura Baixa , Complexos de Proteínas Captadores de Luz , Peptídeos , Fotoquímica , Complexo de Proteína do Fotossistema I/metabolismo , Complexo de Proteína do Fotossistema II/metabolismo
3.
Prev Med ; 156: 106955, 2022 03.
Artigo em Inglês | MEDLINE | ID: mdl-35065980

RESUMO

Firearms are a leading cause of injury mortality across the lifespan, with elevated risks for older adult populations. To inform prevention efforts, we conducted a probability-based web survey (12/1/2019-12/23/2019) of 2048 older adults (age 50-80) to characterize national estimates of firearm ownership, safety practices, and attitudes about health screening, counseling, and policy initiatives. Among older U.S. adults, 26.7% [95%CI = 24.8%-28.8%] report owning one or more firearms. The primary motivation for ownership was protection (69.5%), with 90.4% highlighting a fear of criminal assault. 39.4% of firearm owners reported regularly storing firearm(s) unloaded and locked, with 24.2% regularly storing at least one loaded and unlocked. While most firearm owners found healthcare screening (69.2% [95%CI: 64.9-73.1]) and safety counseling (63.2% [95%CI = 58.8-67.3]) acceptable, only 3.7% of older adults reported being asked about firearm safety by a healthcare provider in the past year. Among firearm owners, there was support for state-level policy interventions, including allowing family/police to petition courts to restrict access when someone is a danger to self/others (78.9% [95%CI = 75.1-82.3]), comprehensive background checks (85.0% [95%CI = 81.5-87.9]), restricting access/ownership under domestic violence restraining orders (88.1%; 95%CI = 84.9-90.7], and removing firearms from older adults with dementia/confusion (80.6%; 95%CI = 76.8-84.0]. Healthcare and policy-level interventions maintained higher support among non-owners than owners (p's < 0.001). Overall, data highlights opportunities exist for more robust firearm safety prevention efforts among older adults, particularly healthcare-based counseling and state/federal policies that focus on addressing lethal means access among at-risk individuals.


Assuntos
Armas de Fogo , Adulto , Idoso , Idoso de 80 Anos ou mais , Atitude , Humanos , Pessoa de Meia-Idade , Propriedade , Polícia , Segurança , Inquéritos e Questionários
4.
Inj Prev ; 28(3): 231-237, 2022 06.
Artigo em Inglês | MEDLINE | ID: mdl-34716179

RESUMO

BACKGROUND AND OBJECTIVES: Youth violence is an alarming public health problem, yet, violence screening and interventions are not systematically offered in primary care (PC). This paper describes data from a pilot effectiveness-implementation trial of an efficacious youth violence prevention programme (SafERteens). METHODS: The study was conducted in two PC clinics: a university-affiliated satellite clinic and a community health centre. In phase 1, we obtained stakeholder feedback to customise the SafERteens package and enrolled a comparison group of adolescents (age 14-18) seeking care in two clinics. In phase 2, clinical staff delivered the SafERteens-PC intervention with adolescents, which is a single, behavioural health therapy session delivered one-on-one from clinic providers to youth patients, followed by text message (TM) reminders. In phase 3, we assessed planned maintenance. All participants reported past-year violent behaviour at intake and completed a 3-month follow-up assessment. RESULTS: Based on stakeholder interviews (n=13), we created a web-based SafERteens-PC programme package, including a three-item past-year violence screen, 30 min motivational interviewing-based brief intervention delivery tool, training videos and 2 months of TM boosters. We enrolled a comparison group (n=49) first, then an intervention group (n=61). Intervention delivery characteristics varied by clinic, including completion of intervention (75.9%; 62.5%), modality (100% delivered via telehealth; 60% via telehealth/40% in-person) and enrolment in TMs (81.8%; 55.0%); 91.8% completed the follow-up. Using an intention-to-treat approach, the intervention group showed significantly greater reductions in severe peer aggression (p<0.05), anxiety (p<0.05) and substance use consequences (p<0.05) relative to the comparison group. Participant and staff feedback were positive and identified challenges to long-term implementation, such as lack of availability of reimbursement for youth violence prevention. CONCLUSIONS: If these challenges could be addressed, routine provision of behavioural health services for violence prevention in PC could have high impact on health outcomes for adolescents.


Assuntos
Comportamento do Adolescente , Entrevista Motivacional , Adolescente , Agressão , Ensaios Clínicos como Assunto , Humanos , Estudos Multicêntricos como Assunto , Projetos Piloto , Atenção Primária à Saúde , Violência/prevenção & controle
5.
J Emerg Med ; 62(1): 109-124, 2022 01.
Artigo em Inglês | MEDLINE | ID: mdl-34688506

RESUMO

BACKGROUND: Youth violence is a leading cause of adolescent mortality, underscoring the need to integrate evidence-based violence prevention programs into routine emergency department (ED) care. OBJECTIVES: To examine the translation of the SafERteens program into clinical care. METHODS: Hospital staff provided input on implementation facilitators/barriers to inform toolkit development. Implementation was piloted in a four-arm effectiveness-implementation trial, with youth (ages 14-18 years) screening positive for past 3-month aggression randomized to either SafERteens (delivered remotely or in-person) or enhanced usual care (EUC; remote or in-person), with follow-up at post-test and 3 months. During maintenance, ED staff continued in-person SafERteens delivery and external facilitation was provided. Outcomes were measured using the RE-AIM implementation framework. RESULTS: SafERteens completion rates were 77.6% (52/67) for remote and 49.1% (27/55) for in-person delivery. In addition to high acceptability ratings (e.g., helpfulness), post-test data demonstrated increased self-efficacy to avoid fighting among patients receiving remote (incidence rate ratio [IRR] 1.22, 95% confidence interval [CI] 1.09-1.36) and in-person (IRR 1.23, 95% CI 1.12-1.36) SafERteens, as well as decreased pro-violence attitudes among patients receiving remote (IRR 0.83, 95% CI 0.75-0.91) and in-person (IRR 0.87, 95% CI 0.77-0.99) SafERteens when compared with their respective EUC groups. At 3 months, youth receiving remote SafERteens reported less non-partner aggression (IRR 0.52, 95% CI 0.31-0.87, Cohen's d -0.39) and violence consequences (IRR 0.47, 95% CI 0.22-1.00, Cohen's d -0.49) compared with remote EUC; no differences were noted for in-person SafERteens delivery. Barriers to implementation maintenance included limited staff availability and a lack of reimbursement codes. CONCLUSIONS: Implementing behavioral interventions such as SafERteens into routine ED care is feasible using remote delivery. Policymakers should consider reimbursement for violence prevention services to sustain long-term implementation.


Assuntos
Serviços Médicos de Emergência , Violência , Adolescente , Agressão , Terapia Comportamental , Serviço Hospitalar de Emergência , Humanos , Violência/prevenção & controle
6.
Med Educ Online ; 26(1): 1955646, 2021 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-34282995

RESUMO

BACKGROUND: A pediatric injury prevention course has not been available as a massive open online course (MOOC). Creating a comprehensive topic course is particularly challenging because the traditional, week-by-week linear curriculum design is often a barrier to learners interested in only specific topics. We created a novel, flexible course as both a 'choose your topic' MOOC for the public learner and a Small Private Online Course (SPOC) for medical students. METHODS: We describe creating 'Injury Prevention for Children and Teens', a course of 59 video learning segments within eight modules taught by a multidisciplinary panel of 25 nationally-recognized experts. Completion tracking and course evaluations were collected. RESULTS: In 2.5 years, 4,822 learners from 148 countries have enrolled. Two-thirds of learners were female. Median age of learners was 31 years. For engagement, 19.3% (n = 932) of learners attempted quizzes, and 5.2% (n = 252) participated in online forum discussions. Medical professionals (n = 162) claimed an average of 13 credit hours per learner. Over 200 senior medical students have taken the SPOC. CONCLUSION: 'Injury Prevention for Children and Teens' is a novel approach to injury prevention education that is broad, science-based, accessible, and not cost-prohibitive for a diverse group of global learners.


Assuntos
Currículo , Educação a Distância/organização & administração , Educação Médica/métodos , Educação Médica/organização & administração , Adulto , Difusão de Inovações , Feminino , Humanos , Aprendizagem , Masculino , Pediatria/educação , Estudantes de Medicina/psicologia , Estudantes de Medicina/estatística & dados numéricos , Ferimentos e Lesões/prevenção & controle
7.
Inj Prev ; 27(5): 500-505, 2021 10.
Artigo em Inglês | MEDLINE | ID: mdl-33397794

RESUMO

Community rapid response may reduce opioid overdose harms, but is hindered by the lack of timely data. To address this need, we created and evaluated the Michigan system for opioid overdose surveillance (SOS). SOS integrates suspected fatal overdose data from Medical Examiners (MEs), and suspected non-fatal overdoses (proxied by naloxone administration) from the Michigan Emergency Medical Services (EMS) into a web-based dashboard that was developed with stakeholder feedback. Authorised stakeholders can view approximate incident locations and automated spatiotemporal data summaries, while the general public can view county-level summaries. Following Centers for Disease Control and Prevention (CDC) surveillance system evaluation guidelines, we assessed simplicity, flexibility, data quality, acceptability, sensitivity, positive value positive (PVP), representativeness, timeliness and stability of SOS. Data are usually integrated into SOS 1-day postincident, and the interface is updated weekly for debugging and new feature addition, suggesting high timeliness, stability and flexibility. Regarding representativeness, SOS data cover 100% of EMS-based naloxone adminstrations in Michigan, and receives suspected fatal overdoses from MEs covering 79.1% of Michigan's population, but misses those receiving naloxone from non-EMS. PVP of the suspected fatal overdose indicator is nearly 80% across MEs. Because SOS uses pre-existing data, added burden on MEs/EMS is minimal, leading to high acceptability; there are over 300 authorised SOS stakeholders (~6 new registrations/week) as of this writing, suggesting high user acceptability. Using a collaborative, cross-sector approach we created a timely opioid overdose surveillance system that is flexible, acceptable, and is reasonably accurate and complete. Lessons learnt can aid other jurisdictions in creating analogous systems.


Assuntos
Overdose de Drogas , Serviços Médicos de Emergência , Overdose de Opiáceos , Overdose de Drogas/epidemiologia , Overdose de Drogas/prevenção & controle , Humanos , Michigan/epidemiologia , Naloxona/uso terapêutico , Antagonistas de Entorpecentes/uso terapêutico
8.
J Interpers Violence ; 36(5-6): NP2410-NP2422, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-29580195

RESUMO

Video gaming, a remarkably popular hobby in the United States, has been consistently identified as a correlate of aggressive behavior, and this association is not limited to violent video gaming. Prior studies of sex differences in the association between video gaming and aggression have not controlled for other well-known violence correlates (e.g., substance use, community violence exposure, violence attitudes) or focused primarily on high-risk youth. In this study, we used data from an emergency department in Flint, Michigan (N = 409, 59.9% female, 93.4% African American) to identify sex differences in the association between video gaming and serious peer violence. Youth aged 14 to 20 years were recruited from October 2011 to March 2015, and self-administered computerized surveys including measures of demographics, violence perpetration, gaming frequency, substance use, community violence exposure, and violence attitudes. The primary outcome was an indicator of any serious violence perpetration (e.g., choking, burning, weapon violence) in the past 2 months. Using logistic regression, we estimated the association between gaming and serious violence perpetration, and how it varied by sex, while controlling for demographics, substance use, community violence exposure, and violence attitudes. Approximately 36.6% of males and 27.3% of females reported past 2-month serious violence. On adjusted analysis, hours spent gaming was associated with violence among females (odds ratio [OR] = 1.40, 95% confidence interval [CI] = [1.16, 1.78]), but not males (OR = 1.03, 95% CI = [0.89, 1.19]); in the model including both males and females, the interaction between hours gaming and sex was significant (p < .01). Our findings suggest video gaming is a stronger marker of severe violence perpetration in females than males among at-risk youth. Violence interventions among females may be improved by including content related to video gaming and identifying other prosocial activities for youth as an alternative to video gaming. Additional research is required to clarify the causal process underlying the identified associations, and to determine what aspects of video gaming are risk-enhancing.


Assuntos
Comportamento do Adolescente , Jogos de Vídeo , Adolescente , Negro ou Afro-Americano , Feminino , Humanos , Masculino , Michigan , Caracteres Sexuais , Estados Unidos , Violência
9.
Prev Med ; 132: 105972, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-31904397

RESUMO

The U.S. opioid epidemic is a critical public health problem. As substance use and misuse typically begin in adolescence and emerging adulthood, there is a critical need for prevention efforts for this key developmental period to disrupt opioid misuse trajectories, reducing morbidity and mortality [e.g., overdose, development of opioid use disorders (OUD)]. This article describes the current state of research focusing on prescription opioid misuse (POM) among adolescents and emerging adults (A/EAs) in the U.S. Given the rapidly changing nature of the opioid epidemic, we applied PRISMA Scoping Review (PRISMA-ScR) guidelines to identify empirical articles published in the past 5 years (January 2013-September 2018) from nine databases examining POM among A/EAs (ages 10-25) in the U.S. Seventy-six articles met our inclusion criteria focusing on POM in the following areas: cross-sectional surveys (n = 60), longitudinal cohort studies (n = 5), objective, non-self-reported data sources (n = 9), and interventions (n = 2). Final charted data elements were organized by methodology and sample, with results tables describing design, sample, interventions (where applicable), outcomes, and limitations. Most studies focused on the epidemiology of POM and risk/protective factors, including demographic (e.g., sex, race), individual (e.g., substance use, mental health), and social (e.g., peer substance use) factors. Despite annual national surveys conducted, longitudinal studies examining markers of initiation and escalation of prescription opioid misuse (e.g., repeated overdoses, time to misuse) are lacking. Importantly, few evidence-based prevention or early intervention programs were identified. Future research should examine longitudinal trajectories of POM, as well as adaptation and implementation of promising prevention approaches.


Assuntos
Analgésicos Opioides/efeitos adversos , Transtornos Relacionados ao Uso de Opioides , Uso Indevido de Medicamentos sob Prescrição/prevenção & controle , Adolescente , Overdose de Drogas/prevenção & controle , Humanos , Masculino , Estados Unidos , Adulto Jovem
10.
Acad Pediatr ; 20(4): 565-568, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-31783181

RESUMO

Pediatric residents report lack of confidence in providing firearm safety anticipatory guidance. A self-paced online curriculum, including video demonstration of firearms, safe storage options, and counseling methods for families improved resident self-efficacy, confidence, and knowledge surrounding firearm injury prevention counseling.


Assuntos
Armas de Fogo , Ferimentos por Arma de Fogo , Criança , Aconselhamento , Currículo , Humanos , Internet , Segurança , Ferimentos por Arma de Fogo/prevenção & controle
11.
Health Aff (Millwood) ; 38(10): 1653-1661, 2019 10.
Artigo em Inglês | MEDLINE | ID: mdl-31589521

RESUMO

Firearm injuries are the second-leading cause of death for US children and adolescents (ages 1-18). This analysis quantified the federal dollars granted to research for the leading US causes of death for this age group in 2008-17. Several federal data sources were queried. On average, in the study period, $88 million per year was granted to research motor vehicle crashes, the leading cause of death in this age group. Cancer, the third-leading cause of mortality, received $335 million per year. In contrast, $12 million-only thirty-two grants, averaging $597 in research dollars per death-went to firearm injury prevention research among children and adolescents. According to a regression analysis, funding for pediatric firearm injury prevention was only 3.3 percent of what would be predicted by mortality burden, and that level of funding resulted in fewer scientific articles than predicted. A thirtyfold increase in firearm injury research funding focused on this age group, or at least $37 million per year, is needed for research funding to be commensurate with the mortality burden.


Assuntos
Acidentes de Trânsito/mortalidade , Causas de Morte/tendências , Financiamento Governamental/economia , Neoplasias/mortalidade , Pesquisa/economia , Ferimentos por Arma de Fogo/mortalidade , Adolescente , Criança , Pré-Escolar , Feminino , Armas de Fogo/estatística & dados numéricos , Homicídio , Humanos , Lactente , Recém-Nascido , Masculino , Fatores de Risco
12.
Acad Emerg Med ; 25(11): 1204-1215, 2018 11.
Artigo em Inglês | MEDLINE | ID: mdl-30381864

RESUMO

OBJECTIVES: Violence is one of the leading causes of death among youth ages 14 to 24. Hospital- and emergency department (ED)-based violence prevention programs are increasingly becoming a critical part of public health efforts; however, evaluation of prevention efforts is needed to create evidence-based best practices. Retention of study participants is key to evaluations, although little literature exists regarding optimizing follow-up methods for violently injured youth. This study aims to describe the methods for retention in youth violence studies and the characteristics of hard-to-reach participants. METHODS: The Flint Youth Injury (FYI) Study is a prospective study following a cohort of assault-injured, drug-using youth recruited in an urban ED, and a comparison population of drug-using youth seeking medical or non-violence-related injury care. Validated survey instruments were administered at baseline and four follow-up time points (6, 12, 18, and 24 months). Follow-up contacts used a variety of strategies and all attempts were coded by type and level of success. Regression analysis was used to predict contact difficulty and follow-up interview completion at 24 months. RESULTS: A total of 599 patients (ages 14-24) were recruited from the ED (mean ± SD age = 20.1 ± 2.4 years, 41.2% female, 58.2% African American), with follow-up rates at 6, 12, 18, and 24 months of 85.3%, 83.7% 84.2%, and 85.3%, respectively. Participant contact efforts ranged from two to 53 times per follow-up time frame to complete a follow-up appointment, and more than 20% of appointments were completed off site at community locations (e.g., participants' homes, jail/prison). Participants who were younger (p < 0.05) and female (p < 0.01) were more likely to complete their 24-month follow-up interview. Participants who sought care in the ED for assault injury (p < 0.05) and had a substance use disorder (p < 0.01) at baseline required fewer contact attempts to complete their 24-month follow-up, while participants reporting a fight within the immediate 3 months before their 24-month follow-up (p < 0.01) required more intensive contact efforts. CONCLUSIONS: The FYI study demonstrated that achieving high follow-up rates for a difficult-to-track, violently-injured ED population is feasible through the use of established contact strategies and a variety of interview locations. Results have implications for follow-up strategies planned as part of other violence prevention studies.


Assuntos
Vítimas de Crime/estatística & dados numéricos , Serviço Hospitalar de Emergência/estatística & dados numéricos , Transtornos Relacionados ao Uso de Substâncias/epidemiologia , Ferimentos e Lesões/epidemiologia , Adolescente , Adulto , Feminino , Seguimentos , Humanos , Estudos Longitudinais , Masculino , Estudos Prospectivos , Fatores de Risco , Transtornos Relacionados ao Uso de Substâncias/complicações , Inquéritos e Questionários , Violência/prevenção & controle , Violência/estatística & dados numéricos , Ferimentos e Lesões/complicações , Adulto Jovem
13.
Am J Prev Med ; 55(6): 812-821, 2018 12.
Artigo em Inglês | MEDLINE | ID: mdl-30344036

RESUMO

INTRODUCTION: Violence is a leading cause of morbidity and mortality for youth, with more than 600,000 emergency department visits annually for assault-related injuries. Risk for criminal justice involvement among this population is poorly understood. The objective of this study was to characterize arrests among high-risk, assault-injured, drug-using youth following emergency department treatment. METHODS: Youth (aged 18-24 years) with past 6-month drug use who were seeking emergency department treatment for either an assault or for non-violence reasons were enrolled (December 2009-September 2011) in a 2-year longitudinal study. Arrests in the 24 months following the emergency department visit were analyzed in 2016-2017 using survival analysis of objective Law Enforcement Information Network data. Hazard ratios quantifying the association between risk factors for arrest were estimated using Cox regression. RESULTS: In the longitudinal cohort, 511 youth seeking emergency department care (assault injury group n=299, comparison group n=212) were aged ≥18 years and were included for analysis. Youth in the assault injury group cohort had a 47% higher risk of arrest than the comparison group (38.1% vs 25.9%, RR=1.47, p<0.05). In unadjusted analyses, male sex, assault injury, binge drinking, drug use disorder, and community violence exposure were all associated with increased risk of arrest during the follow-up period. Cox regression identified that male sex (hazard ratio=2.57), drug use disorder diagnosis (hazard ratio=1.42), assault injury at baseline (hazard ratio=1.63), and community violence exposure (hazard ratio=1.35) increased risk for arrest. CONCLUSIONS: Drug-using assault-injured youth have high rates of arrest. Emergency department and community interventions addressing substance use and violence involvement may aid in decreasing negative violence and criminal justice outcomes among high-risk youth. TRIAL REGISTRATION: This study is registered at www.clinicaltrials.gov NCT01152970.


Assuntos
Crime/estatística & dados numéricos , Serviço Hospitalar de Emergência , Aplicação da Lei , Transtornos Relacionados ao Uso de Substâncias/epidemiologia , Violência/estatística & dados numéricos , Ferimentos e Lesões/epidemiologia , Adolescente , Feminino , Humanos , Estudos Longitudinais , Masculino , Fatores de Risco , Adulto Jovem
14.
J Urban Health ; 94(6): 776-779, 2017 12.
Artigo em Inglês | MEDLINE | ID: mdl-28409360

RESUMO

We describe the self-reported socioeconomic and health impacts, as well as the coping mechanisms employed by a drug-using cohort of adults during the Flint water crisis (FWC) in Flint, Michigan. Participants from an ongoing longitudinal Emergency Department study were contacted between April 2016 and July 2016 and completed a survey focusing on exposure, consequences, and coping strategies. One hundred thirty-three participants (mean age = 26, 65% African-American, 61% public assistance) completed the survey (37.9% response rate). Of these, 75% reported exposure to water with elevated lead levels. Of these, 75% reported additional monthly expenses resulting from exposure. Almost 40% of parents reported changes in their children's health and 65% reported changes to their health since the FWC. Participants indicated the use of both positive (e.g., advice from trusted neighbors, 99.0%) and negative coping mechanisms (e.g., increased substance use, 20.0%) in response to this public health emergency. High-risk Flint residents reported multiple social, economic, and health-related consequences stemming from the FWC. Policymakers should consider additional resources for those affected, including increased access to mental health to aid recovery within the community.


Assuntos
Desastres/estatística & dados numéricos , Saúde Ambiental/estatística & dados numéricos , Saúde Pública/estatística & dados numéricos , Abastecimento de Água/estatística & dados numéricos , Adaptação Psicológica , Adulto , Feminino , Nível de Saúde , Humanos , Estudos Longitudinais , Masculino , Michigan , Características de Residência , Autorrelato , Inquéritos e Questionários , Água
15.
J Exp Bot ; 68(7): 1569-1583, 2017 03 01.
Artigo em Inglês | MEDLINE | ID: mdl-28379423

RESUMO

The mechanisms linking C/N balance to N uptake and assimilation are central to plant responses to changing soil nutrient levels. Defoliation and subsequent regrowth of grasses both impact C partitioning, thereby creating a significant point of interaction with soil N availability. Using defoliation as an experimental treatment, we investigated the dynamic relationships between plant carbohydrate status and NO3--responsive uptake systems, transporter gene expression, and nitrate assimilation in Lolium perenne L. High- and low-affinity NO3- uptake was reduced in an N-dependent manner in response to a rapid and large shift in carbohydrate remobilization triggered by defoliation. This reduction in NO3- uptake was rescued by an exogenous glucose supplement, confirming the carbohydrate dependence of NO3- uptake. The regulation of NO3- uptake in response to the perturbation of the plant C/N ratio was associated with changes in expression of putative high- and low-affinity NO3- transporters. Furthermore, NO3- assimilation appears to be regulated by the C-N status of the plant, implying a mechanism that signals the availability of C metabolites for NO3- uptake and assimilation at the whole-plant level. We also show that cytokinins may be involved in the regulation of N acquisition and assimilation in response to the changing plant C/N ratio.


Assuntos
Metabolismo dos Carboidratos , Regulação da Expressão Gênica de Plantas , Lolium/genética , Lolium/metabolismo , Nitratos/metabolismo , Folhas de Planta/metabolismo , Proteínas de Plantas/genética , Lolium/crescimento & desenvolvimento , Nitrogênio/metabolismo , Proteínas de Plantas/metabolismo
16.
Ann Bot ; 119(8): 1353-1364, 2017 06 01.
Artigo em Inglês | MEDLINE | ID: mdl-28334245

RESUMO

Background and Aims: The efficiency of N assimilation in response to defoliation is a critical component of plant regrowth and forage production. The aim of this research was to test the effect of the internal C/N balance on NO3- assimilation and to estimate the associated cytokinin signals following defoliation of perennial ryegrass ( Lolium perenne L. 'Grasslands Nui') plants. Methods: Plants, manipulated to have contrasting internal N content and contrasting availability of water soluble carbohydrates (WSCs), were obtained by exposure to either continuous light or short days (8:16 h light-dark), and watered with modified N-free Hoagland medium containing either high (5 m m ) or low (50 µ m ) NO3- as sole N source. Half of the plants were defoliated and the root, sheath and leaf tissue were harvested at 8, 24 and 168 h after cutting. The spatiotemporal changes in WSCs, synthesis of amino acids and associated cytokinin content were recorded after cutting. Key Results: Leaf regrowth following defoliation involved changes in the low- and high-molecular weight WSCs. The extent of the changes and the partitioning of the WSC following defoliation were dependant on the initial WSC levels and the C and N availability. Cytokinin levels varied in the sheath and root as early as 8 h following defoliation and preceded an overall increase in amino acids at 24 h. Subsequently, negative feedback brought the amino acid response back towards pre-defoliation levels within 168 h after cutting, a response that was under control of the C/N ratio. Conclusions: WSC remobilization in the leaf is coordinated with N availability to the root, potentially via a systemic cytokinin signal, leading to efficient N assimilation in the leaf and the sheath tissues and to early leaf regrowth following defoliation.


Assuntos
Carbono/metabolismo , Citocininas/metabolismo , Lolium/metabolismo , Nitrogênio/metabolismo , Folhas de Planta/crescimento & desenvolvimento , Lolium/crescimento & desenvolvimento , Folhas de Planta/metabolismo , Raízes de Plantas/crescimento & desenvolvimento , Raízes de Plantas/metabolismo
17.
Funct Plant Biol ; 44(8): 832-844, 2017 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32480611

RESUMO

Root system architecture is the spatial arrangement of roots that impacts the capacity of plants to access nutrients and water. We employed pharmacologically generated morphological and molecular phenotypes and used in situ 15N isotope labelling, to investigate whether contrasting root traits are of functional interest in relation to nitrate acquisition. Brassica napus L. were grown in solidified phytogel culture media containing 1mM KNO3 and treated with the cytokinin, 6-benzylaminopurine, the cytokinin antagonist, PI-55, or both in combination. The pharmacological treatments inhibited root elongation relative to the control. The contrasting root traits induced by PI-55 and 6-benzylaminopurine were strongly related to 15N uptake rate. Large root proliferation led to greater 15N cumulative uptake rather than greater 15N uptake efficiency per unit root length, due to a systemic response in the plant. This relationship was associated with changes in C and N resource distribution between the shoot and root, and in expression of BnNRT2.1, a nitrate transporter. The root:shoot biomass ratio was positively correlated with 15N cumulative uptake, suggesting the functional utility of root investment for nutrient acquisition. These results demonstrate that root proliferation in response to external nitrate is a behaviour which integrates local N availability and the systemic N status of the plant.

18.
Acad Emerg Med ; 23(9): 1061-70, 2016 09.
Artigo em Inglês | MEDLINE | ID: mdl-27265097

RESUMO

BACKGROUND: Violent injury is the leading cause of death among urban youth. Emergency department (ED) visits represent an opportunity to deliver a brief intervention (BI) to reduce violence among youth seeking medical care in high-risk communities. OBJECTIVE: The objective was to determine the efficacy of a universally applied BI addressing violence behaviors among youth presenting to an urban ED. METHODS: ED youth (14 to 20 years old) seeking medical or injury-related care in a Level I ED (October 2011-March 2015) and screening positive for a home address within the intervention or comparison neighborhood of a larger youth violence project were enrolled in this quasi-experimental study. Based on home address, participants were assigned to receive either the 30-minute therapist-delivered BI (Project Sync) or a resource brochure (enhanced usual care [EUC] condition). The Project Sync BI combined motivational interviewing and cognitive skills training, including a review of participant goals, tailored feedback, decisional balance exercises, role-playing exercises, and linkage to community resources. Participants completed validated survey measures at baseline and a 2-month follow-up assessment. Main outcome measures included self-report of physical victimization, aggression, and self-efficacy to avoid fighting. Poisson and zero-inflated Poisson regression analyses analyzed the effects of the BI, compared to the EUC condition, on primary outcomes. RESULTS: A total of 409 eligible youth (82% participation) were enrolled and assigned to receive either the BI (n = 263) or the EUC condition (n = 146). Two-month follow-up was 91% (n = 373). There were no significant baseline differences between study conditions. Among the entire sample, mean (±SD) age was 17.7 (±1.9) years, 60% were female, 93% were African American, and 79% reported receipt of public assistance. Of participants, 9% presented for a violent injury, 9% reported recent firearm carriage, 20% reported recent alcohol use, and 39% reported recent marijuana use. Compared with the EUC group, participants in the therapist BI group showed self-reported reductions in frequency of violent aggression (therapist, -46.8%; EUC, -36.9%; incident rate ratio [IRR] = 0.87; 95% confidence interval [CI] = 0.76 to 0.99) and increased self-efficacy for avoiding fighting (therapist, +7.2%; EUC, -1.3%; IRR = 1.09; 95% CI = 1.02 to 1.15). No significant changes were noted for victimization. CONCLUSIONS: Among youth seeking ED care in a high-risk community, a brief, universally applied BI shows promise in increased self-efficacy for avoiding fighting and a decrease in the frequency of violent aggression.


Assuntos
Comportamento do Adolescente/psicologia , Vítimas de Crime/psicologia , Entrevista Motivacional , População Urbana/estatística & dados numéricos , Violência/psicologia , Adolescente , Feminino , Humanos , Masculino , Autoeficácia , Inquéritos e Questionários , Violência/estatística & dados numéricos , Adulto Jovem
19.
J Trauma Acute Care Surg ; 81(1): 149-55, 2016 07.
Artigo em Inglês | MEDLINE | ID: mdl-27120317

RESUMO

BACKGROUND: While the relationship between underage drinking and injury has been well established, few studies have examined whether presenting for an acute injury moderates the efficacy of a brief intervention (BI) on alcohol misuse. METHODS: Patients (aged 14-20 years) in the emergency department screening positive for risky drinking (Alcohol Use Disorders Identification Test-Consumption score) completed a baseline assessment, were randomized to conditions (a standalone computer-delivered BI [n = 277], a therapist-delivered BI [n = 278], or a control condition [n = 281]), and completed a 3-month follow-up. This secondary analysis of Project U-Connect examined regression models (controlling for baseline values) to examine the main effects of injury and the interaction effects of injury by BI condition on alcohol consumption and consequences. RESULTS: Among 836 youth enrolled in the randomized controlled trial (mean age, 18.6 years; 51.6% were male; 79.4% were white), 303 (36.2%) had a primary complaint of intentional or unintentional injury. At baseline, injured patients were more likely to be male (p < 0.001) and have higher alcohol consumption (p < 0.01), but were less likely to misuse prescription drugs (p = 0.02) than those presenting for medical reasons. Regression models (controlling for baseline values) demonstrated that injury presentation predicted greater alcohol consumption prior to a BI. The computer BI was more effective at reducing alcohol consequences among those presenting with injury than those presenting for other reasons. Injury did not affect the efficacy of the computer BI on alcohol consumption, and injury did not affect the efficacy of the therapist BI on alcohol outcomes. CONCLUSIONS: A therapist or computer BI reduced alcohol consumption and consequences among risky drinkers regardless of reason for emergency department presentation highlighting the opportunity to reach a broad array of youth. Although the therapist BI was not moderated by injury presentation, the computer BI was particularly effective at reducing alcohol consequences among those presenting with injury at 3-month follow-up. LEVEL OF EVIDENCE: Therapeutic/care management study, level III.


Assuntos
Consumo de Álcool por Menores/prevenção & controle , Ferimentos e Lesões/epidemiologia , Adolescente , Comportamento do Adolescente , Dirigir sob a Influência/prevenção & controle , Serviço Hospitalar de Emergência , Feminino , Humanos , Masculino , Michigan/epidemiologia , Fatores de Risco , Inquéritos e Questionários , Adulto Jovem
20.
Prev Sci ; 17(2): 167-76, 2016 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-26572898

RESUMO

Since 2011, the CDC-funded Michigan Youth Violence Prevention Center (MI-YVPC), working with community partners, has implemented a comprehensive prevention approach to reducing youth violence in Flint, MI, based on public health principles. MI-YVPC employed an intervention strategy that capitalizes on existing community resources and application of evidence-based programs using a social-ecological approach to change. We evaluated the combined effect of six programs in reducing assaults and injury among 10-24 year olds in the intervention area relative to a matched comparison community. We used generalized linear mixed models to examine change in the intervention area counts of reported assault offenses and assault injury presentation relative to the comparison area over a period 6 years prior- and 30 months post-intervention. Results indicated that youth victimization and assault injuries fell in the intervention area subsequent to the initiation of the interventions and that these reductions were sustained over time. Our evaluation demonstrated that a comprehensive multi-level approach can be effective for reducing youth violence and injury.


Assuntos
Promoção da Saúde/organização & administração , Violência/prevenção & controle , Ferimentos e Lesões/prevenção & controle , Adolescente , Adulto , Criança , Feminino , Humanos , Masculino , Michigan , Distribuição de Poisson , Adulto Jovem
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