16 results on '"Lindsay Matthews"'
Search Results
2. Climate services for tourism: Insights from Caribbean Small Island Developing States
- Author
-
Ravidya Burrowes, Adrian R. Trotman, Cedric J. Van Meerbeeck, Amanda Charles, Jodi-Ann Petrie, Lindsay Matthews, Roché Mahon, and Jimena Eyzaguirre
- Subjects
Climate services ,Small Island Developing States ,Caribbean ,H1-99 ,Atmospheric Science ,Global and Planetary Change ,Relationship building ,Private sector ,Tourism ,Social sciences (General) ,Global Framework for Climate Services ,Climate adaptation ,Meteorology. Climatology ,Business ,QC851-999 ,Climate risk management ,Environmental planning - Abstract
Peer reviewed literature on the availability and use of climate services in the operations and management of tourism is scarce. Using a multi-method approach, we provide insights on both basic and specialised climate information utilised by a range of public and private sector tourism decision-makers in the most tourism-dependent region in the world - the Caribbean. We also examined whether existing climate information meets tourism destination planning, marketing and operational decision-making needs and how the tourism industry could more effectively and efficiently integrate climate information to enhance sector performance. Results from research with 47 Caribbean hoteliers and tourism policy-makers show that short-term destination and source market weather information are widely consulted, but the use of historical climate information and longer-term climate forecasts is comparatively lower. There are few tailored climate information products and services, and uptake of the few that exist is low. Current climate information inadequately fulfills decision-makers’ needs due to a number of challenges, including a short history of engagement between the climate and tourism communities, along with a partial understanding of the needs and preferences of tourism stakeholders. Evidence suggests that a new generation of specialised climate information products can enhance climate risk management amongst tourism suppliers. Further research and relationship building will be needed to support the co-production and uptake of tailored climate information for the Caribbean tourism sector. Tourism-dependent Small Island Developing States in other regions interested in pursuing climate services for tourism can learn from the experience and approach used in the Caribbean.
- Published
- 2021
3. Development of a data-driven weather index for beach parks tourism
- Author
-
Lindsay Matthews, Daniel Scott, and Jean Andrey
- Subjects
Atmospheric Science ,Index (economics) ,010504 meteorology & atmospheric sciences ,Climate ,Health, Toxicology and Mutagenesis ,Cloud cover ,Weather and climate ,Wind ,01 natural sciences ,Wind speed ,Tourism ,03 medical and health sciences ,0302 clinical medicine ,Humans ,Weather ,0105 earth and related environmental sciences ,Ontario ,030203 arthritis & rheumatology ,Ecology ,business.industry ,Visitor pattern ,Environmental resource management ,Thermal comfort ,Weighting ,Geography ,business - Abstract
The complexity of the human-environment interface predicates the need for tools and techniques that can enable the effective translation of weather and climate products into decision-relevant information. Indices are a category of such tools that may be used to simplify multi-faceted climate information for economic and other decision-making. Climate indices for tourism have been popularized in the literature over the past three decades, but despite their prevalence, these indices have a number of limitations, including coarse temporal resolution, subjective rating and weighting schemes, and lack of empirical validation. This paper critically assesses the design of the tourism climate index, the holiday climate index-beach, and a new, mathematically optimized index developed for the unique contextual realities of Great Lakes beach tourism. This new methodology combines the use of expert knowledge, stated visitor preferences, and mathematical optimization to develop an index that assigns daily weather scores based on four weather sub-indices (thermal comfort, wind speed, precipitation, and cloud cover). These daily scores are then averaged to the monthly level and correlated to visitation data at two beach parks in Ontario (Canada). This optimized index demonstrates a strong fit (R2 = 0.734, 0.657) with observed visitation at Pinery Provincial Park and Sandbanks Provincial Park, outperforming both the tourism climate index (R2 = 0.474, 0.018) and the holiday climate index-beach (R2 = 0.668, 0.427). This study advances our understanding of the magnitude and seasonality of weather impact on beach tourist visitation and can inform decision-making of tourism marketers and destination managers.
- Published
- 2019
- Full Text
- View/download PDF
4. The development of climate services to inform decisions about winter maintenance at different timescales
- Author
-
Christopher G. Fletcher, Yaasiin Oozeer, Lindsay Matthews, and Jean Andrey
- Subjects
Atmospheric Science ,Canada ,Index (economics) ,010504 meteorology & atmospheric sciences ,Winter road maintenance ,Translation service ,0207 environmental engineering ,Climate change ,Transportation ,02 engineering and technology ,Climate science ,01 natural sciences ,Meteorology. Climatology ,020701 environmental engineering ,Climate services ,0105 earth and related environmental sciences ,H1-99 ,Global and Planetary Change ,business.industry ,Environmental resource management ,Snow ,Social sciences (General) ,Geography ,Winter maintenance ,QC851-999 ,business ,Winter severity index ,Winter weather - Abstract
Snow and ice control programs are critical for the efficiency and safety of transportation systems in all winter climates. Tools that help road authorities plan for, assess, and communicate the relationship between climate and winter road maintenance (WRM) activities are needed. There is increasing evidence that the development of such Climate Services (CS) tools is an iterative, evolving, and long-term process between the producers and users of this climate information, which increases the usability and application of climate science. This paper presents a case study describing the co-production of a climate translation service for a Canadian road authority. The purpose of this study is to: 1) refine an existing Winter Severity Index (WSI) to better understand how winter weather translates into inter-annual variations in WRM activities using publicly available data; 2) apply the index to historical weather observations to assess the magnitude and significance of historical winter weather trends, and 3) apply the index to modelled climate data to project the impacts of climate change on WRM operations in Ontario, Canada. Results indicate that the WSI for Ontario highways has strong fit with maintenance activity, when measured as equipment-hours. Analysis of WRM trends over more than three decades shows that winter severity has increased in some areas and decreased in others. The climate change analysis reveals that winters will experience a reduction in winter severity into the coming century.
- Published
- 2021
5. Planning for Winter Road Maintenance in the Context of Climate Change
- Author
-
Ian M. Picketts, Lindsay Matthews, and Jean Andrey
- Subjects
Strategic planning ,050210 logistics & transportation ,Atmospheric Science ,Global and Planetary Change ,010504 meteorology & atmospheric sciences ,business.industry ,05 social sciences ,Environmental resource management ,Climate change ,Context (language use) ,Future climate ,Snow ,01 natural sciences ,Climatology ,0502 economics and business ,Environmental science ,business ,Social Sciences (miscellaneous) ,0105 earth and related environmental sciences ,Winter weather - Abstract
Winter weather creates mobility challenges for most northern jurisdictions, leading to significant expenditures on winter road maintenance (WRM) activities. While the science and practice of snow and ice control is continually evolving, climate change presents particular challenges for the strategic planning of WRM. The purpose of this study is 1) to develop a winter severity index (WSI) to better understand how winter weather translates into interannual variations in WRM activities and 2) to apply the WSI to future climate change projections to assist a northern community in preparing for climate change. A new method for creating a WSI model is explored, using readily available data from maintenance records and meteorological stations. The WSI is created by optimizing values for three levels of snowfall as well as potential icing events and is shown to have high predictive accuracy for WRM (coefficient of determination R2 of 0.93). The WSI is then applied to historic and future climate data in a municipality located in central British Columbia, Canada. Findings reveal that much of the variability in WRM can be attributed to weather. The results of the climate change analysis show that winter precipitation in the region is expected to increase by 5.2%–12.3%, and winter average temperatures are projected to increase by 1.5°–2.8°C in the 2050s, compared to the 1976–2000 baseline based on 65 GCMs. Based on the midrange (25th to 75th percentiles) of the 65 GCM projections, annual demand for WRM activities is estimated to decrease by 13.0%–22.0%.
- Published
- 2017
- Full Text
- View/download PDF
6. NCI Awardee Skills Development Consortium (NASDC): Applicant profiles
- Author
-
Claire F. Verschraegen, Jeannette F. Korczak, Lindsay Matthews, Romina Rodriguez, Rebecca D. Jackson, Cauleen Noel, Ann A. O'Connell, Miryam Yusufov, Ushma S. Neill, Elizabeth O. Hexner, David A. Mankoff, William F. Pirl, Mia Hashibe, Madeline Romney, Tamryn F. Gray, and Iness Jedidi
- Subjects
Academic career ,Cancer Research ,Medical education ,medicine.medical_specialty ,Socioemotional selectivity theory ,business.industry ,Public health ,Assistant professor ,Health equity ,Oncology ,Health care ,Medicine ,Social media ,Working group ,business - Abstract
11030 Background: In 2020, the NCI funded a new educational consortium, NASDC (NCI Awardee Skills Development Consortium, RFA-CA-19-010 and -011), through four institutionally granted UE5 awards to deliver a specific course each and a U24 award as a Coordinating Center. The goal is to teach current early-career faculty NCI grantees skills in areas critical for successful independent academic cancer research careers. Courses focus on leadership and socioemotional skills, health disparities, immuno-oncology, and cell and gene therapy. Teaching will initially be virtual, given the COVID pandemic. Methods: A steering committee and four working groups were established to build the consortium infrastructure, including the NASDC (osu.edu) website. Clientele are early-career faculty PD/PI of a current NCI-funded grant (K01, K07, K08, K22, K23, K25, R00, R21, DP1, DP2, DP5, R01, R23, R29, R37, R56, RF1, RL1, U01), of whom 454 were directly contacted. Blast emails and social media were also used. We are reporting the characteristics of 154 applicants, who completed the RedCap application online. Results: 85% of the applicants are within the first 5 years of a faculty appointment, 87% at the assistant professor rank, and 65% on tenure track. 40% hold an M.D. degree and 72% a Ph.D. 81% are US citizens, 52% females, and 45/33/16/2/4%-11% are White/Asian/Black/Native Americans/Other–Hispanics/Latino. 76% work at NCI-designated comprehensive cancer centers. Mean protected research time is 80%. Non-mutually exclusive fields of research interest are therapeutics (46%), basic science (37%), disparities (34%) prevention (32%), public health (28%), and pediatrics (10%). 66% have received a K-award grant, 13% each an R21 or R00, and 3% an R01. Additionally, 35% had a second NCI grant as PI, 10% a third grant, and 60% had non-NCI grants. Reasons for applying included (1) not quite ready to lead a research team (42%), (2) need for stronger career mentoring (37%), and (3) not being fully confident in research skills (21%). Conclusions: Applicants to the new NCI educational consortium (NASDC) have a successful start to their academic career with a third having obtained more than one NCI award. Most applicants work at NCI-designated comprehensive cancer centers. As cancer research continues to evolve and has the potential to address critical health care needs of the nation, NASDC will strive to equip scientists to be leaders, teach advances in technology, and impart confidence in research skills.
- Published
- 2021
- Full Text
- View/download PDF
7. Do we have a car for you? Encouraging the uptake of electric vehicles at point of sale
- Author
-
Tania Del Matto, Manuel Riemer, Lindsay Matthews, Nicholas Cloet, and Jennifer Lynes
- Subjects
Government ,business.product_category ,Point of sale ,020209 energy ,Advertising ,02 engineering and technology ,010501 environmental sciences ,Management, Monitoring, Policy and Law ,computer.software_genre ,01 natural sciences ,Intermediary ,General Energy ,Work (electrical) ,Critical success factor ,Electric vehicle ,0202 electrical engineering, electronic engineering, information engineering ,Mystery shopping ,Business ,Marketing ,computer ,Consumer behaviour ,0105 earth and related environmental sciences - Abstract
This study investigates shopping experiences at dealerships selling electric vehicles (EVs) in Ontario, Canada. In 2014, twenty mystery shoppers were trained and sent into 24 EV-certified dealerships (with a total of 95 shopping experiences) to observe the sales approach towards EVs. Results show that a common barrier for shoppers is the unavailability of EVs at the dealership – including a lack of EV models on site to view or test-drive as well as a three- to four-month waiting period to receive the vehicle once ordered. A multiple regression model was developed to explore which factors influence the likelihood of deciding to purchase an EV. Findings suggest that, controlling for brand, the key success factors are a salesperson's positive attitude and the availability of an EV on site. It is important for future policy makers to acknowledge the influential role of market intermediaries, such as dealerships, in the adoption of EVs. The research findings demonstrate a potential for government agencies to work with dealerships and/or salespeople to improve EV uptake by encouraging the presence of floor models and vehicles for test-driving on site, and by increasing the accuracy of information being provided to customers.
- Published
- 2017
- Full Text
- View/download PDF
8. The use of Facebook for information seeking, decision support, and self-organization following a significant disaster
- Author
-
Amber Silver and Lindsay Matthews
- Subjects
Self-organization ,021110 strategic, defence & security studies ,Decision support system ,Information seeking ,business.industry ,Communication ,05 social sciences ,0211 other engineering and technologies ,050801 communication & media studies ,02 engineering and technology ,Library and Information Sciences ,Public relations ,Public attention ,0508 media and communications ,Content analysis ,The Internet ,Social media ,Tornado ,Psychology ,business ,Social psychology - Abstract
The wide-spread proliferation of the Internet has revolutionized the ways that individuals obtain, interpret, and respond to information in the aftermath of disaster. An F3 tornado that impacted th...
- Published
- 2016
- Full Text
- View/download PDF
9. Simtuzumab treatment of advanced liver fibrosis in HIV and HCV-infected adults: results of a 6-month open-label safety trial
- Author
-
Kimmo Virtaneva, Caryn G. Morse, Ahmed M. Gharib, Lindsay Matthews, Joseph A. Kovacs, Craig Martens, Elliot Levy, Bittoo Kanwar, Ralph Sinkus, Robert P. Myers, Mary Ann McLaughlin, Colleen Hadigan, Zachary Goodman, Dan E. Sturdevant, Eric G. Meissner, David E. Kleiner, Shyam Kottilil, Bradford J. Wood, Mani Subramanian, Stephen F. Porcella, Henry Masur, and Theo Heller
- Subjects
Adult ,Liver Cirrhosis ,Male ,0301 basic medicine ,Pathology ,medicine.medical_specialty ,Hepatitis C virus ,HIV Infections ,Antibodies, Monoclonal, Humanized ,medicine.disease_cause ,Gastroenterology ,Article ,03 medical and health sciences ,Liver disease ,Transforming Growth Factor beta3 ,0302 clinical medicine ,Fibrosis ,Internal medicine ,medicine ,Humans ,Adverse effect ,Maryland ,Hepatology ,medicine.diagnostic_test ,Coinfection ,business.industry ,Hepatitis C, Chronic ,Middle Aged ,medicine.disease ,Portal Pressure ,Interleukin-10 ,Clinical trial ,Treatment Outcome ,030104 developmental biology ,Liver ,Tolerability ,Simtuzumab ,Liver biopsy ,Disease Progression ,Administration, Intravenous ,Female ,030211 gastroenterology & hepatology ,business - Abstract
Background Chronic liver injury can result in fibrosis that may progress over years to end-stage liver disease. The most effective anti-fibrotic therapy is treatment of the underlying disease, however when not possible, interventions to reverse or slow fibrosis progression are needed. Aim The aim of this study was to study the safety and tolerability of simtuzumab, a monoclonal antibody directed against lysyl oxidase-like 2 (LOXL2) enzyme, in subjects with hepatitis C virus (HCV), human immunodeficiency virus (HIV), or HCV-HIV co-infection and advanced liver disease. Methods Eighteen subjects with advanced liver fibrosis received simtuzumab 700 mg intravenously every 2 weeks for 22 weeks. Transjugular liver biopsies were performed during screening and at the end of treatment to measure hepatic venous pressure gradient (HVPG) and to stage fibrosis. Results Treatment was well-tolerated with no discontinuations due to adverse events. No significant changes were seen in HVPG or liver biopsy fibrosis score after treatment. Exploratory transcriptional and protein profiling using paired pre- and post-treatment liver biopsy and serum samples suggested up-regulation of TGF-β3 and IL-10 pathways with treatment. Conclusion In this open-label, pilot clinical trial, simtuzumab treatment was well-tolerated in HCV- and HIV-infected subjects with advanced liver disease. Putative modulation of TGF-β3 and IL-10 pathways during simtuzumab treatment merits investigation in future trials.
- Published
- 2016
- Full Text
- View/download PDF
10. Sa1770 PREDICTORS OF MYCHART® MESSAGING USE IN AN INFLAMMATORY BOWEL DISEASE POPULATION
- Author
-
Wen-Jan Tuan, Sumona Saha, Megan Lutz, and Lindsay Matthews
- Subjects
medicine.medical_specialty ,education.field_of_study ,Hepatology ,business.industry ,Internal medicine ,Population ,Gastroenterology ,medicine ,medicine.disease ,education ,business ,Inflammatory bowel disease - Published
- 2020
- Full Text
- View/download PDF
11. Climate change adaptation strategies for transportation infrastructure in Prince George, Canada
- Author
-
Stephen J. Déry, Lindsay Matthews, Ian M. Picketts, Jean Andrey, and Susan L. Tighe
- Subjects
Global and Planetary Change ,010504 meteorology & atmospheric sciences ,Climate change ,Plan (drawing) ,010501 environmental sciences ,01 natural sciences ,Work (electrical) ,Environmental protection ,Local government ,George (robot) ,Business ,Climate change adaptation ,Adaptation (computer science) ,Transportation infrastructure ,Environmental planning ,0105 earth and related environmental sciences - Abstract
Transport infrastructure is particularly vulnerable to climate impacts as it is designed for long operational lives, and both episodic and seasonal conditions contribute to deterioration, disruption and unsafe incidents. There are some examples of adaptation in transportation design, but many communities do not have the capacity to incorporate climate change considerations into infrastructure planning and management. Researchers worked closely with the City of Prince George, in Central British Columbia, Canada, to build on existing work and explore how the City could plan, design, and maintain roads and other structures to account for climate change. A local steering committee was formed, and created and evaluated 23 potential research topics. Two focus areas were selected for further investigation and explored during a workshop with practitioners, researchers, consultants and other representatives. The workshop precipitated an investigation of projected impacts of climate change on road maintenance and road safety, and plans to explore alternative paving techniques. Outcomes of the case study provide insights regarding climate change and local transportation infrastructure, including: how researchers can engage with local experts to explore adaptation; issues local governments perceive as important; and barriers communities face as they attempt to address vulnerabilities.
- Published
- 2015
- Full Text
- View/download PDF
12. Using vehicle monitoring technology and eco-driver training to reduce fuel use and emissions in tourism: a ski resort case study
- Author
-
Michelle Rutty, Daniel Scott, Lindsay Matthews, and Tania Del Matto
- Subjects
media_common.quotation_subject ,Geography, Planning and Development ,Environmental economics ,Training (civil) ,Capital expenditure ,Tourism, Leisure and Hospitality Management ,Sustainability ,Fuel efficiency ,Business ,Prosperity ,Tourism ,Externality ,Ski resort ,media_common - Abstract
Ground-based transport moves more tourists than any other form of transportation and contributes c. 32% of tourism's carbon dioxide (CO2) emissions – yet remains a largely neglected area of emission/carbon management research. This study examines the value of vehicle monitoring technology (VMT) and eco-driver training as a means to improve fuel efficiency and reduce CO2 emissions for a fleet of vehicles at the largest ski resort operation in Ontario, Canada. The VMT was installed in 14 fleet vehicles. After eco-driver training, the fleet reduced its average daily speed (−14%), hard decelerations (−55%), hard accelerations (−44%), and idling time (−2%), resulting in decreased fuel costs (−8%) and CO2 emissions (−8%). The process requires very low capital expenditures, can pay for itself in as little as one year, and has safety paybacks. It also has valuable externalities: tourism businesses that instill sustainability awareness and values to their employees contribute to environmental prosperity generally,...
- Published
- 2013
- Full Text
- View/download PDF
13. Eco-driver training within the City of Calgary’s municipal fleet: Monitoring the impact
- Author
-
Michelle Rutty, Jean Andrey, Lindsay Matthews, and Tania Del Matto
- Subjects
Engineering ,business.industry ,Fossil fuel ,Training (meteorology) ,Climate change ,Poison control ,Transportation ,Environmental economics ,Research process ,Transport engineering ,Strategic business unit ,Greenhouse gas ,Environmental impact assessment ,business ,General Environmental Science ,Civil and Structural Engineering - Abstract
This article highlights eco-driving as an available policy option to reduce climate altering GHG emissions. Recognizing the need to reduce the environmental impact of its fleet operations, the City of Calgary is a leader in developing programs and policies that aim to reduce GHG emissions and associated pollutants resulting from the use of fossil fuels. Among local action taken against climate change, the City sought to quantify CO2 emissions reductions from their municipal fleet as a result of eco-driver training, with a specific focus on engine idling. Fifteen drivers from the Development & Building Approvals Business Unit had in-vehicle monitoring technology (CarChips®) installed into their vehicles as part of a three-phase research process. The results show that gasoline and hybrid vehicles decreased average idling between 4% and 10% per vehicle per day, leading to an average emissions decrease of 1.7 kg of CO2 per vehicle per day.
- Published
- 2013
- Full Text
- View/download PDF
14. The Association Between Post-traumatic Stress Disorder and Markers of Inflammation and Immune Activation in HIV-Infected Individuals With Controlled Viremia
- Author
-
Caryn G. Morse, Sally Steinbach, Joseph Snow, Bryan Smith, Rebecca Krakora, Sungyoung Auh, Diana Nora, Lindsay Matthews, Suad Kapetanovic, Peter Siyahhan Julnes, Avindra Nath, and Keenan Withers
- Subjects
0301 basic medicine ,Adult ,Male ,medicine.medical_specialty ,Neutrophils ,HIV Infections ,CD8-Positive T-Lymphocytes ,medicine.disease_cause ,White People ,Article ,Stress Disorders, Post-Traumatic ,03 medical and health sciences ,Leukocyte Count ,0302 clinical medicine ,Arts and Humanities (miscellaneous) ,Internal medicine ,White blood cell ,Antiretroviral Therapy, Highly Active ,Surveys and Questionnaires ,medicine ,Prevalence ,Humans ,Applied Psychology ,Inflammation ,biology ,business.industry ,C-reactive protein ,Smoking ,Case-control study ,Immune dysregulation ,Middle Aged ,Viral Load ,030112 virology ,Black or African American ,Psychiatry and Mental health ,medicine.anatomical_structure ,C-Reactive Protein ,Case-Control Studies ,Cohort ,Immunology ,Absolute neutrophil count ,biology.protein ,Female ,business ,Viral load ,030217 neurology & neurosurgery ,Biomarkers ,Blood drawing - Abstract
Background Post-traumatic stress disorder (PTSD) may be associated with chronic immune dysregulation and a proinflammatory state. Among HIV-infected individuals, PTSD is associated with greater morbidity and mortality, but the association with immune dysfunction has not been evaluated. This study explores the association between PTSD and selected markers of inflammation and immune activation in a cohort of HIV-infected, virally-suppressed individuals. Methods HIV-infected adults who were virologically controlled on antiretroviral medications were recruited through a screening protocol for studies of HIV-related neurocognitive disorders. Each participant underwent blood draws, urine toxicology screen, and completed the Client Diagnostic Questionnaire, a semistructured psychiatric interview. Results Of 114 eligible volunteers, 72 (63%) were male, 77 (68%) African American, and 34 (30%) participants met criteria for PTSD. Participants with PTSD were more likely to be current smokers (79%) than those without (60%) ( p = 0.05). The PTSD cohort had significantly higher total white blood cell counts (5318 and 6404 cells/uL, p = 0.03), absolute neutrophil count (2767 and 3577 cells/uL, p = 0.02), CD8% (43 and 48, p = 0.05), and memory CD8% (70 and 78%, p = 0.04); lower naive CD8% (30 and 22%, p = 0.04) and higher rate of high-sensitivity C-reactive protein >3mg/L (29 and 20, p = 0.03). Discussion A high prevalence of PTSD was identified in this cohort of HIV-infected adults who were virally suppressed. These results suggest that PTSD may be associated with immune dysregulation even among antiretroviral therapy-adherent HIV-infected individuals.
- Published
- 2016
15. Nonalcoholic Steatohepatitis and Hepatic Fibrosis in HIV-1-Monoinfected Adults With Elevated Aminotransferase Levels on Antiretroviral Therapy
- Author
-
Abigail Orenstein, Colleen Hadigan, Theo Heller, Caryn G. Morse, Ahmed M. Gharib, Lindsay Matthews, Michael A. Proschan, Mary McLaughlin, Mones Abu-Asab, Francine Thomas, Xiaojun Hu, Richard A. Lempicki, Ronald E. Engle, David E. Kleiner, and Joseph A. Kovacs
- Subjects
Adult ,Liver Cirrhosis ,Male ,Microbiology (medical) ,Pathology ,medicine.medical_specialty ,Adolescent ,Biopsy ,HIV Infections ,Gastroenterology ,Cohort Studies ,Young Adult ,Liver disease ,Non-alcoholic Fatty Liver Disease ,Antiretroviral Therapy, Highly Active ,Internal medicine ,Nonalcoholic fatty liver disease ,Prevalence ,medicine ,Humans ,Transaminases ,Immunodeficiency ,Aged ,medicine.diagnostic_test ,Histocytochemistry ,business.industry ,Middle Aged ,Hepatitis B ,medicine.disease ,Infectious Diseases ,Anti-Retroviral Agents ,Liver ,Liver biopsy ,Coinfection ,Female ,Steatohepatitis ,Viral hepatitis ,business ,Blood Chemical Analysis - Abstract
(See the Editorial Commentary by Crum-Cianflone on pages 1579–81.) Aminotransferase elevations are common in human immunodeficiency virus (HIV)–infected patients, occurring in 20%–60% of patients on antiretroviral therapy (ART), even in the absence of viral hepatitis coinfection [1–3]. Causes of hepatotoxicity in HIV-infected adults include coinfection with hepatitis B or C, alcohol abuse, nonalcoholic fatty liver disease (NAFLD), and medication, including antiretroviral, toxicity. A possible contribution to chronic liver injury by HIV infection itself or the associated immunodeficiency is controversial [4, 5]. Prior studies in HIV-monoinfected patients with aminotransferase elevations suggest a high prevalence of clinically significant liver disease, including nonalcoholic steatohepatitis (NASH) and hepatic fibrosis [6, 7]. Patients with aminotransferase elevations require additional visits for laboratory studies and clinical assessments, and often undergo interruptions and changes in ART [8]. However, the impact of chronic aminotransferase elevations, and any related liver damage, on morbidity and mortality has not been well defined [9, 10]. As a consequence, at present there are no established guidelines as to when ART should be changed or discontinued in the setting of mild to moderate aminotransferase elevations. After evaluation for viral hepatitis and other reversible causes of liver enzyme elevations, most clinicians elect to monitor these elevations, given their uncertain clinical significance. To better understand the clinical and pathologic correlates of chronic aminotransferase elevations in HIV-infected adults receiving ART and without evidence of chronic viral hepatitis, such patients were prospectively enrolled in a cross-sectional study to examine the prevalence and clinical correlates of antiretroviral-associated liver disease, including steatosis, steatohepatitis, and fibrosis.
- Published
- 2015
- Full Text
- View/download PDF
16. Sa1006 Noninvasive Measures of Severity in Chronic Liver Disease, Moving Beyond Fibrosis
- Author
-
Ahmed M. Gharib, Lindsay Matthews, Caryn G. Morse, Bittoo Kanwar, Matthew S. Paulson, Christopher Koh, Bisharah S. Rizvi, Theo Heller, Mary Ann McLaughlin, Eric G. Meissner, G.M. Subramanian, Ma Ai Thanda Han, Xiongce Zhao, David E. Kleiner, Shyam Kottilil, and Ralph Sinkus
- Subjects
medicine.medical_specialty ,Hepatology ,Fibrosis ,business.industry ,Internal medicine ,Gastroenterology ,medicine ,medicine.disease ,Chronic liver disease ,business - Published
- 2015
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.