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Gaur U, Sealy W, Bharatha A, Sobers NP, Krishnamurthy K, Campbell MH, Cumberbatch C, Drakes M, Gibbs M, Alexander C, Harewood H, Adams OP, Gupta S, Parsa AD, Kabir R, Majumder MAA. Knowledge, Attitudes, and Practices of Hand Hygiene, Mask Use, and Social Distancing among Public Hospital and Polyclinic Nurses in Barbados during the Coronavirus 2019 Pandemic. Epidemiologia (Basel) 2024; 5:122-136. [PMID: 38534805 DOI: 10.3390/epidemiologia5010008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 03/01/2024] [Accepted: 03/04/2024] [Indexed: 03/28/2024] Open
Abstract
BACKGROUND Nurses are essential members of the healthcare workforce and were among the first-line carers for patients in community and hospital settings during the COVID-19 pandemic. As a result, they were at a heightened risk of infection, resulting in several reported deaths among nursing staff. Several preventive measures were adopted to contain the spread of the COVID-19 virus. This study aims to explore the knowledge, attitudes, and practices (KAP) of nurses regarding hand hygiene, mask wearing, and social distancing measures in healthcare settings in Barbados during the COVID-19 pandemic. METHOD An online survey of nurses working in public hospitals and polyclinics (public primary care clinics) in Barbados from March 2021 to December 2021 was conducted. A nonsystematic convenience sampling method was employed to recruit nurses who were readily available and willing to participate. A questionnaire captured the sociodemographic information and knowledge and practices related to hand hygiene, the use of face masks, and social distancing. Each correct response received one mark. Overall knowledge scores were categorized as poor (<60%), average (60-80%), or good (>80-100%). RESULTS Of the 192 participants, the majority were female (82.8%) and had >5 years of experience (82%). The findings revealed that 45.8% had poor knowledge of hand hygiene, and that the knowledge of 43.8% of respondents was average. Multivariable logistic regression showed that, after adjustment for age and gender, registered nurses had 2.1 times increased odds (95% confidence interval 1.0, 4.2) of having good knowledge compared to other nursing categories. Regarding mask wearing, 53.6% of nurses had average knowledge, and 27.1% had good knowledge. Multivariable logistic regression showed that, after adjustment for age and gender, registered nurses had 3.3 times increased odds (95% confidence interval 1.5, 7.4) of having good knowledge compared to nursing assistants. A total of 68.6% of respondents followed the correct steps of handwashing every time, and 98.3% wore a mask in public places. More than half of the nurses (51.2%) kept a safe distance from others to avoid spreading SARS-CoV-2; one-third were in a crowded place(s) in the past three months, and 55.8% usually followed guidelines for social isolation as recommended by the WHO. CONCLUSIONS The study identified knowledge deficiencies related to hand hygiene and wearing masks among nurses. It is imperative to provide additional training on infection control measures.
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Affiliation(s)
- Uma Gaur
- Faculty of Medical Sciences, The University of the West Indies, Cave Hill Campus, Bridgetown BB11000, Barbados
| | - Wendy Sealy
- Faculty of Medical Sciences, The University of the West Indies, Cave Hill Campus, Bridgetown BB11000, Barbados
| | - Ambadasu Bharatha
- Faculty of Medical Sciences, The University of the West Indies, Cave Hill Campus, Bridgetown BB11000, Barbados
| | - Natasha P Sobers
- George Alleyne Chronic Disease Research Centre, The University of the West Indies, Cave Hill Campus, Bridgetown BB11000, Barbados
| | - Kandamaran Krishnamurthy
- Faculty of Medical Sciences, The University of the West Indies, Cave Hill Campus, Bridgetown BB11000, Barbados
| | - Michael H Campbell
- Faculty of Medical Sciences, The University of the West Indies, Cave Hill Campus, Bridgetown BB11000, Barbados
| | - Cara Cumberbatch
- Faculty of Medical Sciences, The University of the West Indies, Cave Hill Campus, Bridgetown BB11000, Barbados
| | - Maia Drakes
- Faculty of Medical Sciences, The University of the West Indies, Cave Hill Campus, Bridgetown BB11000, Barbados
| | - Marielle Gibbs
- Faculty of Medical Sciences, The University of the West Indies, Cave Hill Campus, Bridgetown BB11000, Barbados
| | - Charisse Alexander
- Faculty of Medical Sciences, The University of the West Indies, Cave Hill Campus, Bridgetown BB11000, Barbados
| | - Heather Harewood
- Faculty of Medical Sciences, The University of the West Indies, Cave Hill Campus, Bridgetown BB11000, Barbados
| | - O Peter Adams
- Faculty of Medical Sciences, The University of the West Indies, Cave Hill Campus, Bridgetown BB11000, Barbados
| | - Subir Gupta
- Faculty of Medical Sciences, The University of the West Indies, Cave Hill Campus, Bridgetown BB11000, Barbados
| | - Ali Davod Parsa
- School of Allied Health and Social Care, Faculty of Health, Medicine and Social Care, Anglia Ruskin University, Chelmsford CM1 1SQ, UK
| | - Russell Kabir
- School of Allied Health and Social Care, Faculty of Health, Medicine and Social Care, Anglia Ruskin University, Chelmsford CM1 1SQ, UK
| | - Md Anwarul Azim Majumder
- Faculty of Medical Sciences, The University of the West Indies, Cave Hill Campus, Bridgetown BB11000, Barbados
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Nejthardt MB, Alexandris P, Bechan S, Bijli MFA, Chetty S, Dippenaar JM, Gibbs M, Johnson M, Kluyts H, Llewellyn R, Motiang M, Mogane P, Motshabi P, Mrara B, Roodt F, Singh U, Spijkerman S, Turton E, Van der Westhuizen J, Biccard B. The development of a nurse-led preoperative anaesthesia screening tool by Delphi consensus. S Afr Med J 2024; 114:e1306. [PMID: 38525581 DOI: 10.7196/samj.2024.v114i2.1306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Indexed: 03/26/2024] Open
Abstract
BACKGROUND Low- and middle-income countries have a critical shortage of specialist anaesthetists. Most patients arriving for surgery are of low perioperative risk. Without immediate access to preoperative specialist care, an appropriate interim strategy may be to ensure that only high-risk patients are seen preoperatively by a specialist. Matching human resources to the burden of disease with a nurse-administered pre-operative screening tool to identify high-risk patients who might benefit from specialist review prior to the day of surgery may be an effective strategy. OBJECTIVE To develop a nurse-administered preoperative anaesthesia screening tool to identify patients who would most likely benefit from a specialist review before the day of surgery, and those patients who could safely be seen by the anaesthetist on the day of surgery. This would ensure adequate time for optimisation of high-risk patients preoperatively and limit avoidable day-of-surgery cancellations. METHODS A systematic review was conducted to identify preoperative screening questions for use in a three-round Delphi consensus process. A panel of 16 experienced full-time clinical anaesthetists representing all university-affiliated anaesthesia departments in South Africa participated to define a nurses' screening tool for preoperative assessment. RESULTS Ninety-eight studies were identified, which generated 79 questions. An additional 14 items identified by the facilitators were added to create a list of 93 questions for the first round. The final screening tool consisted of 81 questions, of which 37 were deemed critical to identify patients who should be seen by a specialist prior to the day of surgery. CONCLUSION A structured nurse-administered preoperative screening tool is proposed to identify high-risk patients who are likely to benefit from a timely preoperative specialist anaesthetist review to avoid cancellation on the day of surgery.
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Affiliation(s)
- M B Nejthardt
- Department of Anaesthesia and Perioperative Medicine, Faculty of Health Sciences, University of Cape Town, South Africa; Department of Anaesthesia and Perioperative Medicine, Groote Schuur Hospital, Cape Town, South Africa.
| | - P Alexandris
- Department of Anaesthesia, Faculty of Health Sciences, Nelson Mandela University, Gqeberha, South Africa.
| | - S Bechan
- Discipline of Anaesthesiology and Critical Care, Nelson R Mandela School of Medicine, University of Kwa-Zulu Natal, Albert Luthuli Academic Hospital, Durban, South Africa.
| | - M F A Bijli
- Department of Anaesthesia and Perioperative Medicine, Faculty of Health Sciences, University of Cape Town, South Africa.
| | - S Chetty
- Department of Anaesthesia and Critical Care, Stellenbosch University and Tygerberg Hospital, Cape Town, South Africa.
| | - J M Dippenaar
- Department of Anaesthesiology, Steve Biko Academic Hospital, University of Pretoria, South Africa.
| | - M Gibbs
- Department of Anaesthesia and Perioperative Medicine, Faculty of Health Sciences, University of Cape Town, South Africa; Department of Anaesthesia and Perioperative Medicine, Groote Schuur Hospital, Cape Town, South Africa.
| | - M Johnson
- Department of Anaesthesia and Critical Care, Stellenbosch University and Tygerberg Hospital, Cape Town, South Africa.
| | - H Kluyts
- Department of Anaesthesiology and Critical Care, Sefako Makgatho Health Sciences University, Pretoria, South Africa.
| | - R Llewellyn
- Department of Anaesthesia and Perioperative Medicine, Faculty of Health Sciences, University of Cape Town, South Africa; Department of Anaesthesia and Perioperative Medicine, Groote Schuur Hospital, Cape Town, South Africa.
| | - M Motiang
- Department of Anaesthesiology and Critical Care, Sefako Makgatho Health Sciences University, Pretoria, South Africa.
| | - P Mogane
- Department of Anaesthesiology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa; Department of Anaesthesia, Chris Hani Baragwanath Hospital, Soweto, South Africa.
| | - P Motshabi
- Department of Anaesthesiology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa; Department of Anaesthesia, Charlotte Maxeke Hospital, Johannesburg, South Africa.
| | - B Mrara
- Department of Anaesthesia and Critical Care, Nelson Mandela Academic Hospital, Walter Sisulu University, Mthatha, South Africa.
| | - F Roodt
- Department of Anaesthesia and Perioperative Medicine, Faculty of Health Sciences, University of Cape Town, South Africa; George Provincial Hospital, George, South Africa.
| | - U Singh
- Discipline of Anaesthesiology and Critical Care, Nelson R Mandela School of Medicine, University of Kwa-Zulu Natal, Albert Luthuli Academic Hospital, Durban, South Africa.
| | - S Spijkerman
- Department of Anaesthesiology, Steve Biko Academic Hospital, University of Pretoria, South Africa.
| | - E Turton
- Department of Anaesthesia, University of the Free State, Universitas Hospital, Bloemfontein, South Africa.
| | - J Van der Westhuizen
- Department of Anaesthesia, University of the Free State, Universitas Hospital, Bloemfontein, South Africa.
| | - B Biccard
- Department of Anaesthesia and Perioperative Medicine, Faculty of Health Sciences, University of Cape Town, South Africa; Department of Anaesthesia and Perioperative Medicine, Groote Schuur Hospital, Cape Town, South Africa.
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Mosley LM, Priestley S, Brookes J, Dittmann S, Farkaš J, Farrell M, Ferguson AJ, Gibbs M, Hipsey M, Huang J, Lam-Gordillo O, Simpson SL, Tyler JJ, Waycott M, Welsh DT. Extreme eutrophication and salinisation in the Coorong estuarine-lagoon ecosystem of Australia's largest river basin (Murray-Darling). Mar Pollut Bull 2023; 188:114648. [PMID: 36724670 DOI: 10.1016/j.marpolbul.2023.114648] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Revised: 01/16/2023] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
Estuaries in rainfall poor regions are highly susceptible to climatic and hydrological changes. The Coorong, a Ramsar-listed estuarine-coastal lagoon at the end of the Murray-Darling Basin (Australia), has experienced declining ecological health over recent decades. Twenty years of environmental data were analysed to assess patterns and drivers of water quality changes. Large areas of the Coorong are now persistently hyper-saline (salinity >80 psu) and hypereutrophic (total nitrogen, TN > 4 mg L-1, total phosphorus, TP > 0.2 mg L-1, chlorophyll a > 50 μg L-1) which coincided with reduced flushing due to diminished freshwater inflows and increasing evapo-concentration. Sediment quality also was related to flushing, with higher concentrations of organic carbon, TN, TP and sulfides as salinity increased. While total nutrient levels are very high, dissolved inorganic nutrients are generally low. Increased lagoonal flushing would be beneficial to reduce the hypersalinisation and hypereutrophication and improve ecosystem health.
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Affiliation(s)
- L M Mosley
- Faculty of Science, Engineering and Technology, University of Adelaide, Australia.
| | - S Priestley
- Faculty of Science, Engineering and Technology, University of Adelaide, Australia
| | - J Brookes
- Faculty of Science, Engineering and Technology, University of Adelaide, Australia
| | - S Dittmann
- College of Science and Engineering, Flinders University, Australia
| | - J Farkaš
- Faculty of Science, Engineering and Technology, University of Adelaide, Australia
| | - M Farrell
- CSIRO Agriculture & Food, Kaurna Country, Glen Osmond, SA 5064, Australia
| | - A J Ferguson
- New South Wales Department of Planning and Environment, Lidcombe, NSW 2141, Australia
| | - M Gibbs
- CSIRO Environment, Kaurna Country, Glen Osmond, SA 5064, Australia
| | - M Hipsey
- Centre for Water and Spatial Science, University of Western Australia, Perth, WA 6009, Australia
| | - J Huang
- University of South Australia, UniSA STEM, Scarce Resources and Circular Economy (ScaRCE), SA 5000, Australia
| | - O Lam-Gordillo
- College of Science and Engineering, Flinders University, Australia; National Institute of Water and Atmospheric research (NIWA), New Zealand
| | - S L Simpson
- CSIRO Environment, Tharawal Country, Sydney, NSW, Australia
| | - J J Tyler
- Faculty of Science, Engineering and Technology, University of Adelaide, Australia
| | - M Waycott
- Faculty of Science, Engineering and Technology, University of Adelaide, Australia; Botanic Gardens and State Herbarium, Department for Environment and Water, South Australia, Australia
| | - D T Welsh
- School of Environment and Science, Griffith University, Southport, Queensland, Australia
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Swartbooi T, Rubidge G, Gibbs M, Ferg E. Effect of a Hands-On Chemistry Intervention on the behavioural and effective attitudes of learners from low socio-economic high schools. S Afr j chem 2022. [DOI: 10.17159/0379-4350/2022/v76a15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
This research focused on the effect that three easily accessible, cost-effective, and hands-on chemistry experiments which are aligned to Curriculum Assessment Policy Statements (CAPS), had on Grade 9 learners from low socio-economic high schools. These experiments were conducted in an after-school science club format at two quintile-1 high schools situated in Gqeberha, South Africa. The learners' behavioural and affective attitudes were examined using group interviews (n = 6) and a survey (n = 61). The findings from this study showed that learners wanted to share knowledge with their peers and community after learning new scientific skills at the science-club. Learners also recognized the economic and practical importance of science related careers. Responses revealed that learners lose interest if the science does not actively connect or engage with their current circumstances. This study also showed that learners were further motivated to pursue studies in Physical Science in Grades 10 to 12.
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Tibby J, Haynes D, Gibbs M, Mosley L, Bourman RP, Fluin J. The terminal lakes of the Murray River, Australia, were predominantly fresh before large-scale upstream water abstraction: Evidence from sedimentary diatoms and hydrodynamical modelling. Sci Total Environ 2022; 835:155225. [PMID: 35421465 DOI: 10.1016/j.scitotenv.2022.155225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 04/05/2022] [Accepted: 04/08/2022] [Indexed: 06/14/2023]
Abstract
The Murray River is Australia's longest river, draining the continent's largest exoreic catchment. The river is Australia's most economically valuable, but is highly degraded by water extraction. The Murray River's terminal lakes, Lakes Alexandrina and Albert, formed following the mid-Holocene marine transgression. These lakes are part of one of the most ecologically important wetland ecosystems on the Australian continent and are recognised as internationally significant by the Ramsar Convention. As a result of upstream water extraction, the Lower Lakes are threatened by rising salinity. To combat this threat, water is allocated to maintain the Lower Lakes as freshwater ecosystems. This practice is part of the Murray-Darling Basin Plan, one of the largest environmental water allocation plans in the world. The water allocations and the natural history of the Lower Lakes are the subject of academic and public debate, since the water would otherwise be used for consumptive purposes, particularly irrigated agriculture, upstream. Recent modelling postulated that the lakes were saline for much of the period between 8500 and 5000 years ago. However, using new sedimentary diatom and hydrodynamic modelling evidence, we demonstrate that the Lower Lakes were fresh for most of this time, particularly after 7200 years ago. Elevated Murray River discharge between 7200 and 6600 years ago prevented sea water ingress, despite sea levels +1 m higher than present. After 6600 years ago, the lakes remained predominately fresh. Current management is, therefore, consistent with the lakes' history before European colonisation.
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Affiliation(s)
- J Tibby
- Department of Geography, Environment and Population, University of Adelaide, Adelaide, South Australia 5005, Australia; Sprigg Geobiology Centre, University of Adelaide, Adelaide, South Australia 5005, Australia.
| | - D Haynes
- School of Physical Sciences, University of Adelaide, Adelaide, South Australia 5005, Australia.
| | - M Gibbs
- School of Civil, Environmental and Mining Engineering, University of Adelaide, Adelaide, South Australia 5005, Australia.
| | - L Mosley
- School of Agriculture, Food and Wine, University of Adelaide, Adelaide, South Australia 5005, Australia.
| | - R P Bourman
- School of Earth, Atmospheric & Life Sciences, Faculty of Science, Medicine and Health, University of Wollongong, Wollongong, NSW 2522, Australia; College of Science and Engineering, Flinders University, Bedford Park, South Australia 5042, Australia; College of Humanities Arts and Social Sciences, Flinders University, Beford Park, South Australia 5042, Australia.
| | - J Fluin
- School of Biological Sciences, University of Adelaide, Adelaide, South Australia 5005, Australia.
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Laffitte A, Gibbs M, Hernangomez de Alvaro C, Addison J, Lonsdale ZN, Giribaldi MG, Rossignoli A, Vennegeerts T, Winnig M, Klebansky B, Skiles J, Logan DW, McGrane SJ. Kokumi taste perception is functional in a model carnivore, the domestic cat (Felis catus). Sci Rep 2021; 11:10527. [PMID: 34006911 PMCID: PMC8131363 DOI: 10.1038/s41598-021-89558-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2020] [Accepted: 04/28/2021] [Indexed: 01/03/2023] Open
Abstract
Kokumi taste is a well-accepted and characterised taste modality and is described as a sensation of enhancement of sweet, salty, and umami tastes. The Calcium Sensing Receptor (CaSR) has been designated as the putative kokumi taste receptor for humans, and a number of kokumi-active ligands of CaSR have been discovered recently with activity confirmed both in vivo and in vitro. Domestic cats (Felis catus) are obligate carnivores and accordingly, their diet is abundant in proteins, peptides, and amino acids. We hypothesised that CaSR is a key taste receptor for carnivores, due to its role in the detection of different peptides and amino acids in other species. Using in silico, in vitro and in vivo approaches, here we compare human CaSR to that of a model carnivore, the domestic cat. We found broad similarities in ligand specificity, but differences in taste sensitivity between the two species. Indeed our in vivo data shows that cats are sensitive to CaCl2 as a kokumi compound, but don't show this same activity with Glutathione, whereas for humans the reverse is true. Collectively, our data suggest that kokumi is an important taste modality for carnivores that drives the palatability of meat-derived compounds such as amino acids and peptides, and that there are differences in the perception of kokumi taste between carnivores and omnivores.
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Affiliation(s)
- A Laffitte
- WALTHAM Petcare Science Institute, Freeby Lane, Waltham on the Wolds, Melton Mowbray, Leicestershire, LE14 4RT, UK
| | - M Gibbs
- WALTHAM Petcare Science Institute, Freeby Lane, Waltham on the Wolds, Melton Mowbray, Leicestershire, LE14 4RT, UK
| | - C Hernangomez de Alvaro
- WALTHAM Petcare Science Institute, Freeby Lane, Waltham on the Wolds, Melton Mowbray, Leicestershire, LE14 4RT, UK
| | - J Addison
- WALTHAM Petcare Science Institute, Freeby Lane, Waltham on the Wolds, Melton Mowbray, Leicestershire, LE14 4RT, UK
| | - Z N Lonsdale
- WALTHAM Petcare Science Institute, Freeby Lane, Waltham on the Wolds, Melton Mowbray, Leicestershire, LE14 4RT, UK
| | - M G Giribaldi
- IMAX Discovery GmbH, Otto-Hahn-Straße 15, 44227, Dortmund, Germany.,AXXAM S.p.A., OpenZone, Via Meucci 3, 20091, Bresso, Milan, Italy
| | - A Rossignoli
- IMAX Discovery GmbH, Otto-Hahn-Straße 15, 44227, Dortmund, Germany.,AXXAM S.p.A., OpenZone, Via Meucci 3, 20091, Bresso, Milan, Italy
| | - T Vennegeerts
- IMAX Discovery GmbH, Otto-Hahn-Straße 15, 44227, Dortmund, Germany.,AXXAM S.p.A., OpenZone, Via Meucci 3, 20091, Bresso, Milan, Italy
| | - M Winnig
- IMAX Discovery GmbH, Otto-Hahn-Straße 15, 44227, Dortmund, Germany.,AXXAM S.p.A., OpenZone, Via Meucci 3, 20091, Bresso, Milan, Italy
| | - B Klebansky
- BioPredict, Inc., 4 Adele Avenue, Demarest, NJ, 07627, USA
| | - J Skiles
- BioPredict, Inc., 4 Adele Avenue, Demarest, NJ, 07627, USA.,Valis Pharma, Ins., 545 Bonair Way, La Jolla, CA, 92037, USA
| | - D W Logan
- WALTHAM Petcare Science Institute, Freeby Lane, Waltham on the Wolds, Melton Mowbray, Leicestershire, LE14 4RT, UK
| | - S J McGrane
- WALTHAM Petcare Science Institute, Freeby Lane, Waltham on the Wolds, Melton Mowbray, Leicestershire, LE14 4RT, UK.
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Loong H, Wong C, Chan C, Chang A, Zhou Z, Tang W, Gibbs M. OA05.05 Economic Impact of Next-Generation Sequencing (NGS) vs. Single-gene Testing Strategies to Detect Genomic Alterations (GAs) in mNSCLC in Asia. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Wise R, Bishop D, Gibbs M, Govender K, James MFM, Kabambi F, Louw V, Mdladla N, Moipalai L, Motchabi-Chakane P, Nolte D, Rodseth R, Schneider F, Turton E. South African Society of Anaesthesiologists Perioperative Patient Blood Management Guidelines 2020. South Afr J Anaesth Analg 2020. [DOI: 10.36303/sajaa.2020.26.6.s1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Anaesthesiologists regularly request and administer blood components to their patients, a potentially life-saving intervention. All anaesthesiologists must be familiar with the indications and appropriate use of blood and blood components and their alternatives, but close liaison with haematologists and their local haematology blood sciences laboratory is encouraged. In the last decade, there have been considerable changes in approaches to optimal use of blood components, together with the use of alternative products, with a need to update previous guidelines and adapt them for anaesthesiologists working throughout the hospital system.
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Affiliation(s)
- R Wise
- University of KwaZulu-Natal
| | | | | | | | | | | | | | - N Mdladla
- Sefako Makgatho Health Sciences University
| | | | | | - D Nolte
- University of the Witwatersrand
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Loong H, Wong C, Leung L, Chan C, Chang A, Zhou ZY, Tang W, Gibbs M. 391P Economic impact of next-generation sequencing (NGS) versus single-gene testing modalities to detect genomic alterations (GAs) in metastatic non-small cell lung cancer (mNSCLC) in Asia. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.10.385] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Loong H, Wong C, Leung L, Chan C, Chang A, Gibbs M. Cost-effectiveness of ceritinib in previously untreated ALK-positive advanced non-small cell lung cancer in Hong Kong. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy425.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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DeGennaro V, Gibbs M, Wilson C, Louis N, Kanyandekwe D, Petterson C. Women's Cancer Screening in Haiti: Increasing Access by Bringing Services to the Workplace. J Glob Oncol 2018. [DOI: 10.1200/jgo.18.84300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Background: Cervical cancer is the leading cause of cancer-related death in Haiti yet the country does not provide sufficient screening. Working class women in Haiti are less likely to receive cancer screening or education than the poorest quartile of women. This is an untouched demographic not necessarily because of financial burdens but because most women work 6 days weekly and lack the time to seek healthcare and appropriate screening. Innovating Health International (IHI) and Share Hope recently implemented a cancer screening program using vaginal HPV self-swabs and clinical breast exams for working class women in Port-au-Prince. Aim: To not only bring much needed cervical cancer education, screening and treatment to an unreached demographic but also to assess the plausibility and acceptance by female factory workers to receive routine screening and treatment in clinics that reside within the workplace. Methods: The project began in September 2017 and will run for 12 months with plans to screen 4000 women with vaginal HPV swabs (QIAGEN careHPV) and clinical breast exams. Nurses perform clinical breast exam, teach self-breast exam, and instruct patients how to perform vaginal self-swab in the factory infirmary. Inclusion criteria for women include age 30 to 50 years. Women who screen positive for HPV will then be followed with visual inspection of the cervix with acetic acid (VIA) and thermocoagulation. Those who have suspicious masses in their breast have a breast ultrasound performed at the factory clinic. A smaller percentage of women with advanced disease will be referred to outside gynecology clinics. Results: Data collection is half-way completed and we´ll present full data in October. Over 3122 women have participated and received education on women's health issues during their lunch hour at the factories. Of all those sensitized, 2691 or 86.1% chose to have clinical breast exam. Of those who are eligible for HPV screening, 1948 or 93.8% of those eligible accepted testing. Of those tested, 344 or 16% were HPV-positive and all but a 5 completed VIA. For women who are HPV-positive, 69 or 20% were also VIA positive. All HPV-positive women received thermocoagulation except for 2, who were referred for colposcopy and loop electrocautery excisional procedure. There were 141 women who had a positive clinical breast exam and underwent breast ultrasound with only 2 requiring a biopsy. Conclusion: We seek to expand access to cervical cancer screening for the rural and working poor through using mobile health technologies coupled with community-based education and screening. HPV-positive women can undergo treatment by a traveling nurse with portable thermocoagulation therapy where they live or work, without the need to travel or leave work. With no doctor, no electricity, no pelvic exam for most women, and no stable infrastructure, we can screen women in rural areas and the working poor at their place of employment.
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Affiliation(s)
- V. DeGennaro
- Florida International University, Miami Beach, FL
| | - M. Gibbs
- University of Florida, Gainesville, FL
| | - C. Wilson
- University of Florida, Gainesville, FL
| | - N. Louis
- Innovating Health International, Port-au-Prince, Haiti
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Gibbs M, Drey N, Baldwin C. Oral nutrition support interventions for patients who are malnourished or at risk of malnutrition: a survey of clinical practice amongst UK dietitians. J Hum Nutr Diet 2018; 32:108-118. [PMID: 30264530 DOI: 10.1111/jhn.12599] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND Guidance on choosing oral nutritional support strategies varies and the evidence for different approaches is discordant. The present study aimed to examine opinion and practice in the use of oral nutritional support amongst UK dietitians and to assess the factors that influence these clinical decisions. METHODS The study comprised a cross-sectional, anonymous, national survey of UK dietitians. RESULTS There were 207 completed responses (3% response rate). More dietitians reported using combined approaches (COMB) [n = 129 (62%)] over food-based (FB) strategies [n = 70 (34%)] or oral nutritional supplements (ONS) alone [n = 8 (4%)] (N = 207, P < 0.001). Intervention choice was associated with clinical setting and clinical speciality; community dietitians reported more frequent use of FB or ONS alone [n = 48 (59%)] versus COMB [n = 34 (41%)] compared to acute dietitians [COMB: n = 83 (78%) COMB versus FB or ONS alone: n = 24 (22%)] (N = 207, P < 0.0001). Specialist nutrition support dietitians reported more frequent use of FB or ONS alone [n = 22 (54%)] versus COMB [n = 19 (46%)] compared to nonspecialists [FB or ONS alone: n = 17 (45%) versus COMB: n = 21 (55%)] and other specialist dietitians [FB or ONS: n = 39 (30%) alone versus COMB: n = 89 (70%)] (P = 0.017). The greatest influences on choice were ease of implementation [n = 192 (93%)], departmental protocols [n = 184 (89%)], professional management pathways [n = 179 (87%)] and published research [n = 165 (80%)]. Patient circumstances [n = 117 (57%) and n = 99 (48%)] and ease of implementation [n = 35 (17%) and n = 48 (24%)] were reported as most influential in the first and second case scenarios, respectively. CONCLUSIONS There is a need for further research on approaches to the dietetic management of adult malnutrition.
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Affiliation(s)
- M Gibbs
- Department of Nutritional Sciences, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
| | - N Drey
- School of Health Sciences, City, University of London, London, UK
| | - C Baldwin
- Department of Nutritional Sciences, School of Life Course Sciences, Faculty of Life Sciences & Medicine, King's College London, London, UK
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Greig K, Gosling A, Collins CJ, Boocock J, McDonald K, Addison DJ, Allen MS, David B, Gibbs M, Higham CFW, Liu F, McNiven IJ, O'Connor S, Tsang CH, Walter R, Matisoo-Smith E. Complex history of dog (Canis familiaris) origins and translocations in the Pacific revealed by ancient mitogenomes. Sci Rep 2018; 8:9130. [PMID: 29904060 PMCID: PMC6002536 DOI: 10.1038/s41598-018-27363-8] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 05/31/2018] [Indexed: 11/22/2022] Open
Abstract
Archaeological evidence suggests that dogs were introduced to the islands of Oceania via Island Southeast Asia around 3,300 years ago, and reached the eastern islands of Polynesia by the fourteenth century AD. This dispersal is intimately tied to human expansion, but the involvement of dogs in Pacific migrations is not well understood. Our analyses of seven new complete ancient mitogenomes and five partial mtDNA sequences from archaeological dog specimens from Mainland and Island Southeast Asia and the Pacific suggests at least three dog dispersal events into the region, in addition to the introduction of dingoes to Australia. We see an early introduction of dogs to Island Southeast Asia, which does not appear to extend into the islands of Oceania. A shared haplogroup identified between Iron Age Taiwanese dogs, terminal-Lapita and post-Lapita dogs suggests that at least one dog lineage was introduced to Near Oceania by or as the result of interactions with Austronesian language speakers associated with the Lapita Cultural Complex. We did not find any evidence that these dogs were successfully transported beyond New Guinea. Finally, we identify a widespread dog clade found across the Pacific, including the islands of Polynesia, which likely suggests a post-Lapita dog introduction from southern Island Southeast Asia.
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Affiliation(s)
- K Greig
- Department of Anthropology and Archaeology, University of Otago, PO Box 56, Dunedin, 9054, New Zealand.
| | - A Gosling
- Department of Anatomy, University of Otago, PO Box 56, Dunedin, 9054, New Zealand
| | - C J Collins
- Department of Anatomy, University of Otago, PO Box 56, Dunedin, 9054, New Zealand
| | - J Boocock
- Department of Human Genetics, David Geffen School of Medicine at UCLA, Los Angeles, 90024, United States of America
| | - K McDonald
- Department of Anatomy, University of Otago, PO Box 56, Dunedin, 9054, New Zealand
| | - D J Addison
- Archaeology Department, American Samoa Power Authority, PO Box 2545, Pago Pago, AS 96799, American Samoa, USA
| | - M S Allen
- Anthropology, School of Social Sciences, University of Auckland, Private Bag 92019, Auckland, 1142, New Zealand
| | - B David
- Monash Indigenous Studies Centre, Monash University, 20 Chancellors Walk, Clayton, VIC, 3800, Australia.,ARC Centre of Excellence for Australian Biodiversity & Heritage, Acton, ACT, 2601, Australia
| | - M Gibbs
- School of Humanities, University of New England, Armidale, NSW, 2351, Australia
| | - C F W Higham
- Department of Anthropology and Archaeology, University of Otago, PO Box 56, Dunedin, 9054, New Zealand
| | - F Liu
- Institute of History and Philology, Academia Sinica, 128 Academia Rd, Taipei City 115, Taiwan
| | - I J McNiven
- Monash Indigenous Studies Centre, Monash University, 20 Chancellors Walk, Clayton, VIC, 3800, Australia.,ARC Centre of Excellence for Australian Biodiversity & Heritage, Acton, ACT, 2601, Australia
| | - S O'Connor
- Archaeology & Natural History, School of Culture History & Language, College of Asia & the Pacific, Australian National University, Acton, ACT, 2601, Australia.,ARC Centre of Excellence for Australian Biodiversity & Heritage, Acton, ACT, 2601, Australia
| | - C H Tsang
- Institute of History and Philology, Academia Sinica, 128 Academia Rd, Taipei City 115, Taiwan
| | - R Walter
- Department of Anthropology and Archaeology, University of Otago, PO Box 56, Dunedin, 9054, New Zealand
| | - E Matisoo-Smith
- Department of Anatomy, University of Otago, PO Box 56, Dunedin, 9054, New Zealand.
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Hinds D, Chapman KR, Piazza P, Gibbs M, Raherison C, Gaalswyk K, Greulich T, Lin J, Adachi M, Davis K. Physician Perspectives on the Burden and Management of Asthma in Six Countries: The Global Asthma Physician Survey (GAPS). Pneumologie 2017. [DOI: 10.1055/s-0037-1598376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- D Hinds
- Worldwide Epidemiology, GlaxoSmithKline, Collegeville, Pennsylvania
| | | | - P Piazza
- Dock Family Medical Practice, Five Dock
| | - M Gibbs
- Global Respiratory Franchise, GlaxoSmithKline, Brentford
| | | | | | | | - J Lin
- China-Japan Friendship Hospital, Beijing
| | - M Adachi
- International University of Health and Welfare, Tokyo
| | - K Davis
- Worldwide Epidemiology, GlaxoSmithKline, Collegeville, Pennsylvania
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Eastwood JP, Biffis E, Hapgood MA, Green L, Bisi MM, Bentley RD, Wicks R, McKinnell LA, Gibbs M, Burnett C. The Economic Impact of Space Weather: Where Do We Stand? Risk Anal 2017; 37:206-218. [PMID: 28230267 DOI: 10.1111/risa.12765] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Revised: 11/22/2016] [Accepted: 12/05/2016] [Indexed: 06/06/2023]
Abstract
Space weather describes the way in which the Sun, and conditions in space more generally, impact human activity and technology both in space and on the ground. It is now well understood that space weather represents a significant threat to infrastructure resilience, and is a source of risk that is wide-ranging in its impact and the pathways by which this impact may occur. Although space weather is growing rapidly as a field, work rigorously assessing the overall economic cost of space weather appears to be in its infancy. Here, we provide an initial literature review to gather and assess the quality of any published assessments of space weather impacts and socioeconomic studies. Generally speaking, there is a good volume of scientific peer-reviewed literature detailing the likelihood and statistics of different types of space weather phenomena. These phenomena all typically exhibit "power-law" behavior in their severity. The literature on documented impacts is not as extensive, with many case studies, but few statistical studies. The literature on the economic impacts of space weather is rather sparse and not as well developed when compared to the other sections, most probably due to the somewhat limited data that are available from end-users. The major risk is attached to power distribution systems and there is disagreement as to the severity of the technological footprint. This strongly controls the economic impact. Consequently, urgent work is required to better quantify the risk of future space weather events.
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Affiliation(s)
- J P Eastwood
- The Blackett Laboratory, Imperial College London, London, UK
| | - E Biffis
- Department of Finance, Imperial College Business School, Imperial College London, South Kensington Campus, London, UK
- Department of Risk Management and Insurance, J. Mack Robinson College of Business, Georgia State University, Atlanta, GA, USA
| | - M A Hapgood
- RAL Space, STFC Rutherford Appleton Laboratory, Harwell Campus, Didcot, Oxfordshire, UK
| | - L Green
- Mullard Space Science Laboratory, Holmbury St. Mary, Dorking, Surrey, UK
| | - M M Bisi
- RAL Space, STFC Rutherford Appleton Laboratory, Harwell Campus, Didcot, Oxfordshire, UK
| | - R D Bentley
- Mullard Space Science Laboratory, Holmbury St. Mary, Dorking, Surrey, UK
| | - R Wicks
- Mullard Space Science Laboratory, Holmbury St. Mary, Dorking, Surrey, UK
- Institute for Risk and Disaster Reduction, University College London, Gower Street, London, UK
| | | | - M Gibbs
- Space Weather Programme, Met Office, Exeter, UK
| | - C Burnett
- Space Weather Programme, Met Office, Exeter, UK
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Abstract
Two hundred forty male and female undergraduates participated in two studies investigating judgments in a simulated sexual harassment hearing. A transcript presented a female student's allegations of sexual harassment against a male professor. The first experiment varied the status of the accused professor (national prominence vs. moderate status) and his style of defense (aggressive vs. nonaggressive). The second study varied the emotionality of both the victim and the accused and the time between the occurrence and the reporting of the alleged harassment incident (1 month vs. 6 months). Findings included negative effects on the student's credibility ratings when the professor attacked aggressively and more severe punishment of the defendant when the victim was emotional. It was concluded that process variables may be important in the perception of sexual harassment.
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Baldwin C, Gibbs M, Weekes C. A systematic review to determine the effect of organisational level interventions on nutritional, clinical and patient-centred outcomes. Clin Nutr ESPEN 2015; 10:e185-e186. [DOI: 10.1016/j.clnesp.2015.03.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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18
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Kimber K, Gibbs M, Weekes CE, Baldwin C. Supportive interventions for enhancing dietary intake in malnourished or nutritionally at-risk adults: a systematic review of nonrandomised studies. J Hum Nutr Diet 2015; 28:517-45. [DOI: 10.1111/jhn.12329] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- K. Kimber
- Barts Health NHS Trust; Newham University Hospital; Plaistow London UK
| | - M. Gibbs
- Diabetes and Nutritional Sciences Division; King's College London; London UK
| | - C. E. Weekes
- Department of Nutrition & Dietetics; Guy's & St Thomas NHS Foundation Trust; London UK
| | - C. Baldwin
- Diabetes and Nutritional Sciences Division; King's College London; London UK
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19
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Koidis F, Gibbs M, Hampton S. Is satiation altered by earplugs in an eating rate study. Appetite 2015. [DOI: 10.1016/j.appet.2015.04.028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Dennis AT, Dyer RA, Gibbs M, Nel L, Castro JM, Swanevelder JL. Transthoracic echocardiographic assessment of haemodynamics in severe pre-eclampsia and HIV in South Africa. Anaesthesia 2015; 70:1028-38. [DOI: 10.1111/anae.13038] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/21/2015] [Indexed: 02/06/2023]
Affiliation(s)
- A. T. Dennis
- Department of Anaesthesia; The Royal Women's Hospital Parkville; Parkville Victoria Australia
- Department of Pharmacology and Department of Obstetrics and Gynaecology; The University of Melbourne; Melbourne Victoria Australia
| | - R. A. Dyer
- Department of Anaesthesia; University of Cape Town and Groote Schuur Hospital Cape Town; Cape Town South Africa
| | - M. Gibbs
- Department of Anaesthesia; University of Cape Town and Groote Schuur Hospital Cape Town; Cape Town South Africa
| | - L. Nel
- Department of Anaesthesia; University of Cape Town and Groote Schuur Hospital Cape Town; Cape Town South Africa
| | - J. M. Castro
- Department of Cardiology; St Vincent's Hospital; Fitzroy Victoria Australia
| | - J. L. Swanevelder
- Department of Anaesthesia; University of Cape Town and Groote Schuur Hospital Cape Town; Cape Town South Africa
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Russell J, Abboud C, Williams A, Gibbs M, Pritchard S, Chalfant D. Does changing a patient's dietary consumption of proteins and carbohydrates impact blastocyst development and clinical pregnancy rates from one cycle to the next? Fertil Steril 2012. [DOI: 10.1016/j.fertnstert.2012.07.167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Russell J, Abboud C, Williams A, Gibbs M, Pritchard S, Chalfant D. Does dietary protein and carbohydrate intake influence blastocyst development and pregnancy rates? Fertil Steril 2012. [DOI: 10.1016/j.fertnstert.2012.07.849] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Mandema JW, Gibbs M, Boyd RA, Wada DR, Pfister M. Model-Based Meta-Analysis for Comparative Efficacy and Safety: Application in Drug Development and Beyond. Clin Pharmacol Ther 2011; 90:766-9. [DOI: 10.1038/clpt.2011.242] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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25
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Wilmott L, Hui S, Gibbs M, Hart K. Comparison of traditional and novel measures of body composition and vascular function in women with polycystic ovary syndrome. J Hum Nutr Diet 2011. [DOI: 10.1111/j.1365-277x.2011.01175_41.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Gibbs M, Dawson DA, McCamley C, Wardle AF, Burke T, Armour JAL. Chicken microsatellite markers isolated from libraries enriched for simple tandem repeats. Anim Genet 2008. [DOI: 10.1111/j.1365-2052.1997.00187.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Bateman ED, Bousquet J, Busse WW, Clark TJH, Gul N, Gibbs M, Pedersen S. Stability of asthma control with regular treatment: an analysis of the Gaining Optimal Asthma controL (GOAL) study. Allergy 2008; 63:932-8. [PMID: 18588561 DOI: 10.1111/j.1398-9995.2008.01724.x] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Uncontrolled asthma is characterized by variability. Current asthma guidelines recommend focussing on the achievement and maintenance of control but few studies have examined in detail, using composite measures of control, the stability and potential duration of control once achieved. In this post-hoc analysis of the results of the Gaining Optimal Asthma controL (GOAL) study, we examine the association between the level of asthma control achieved during the step-up phase of the study and the stability of control experienced during the maintenance phase. METHODS GOAL was a 1-year, randomized, stratified, double-blind study of 3421 patients with uncontrolled asthma, which compared salmeterol/fluticasone propionate combination with fluticasone propionate in achieving two composite, guideline-based measures of control: totally controlled and well-controlled asthma. We analysed the proportion and duration of time spent in control, the effect of treatment on asthma stability, and the impact of asthma control stability on unscheduled use of healthcare resources. RESULTS In patients achieving well-controlled or totally controlled asthma, at least well-controlled asthma was maintained for a median of almost 3 and 6 months, and for more than 85% and 95% of weeks of follow-up, respectively. A high level of stability was confirmed in a Markov analysis investigating transitional probability of change in control status. Variability in control was associated with increased probability of an unscheduled healthcare resource use (odds ratio: 1.06, P < 0.001). CONCLUSIONS Most patients achieving guideline-defined control can maintain at least a similar level of control with regular, stable dosing, with little likelihood of losing control.
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Affiliation(s)
- E D Bateman
- Division of Pulmonology, Department of Medicine, University of Cape Town, Cape Town, South Africa
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Patel R, Gibbs M, Hampton S. Effects of antioxidant supplements consumed at night on endothelial function in healthy adults. J Hum Nutr Diet 2008. [DOI: 10.1111/j.1365-277x.2008.00865_7.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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McCarter R, Mejia W, Ikeno Y, Monnier V, Kewitt K, Gibbs M, McMahan A, Strong R. Plasma Glucose and the Action of Calorie Restriction on Aging. J Gerontol A Biol Sci Med Sci 2007; 62:1059-70. [DOI: 10.1093/gerona/62.10.1059] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Koenning SR, Frye JW, Pataky JK, Gibbs M, Cotton D. First Report of Phoma terrestris Causing Red Root Rot on Sweet Corn (Zea mays) in North Carolina. Plant Dis 2007; 91:1054. [PMID: 30780452 DOI: 10.1094/pdis-91-8-1054c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Red root rot, caused by Phoma terrestris E. M. Hansen, caused premature senescence and yield reductions to fresh-market sweet corn in Hyde County, North Carolina in July 2006. Foliar symptoms developed over a period of 5 to 8 days approximately 1 to 2 weeks after anthesis and included desiccation of leaves and poor development of ears. By 3 weeks after pollination, when the sweet corn was harvested, crowns and the first aboveground internode of affected plants were rotted and reddish colored, but roots appeared normal. The root mass of affected plants tended to be greater than that of unaffected plants. Incidence of symptomatic plants was greater than 30% in some fields and was lower on crops planted and harvested early. Symptomatic and asymptomatic plants were adjacent in affected fields. Diseased plants were more common in fields of sweet corn that followed soybean (Glycine max) or a double-crop of onions (Allium cepa) than in fields that followed corn. Incidence of symptomatic plants also differed among adjacent plantings of different sweet corn hybrids. Hybrids '173A', '182A', '378a', and 'XTH1178' had a high incidence of symptomatic plants and '372A', '278A', '8101', and '8102' were less affected. Samples of symptomatic plants of the hybrid '182A' were examined at the North Carolina Plant Disease and Insect Clinic during August. Olivaceous black pycnidia with long setae around the ostioles were imbedded in the stalk near the first node aboveground. Numerous conidia (1.8 to 2.3 × 4.5 to 5.5 μm) were released in cirri from pycnidia. When cultured on potato dextrose agar (PDA), the fungus produced a red pigment and intercalary and terminal chlamydospores. Pathogenicity was demonstrated in the greenhouse by transplanting corn seedlings or direct-seeding corn into pots of soil infested with plates of PDA containing chlamydospores and hyphae. A suspension of chlamydospores and hyphae also was injected into the stems of plants 28 days after transplanting. Five replicates of the pathogenicity experiments were repeated twice with noninoculated controls. After 8 weeks, P. terrestris was recovered from the roots of all inoculated plants. Soil inoculation resulted in necrotic root tissue in approximately 25% of inoculated plants. Approximately 90% of inoculated plants had discolored crowns that resembled symptoms from field infected plants. Stem inoculations resulted in necrosis extending 2 to 5 cm from the point of injection and resulted in shoot death of 40% of inoculated plants that resulted in the development of an adventitious shoot. Red root rot was prevalent on field corn in the Delmarva Peninsula throughout the late 1980s and 1990s (1). To our knowledge, this is the first report of this disease causing damage to sweet corn in North Carolina. Foliar symptoms and discoloration of crowns of diseased sweet corn plants were similar to previously described symptoms of red root rot on field corn (2), however, roots of affected sweet corn plants were not substantially rotted and did not have a symptomatic reddish pink or dark carmine color, presumably because sweet corn is harvested prior to the development of root symptoms. References: (1) K. W. Campbell et al. Plant Dis. 75:1186, 1991. (2) D. G. White, ed. Compendium of Corn Diseases. The American Phytopathological Society, St Paul, MN, 1999.
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Affiliation(s)
- S R Koenning
- Department of Plant Pathology, North Carolina State University, Raleigh 27695-7616
| | - J W Frye
- Department of Plant Pathology, North Carolina State University, Raleigh 27695-7616
| | - J K Pataky
- Department of Crop Science, University of Illinois, Urbana 61801
| | - M Gibbs
- North Carolina Cooperative Extension, Box 219 Swan Quarter 27885
| | - D Cotton
- Seedway, 90 Industrial Road, Elizabethtown, NJ 17022
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Lowe E, Baumann M, Strout T, Perron A, Gibbs M. Improving Patient Flow: The Effect of a Staggered Resident Staffing Pattern. Acad Emerg Med 2007. [DOI: 10.1197/j.aem.2007.03.1292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Ikonomou MG, Higgs DA, Gibbs M, Oakes J, Skura B, McKinley S, Balfry SK, Jones S, Withler R, Dubetz C. Flesh quality of market-size farmed and wild British Columbia salmon. Environ Sci Technol 2007; 41:437-43. [PMID: 17310704 DOI: 10.1021/es060409+] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
This study compared the flesh quality of farmed and wild sources of British Columbia (BC) salmon with respect to concentrations of polychlorinated biphenyl compounds, polychlorinated dibenzodioxins/dibenzofurans and their associated toxic equivalents, total mercury (THg), methylmercury (MeHg), and selected fatty acids of known importance for human health viz., omega-3 (n-3) highly unsaturated fatty acids (n-3 HUFAs) and (n-6) fatty acids. Skinned fillets from known sources of farmed Atlantic, coho, and chinook salmon (n = 110) and wild coho, chinook, chum, sockeye, and pink salmon (n = 91) were examined. Atlantic salmon contained higher PCB concentrations (means, 28-38 ng/g) than farmed coho or chinook salmon, and levels in these latter species were similar to those in wild counterparts (means, 2.8-13.7 ng/g). PCB levels in Atlantic salmon flesh were, nevertheless, 53-71-fold less than the level of concern for human consumption of fish, i.e., 2000 ng/g as established by Health Canada and the U.S. Food and Drug Administration (US-FDA). Similarly, THg and MeHg levels in all samples were well below the Health Canada guideline (0.5 microg/g) and the US-FDA action level (1.0 microg/g). On average, THg in farmed salmon (0.021 microg/g) was similar to or lower than wild salmon (0.013-0.077 microg/g). Atlantic salmon were a richer source (mean, 2.34 g/100 g fillet) of n-3 HUFAs than the other farmed and wild sources of salmon examined (means, 0.39-1.17 g/100 g). The present findings support the recommended weekly consumption guidelines for oily fish species (includes all BC salmon sources) for cardio-protective benefits as made by the American Heart Association and the UK Food Standards Agency.
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Affiliation(s)
- M G Ikonomou
- Department of Fisheries and Oceans (DFO), Institute of Ocean Sciences, Sidney, BC, Canada.
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Affiliation(s)
- M Gibbs
- DEPARTMENT OF BIOLOGY, BROOKHAVEN NATIONAL LABORATORY, UPTON, NEW YORK
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Gibbs M, Lace LA, Jones MJ, Moore AJ. Egg size-number trade-off and a decline in oviposition site choice quality: female Pararge aegeria butterflies pay a cost of having males present at oviposition. J Insect Sci 2005; 5:39. [PMID: 17119621 PMCID: PMC1615246 DOI: 10.1093/jis/5.1.39] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2005] [Accepted: 07/22/2005] [Indexed: 05/12/2023]
Abstract
Once mated, the optimal strategy for females of the monandrous butterfly, Pararge aegeria, is to avoid male contact and devote as much time as possible to ovipositing, as there is little advantage for females to engage in multiple matings. In other butterfly species the presence of males during egg laying has been shown to affect aspects of oviposition behavior and it has been suggested that repeated interference from males has the potential to reduce reproductive output. The aim of this study was to assess the effects of male presence during oviposition on reproductive output and behavior of a population of P. aegeria obtained from Madeira Island, Portugal, and maintained in the laboratory. Two experiments were performed where females were housed individually in small cages. Experiment 1 examined how social factors influenced the egg laying behavior of females. To do this the presence or absence of males was manipulated and egg size and number was measured over the first 14 days of oviposition. It was observed that when males were present during oviposition females made a trade-off between egg size and number. Experiment 2 examined how social factors affected oviposition site choice. Again, male presence/absence was manipulated, but in this experiment where the female laid her egg in relation to host quality was scored, and the size of the egg laid was measured. In the absence of males females selectively positioned their larger eggs on good quality host plants. However, selective oviposition was no longer observed when females were in the presence of males. We suggest that P. aegeria females from the Madeira Island population are adapted for a flexible oviposition strategy, governed by external cues, allowing a trade-off between egg size and number when the time available for egg laying is limiting.
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Affiliation(s)
- M Gibbs
- Department of Biological Sciences, Manchester Metropolitan University, U.K.
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Johnson H, Kovats S, McGregor G, Stedman J, Gibbs M, Walton H. The impact of the 2003 heat wave on daily mortality in England and Wales and the use of rapid weekly mortality estimates. Euro Surveill 2005. [DOI: 10.2807/esm.10.07.00558-en] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
This paper describes a retrospective analysis of the impact of the 2003 heat wave on mortality in England and Wales, and compares this with rapid estimates based on the Office for National Statistics routine weekly deaths reporting system. Daily mortality data for 4 to 13 August 2003, when temperatures were much hotter than normally seen in England, were compared with averages for the same period in years 1998 to 2002. The August 2003 heat wave was associated with a large short-term increase in mortality, particularly in London. Ozone and particulate matter concentrations were also elevated during the heat wave. Overall, there were 2139 (16%) excess deaths in England and Wales. Worst affected were people over the age of 75 years. The impact was greatest in the London region where deaths in those over the age of 75 increased by 59%. Estimated excess mortality was greater than for other recent heat waves in the United Kingdom.
The estimated number of deaths registered each week is reported by the Office for National Statistics. The first clear indication of a substantial increase in deaths was published on 21 August 2003. This provided a quick first estimate of the number of deaths attributable to the heat wave and reflected the pattern of daily deaths in relation to the hottest days, but underestimated the excess when compared with the later analysis.
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Affiliation(s)
- H Johnson
- Office for National Statistics, London, United Kingdom
| | - S Kovats
- Public and Environmental Health Research Unit, London School of Hygiene and Tropical Medicine, United Kingdom
| | - G McGregor
- School of Geography Earth and Environmental Sciences, The University of Birmingham, Birmingham, United Kingdom
| | - J Stedman
- AEA Technology, Abingdon, United Kingdom
| | - M Gibbs
- Met Office, Exeter, United Kingdom
| | - H Walton
- Air Pollution Unit, Department of Health, London, United Kingdom
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Johnson H, Kovats RS, McGregor G, Stedman J, Gibbs M, Walton H. The impact of the 2003 heat wave on daily mortality in England and Wales and the use of rapid weekly mortality estimates. Euro Surveill 2005; 10:168-71. [PMID: 16088043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023] Open
Abstract
This paper describes a retrospective analysis of the impact of the 2003 heat wave on mortality in England and Wales, and compares this with rapid estimates based on the Office for National Statistics routine weekly deaths reporting system. Daily mortality data for 4 to 13 August 2003, when temperatures were much hotter than normally seen in England, were compared with averages for the same period in years 1998 to 2002. The August 2003 heat wave was associated with a large short-term increase in mortality, particularly in London. Ozone and particulate matter concentrations were also elevated during the heat wave. Overall, there were 2139 (16%) excess deaths in England and Wales. Worst affected were people over the age of 75 years. The impact was greatest in the London region where deaths in those over the age of 75 increased by 59%. Estimated excess mortality was greater than for other recent heat waves in the United Kingdom. The estimated number of deaths registered each week is reported by the Office for National Statistics. The first clear indication of a substantial increase in deaths was published on 21 August 2003. This provided a quick first estimate of the number of deaths attributable to the heat wave and reflected the pattern of daily deaths in relation to the hottest days, but underestimated the excess when compared with the later analysis.
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Affiliation(s)
- H Johnson
- Office for National Statistics, London, United Kingdom
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Badenhorst D, Anamourlis C, Gibbs M, Maseko M, Osadchii O, Woodiwiss AJ, Norton GR. A phosphodiesterase inhibitor promotes the premature development of adverse cardiac remodelling mediated by beta-adrenergic activation in hypertension. S Afr Med J 2004; 94:833-4. [PMID: 15532759] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/01/2023] Open
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Russell J, Pritchard S, Gibbs M, Church R, Lott C, Staab K. Cryopreservation of unstimulated immature oocytes. Fertil Steril 2004. [DOI: 10.1016/j.fertnstert.2004.07.295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Gibbs M. Concentration-QTC modeling in healthy volunteers (HV) and in subjects with major depressive disorder (MDD) for a novel antidepressant candidate. Clin Pharmacol Ther 2004. [DOI: 10.1016/j.clpt.2003.11.336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Gibbs M, Dawson DA, McCamley C, Wardle AF, Burke T, Armour JAL. Chicken microsatellite markers isolated from libraries enriched for simple tandem repeats. Anim Genet 2003. [DOI: 10.1111/j.1365-2052.1997.00184.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Abstract
This paper suggests a probabilistic treatment of the signal processing part of a brain-computer interface (BCI). We suggest two improvements for BCIs that cannot be obtained easily with other data driven approaches. Simply by using one large joint distribution as a model of the entire signal processing part of the BCI, we can obtain predictions that implicitly weight information according to its certainty. Offline experiments reveal that this results in statistically significant higher bit rates. Probabilistic methods are also very useful to obtain adaptive learning algorithms that can cope with nonstationary problems. An experimental evaluation shows that an adaptive BCI outperforms the equivalent static implementations, even when using only a moderate number of trials. This suggests that adaptive translation algorithms might help in cases where brain dynamics change due to learning effects or fatigue.
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Affiliation(s)
- P Sykacek
- Department of Engineering Science, University of Oxford, UK.
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Liebana E, Lindsay E, Clifton-Hadley F, Gibbs M, Barnes S, Garcia-Migura L, Hutchinson M, Snary E, Threlfall E, Davies R. 11. R-plasmid transfer between Salmonella typhimurium and Escherichia coli in laboratory and field models of spread farm waste. Res Vet Sci 2003. [DOI: 10.1016/s0034-5288(03)90010-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Gibbs M, Hampton S, Morgan L, Arendt J. Adaptation of the circadian rhythm of 6-sulphatoxymelatonin to a shift schedule of seven nights followed by seven days in offshore oil installation workers. Neurosci Lett 2002; 325:91-4. [PMID: 12044629 DOI: 10.1016/s0304-3940(02)00247-1] [Citation(s) in RCA: 61] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
This study evaluated circadian adaptation in a 'swing shift' schedule (seven nights, 18:00-06:00 h; then 7 days, 06:00-18:00 h) on North Sea oil installations. Eleven healthy men provided sequential urine collections for the study period offshore. The urinary melatonin metabolite 6-sulphatoxymelatonin (aMT6s) was used as an index of circadian phase. A significant difference (P=0.0004) was found between the mean aMT6s acrophase (calculated peak time) at the start (+/-SD: 05:34+/-2.42 h) and end (+/-SD: 10.95+/-3.34 h) of the night shift week, but not between the start (+/-SD: 11:04+/-4.03 h) and end (+/-SD: 12:59+/-8.83 h) of the day shift week. As a group, the subjects adapted to the night shift but very large individual variations were seen during the day shift. These individual differences clearly require further study.
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Affiliation(s)
- M Gibbs
- Neuroendocrinology Research Group, Centre for Chronobiology, School of Biomedical and Life Sciences, University of Surrey, Guildford, Surrey GU2 7XH, UK
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Markianos K, Carlson S, Gibbs M, Kruglyak L. A joint analysis of asthma affection status and IgE levels in multiple data sets collected for asthma. Genet Epidemiol 2002; 21 Suppl 1:S148-53. [PMID: 11793658 DOI: 10.1002/gepi.2001.21.s1.s148] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
We present a joint linkage analysis of eight data sets collected for asthma. Three of the data sets are full genome scans, while the remaining five concentrate on a 40-cM region on chromosome 5. We perform the analysis using one qualitative and one quantitative phenotype: asthma status and IgE level. Considering all data sets simultaneously, we do not find evidence for linkage to asthma affection status beyond the level expected to occur by chance twice per genome scan. In contrast, we observe significant linkage to IgE level on chromosome 6.
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Affiliation(s)
- K Markianos
- Fred Hutchinson Cancer Research Center, 1100 Fairview Avenue, N., #D4100, P.O. Box 19024, Seattle, WA 98109-1024, USA
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Goode EL, Stanford JL, Peters MA, Janer M, Gibbs M, Kolb S, Badzioch MD, Hood L, Ostrander EA, Jarvik GP. Clinical characteristics of prostate cancer in an analysis of linkage to four putative susceptibility loci. Clin Cancer Res 2001; 7:2739-49. [PMID: 11555587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
PURPOSE Hereditary prostate cancer is an etiologically heterogeneous disease with six susceptibility loci mapped to date. We aimed to describe a collection of high-risk prostate cancer families and assess linkage to multiple markers at four loci: HPC1 (1q24-25), PCaP (1q42.2-43), HPCX (Xq27-28), and CAPB (1p36). EXPERIMENTAL DESIGN Medical record data on 505 affected men in 149 multiply-affected prostate cancer families were reviewed, and correlations of clinical traits within each family were calculated. Logarithm of odds (LOD) score and nonparametric (NPL) linkage analyses were performed; white families were stratified by age of diagnosis, grade and stage of disease, and evidence of linkage to the other loci to increase genetic homogeneity. RESULTS Age at diagnosis was the most correlated clinical trait within families. A maximum NPL score of 2.61 (P = 0.007) appeared to confirm HPC1 linkage for families that had a prevalence of high-grade or advanced-stage prostate cancer and which were not likely to be linked to PCaP, HPCX, or CAPB. Because the NPL scores improved when families more likely to be linked to the other loci were excluded, HPC1 may act independently of the other loci. The relationship of HPC1 and aggressive disease was strongest in families with median age at diagnosis > or =65 years (NPL, 3.48; P = 0.0008). CONCLUSIONS The current results suggest that HPC1 linkage may be most common among families with more severe prostate cancer. Stratification by clinical characteristics may be a useful tool in prostate cancer linkage analyses and may increase our understanding of hereditary prostate cancer.
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Affiliation(s)
- E L Goode
- Department of Epidemiology, School of Public Health and Community Medicine, University of Washington, Seattle, 98195-7236, USA
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Abstract
We reviewed the cases of 16 patients with myelomeningocele and congenital kyphosis. Ten patients underwent kyphectomy with wire fixation and spinal fusion for severe-curve progression and problems with decubiti ulcers. The average curve magnitude at presentation for these 10 patients was 87 degrees (range 47-146 degrees); at an average follow-up of 5 + 8 years (range 2 + 9 to 9 + 9 years) after surgery, it was 60 degrees (range 15-80 degrees). A stable fusion was achieved in nine patients, and all 10 had improved status of their skin at their last follow-up. Six patients were managed by nonoperative means such as modified wheelchairs and orthoses. The average curve magnitude at the presentation for this group was 70 degrees (range 42 degrees - 93 degrees); at an average follow-up of 19 years (range 5 + 5 to 27 + 3 years), it was 106 degrees (range 65 degrees - 130 degrees). Two of these patients continue to have problems with skin breakdown. Kyphectomy enables patients to sit straighter and is the proper treatment for these patients. If operative treatment is prohibitive or denied for some reason, then suitable wheelchair modifications can enable these patients to function with reasonable comfort.
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Affiliation(s)
- J Martin
- Alfred I. duPont Institute, Wilmington, DE 19899
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Peters MA, Jarvik GP, Janer M, Chakrabarti L, Kolb S, Goode EL, Gibbs M, DuBois CC, Schuster EF, Hood L, Ostrander EA, Stanford JL. Genetic linkage analysis of prostate cancer families to Xq27-28. Hum Hered 2001; 51:107-13. [PMID: 11096277 DOI: 10.1159/000022965] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVES A recent linkage analysis of 360 families at high risk for prostate cancer identified the q27-28 region on chromosome X as the potential location of a gene involved in prostate cancer susceptibility. Here we report on linkage analysis at this putative HPCX locus in an independent set of 186 prostate cancer families participating in the Prostate Cancer Genetic Research Study (PROGRESS). METHODS DNA samples from these families were genotyped at 8 polymorphic markers spanning 14.3 cM of the HPCX region. RESULTS Two-point parametric analysis of the total data set resulted in positive lod scores at only two markers, DXS984 and DXS1193, with scores of 0.628 at a recombination fraction (theta) of 0.36 and 0.012 at theta = 0.48, respectively. The stratification of pedigrees according to the assumed mode of transmission increased the evidence of linkage at DXS984 in 81 families with no evidence of male-to-male transmission (lod = 1.062 at theta = 0.28). CONCLUSIONS Although this analysis did not show statistically significant evidence for the linkage of prostate cancer susceptibility to Xq27-28, the results are consistent with a small percentage of families being linked to this region. The analysis further highlights difficulties in replicating linkage results in an etiologically heterogeneous, complexly inherited disease.
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Affiliation(s)
- M A Peters
- Division of Clinical Research, Fred Hutchinson Cancer Research Center, Seattle, WA 98109-1024, USA
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