54 results on '"Griffin AR"'
Search Results
2. EVALUATING APPROACHES FOR DEVELOPING ELITE ACACIA HYBRID CLONES IN VIETNAM : TOWARDS AN UPDATED STRATEGY
- Author
-
Son, DH, Harwood, CE, Kien, ND, Griffin, AR, Thinh, HH, and Son, L
- Published
- 2018
3. A comparison of fibre and pulp properties of diploid and tetraploid Acacia mangium grown in Vietnam
- Author
-
Griffin, AR, Twayi, H, Braunstein, R, Downes, GM, Son, Do Huu, and Harwood, CE
- Published
- 2014
4. POLLEN-PISTIL INTERACTIONS BETWEEN AUTOTETRAPLOID AND DIPLOID ACACIA MANGIUM AND DIPLOID A. AURICULIFORMIS
- Author
-
Nghiem, QC, Harbard, JL, Harwood, CE, Griffin, AR, Ha, TH, and Koutoulis, A
- Published
- 2013
5. Persistent Inflammation in Cerebral Palsy: Pathogenic Mediator or Comorbidity? A Scoping Review
- Author
-
Paton, MCB, Finch-Edmondson, M, Dale, RC, Fahey, MC, Nold-Petry, CA, Nold, MF, Griffin, AR, Novak, I, Paton, MCB, Finch-Edmondson, M, Dale, RC, Fahey, MC, Nold-Petry, CA, Nold, MF, Griffin, AR, and Novak, I
- Abstract
Research has established inflammation in the pathogenesis of brain injury and the risk of developing cerebral palsy (CP). However, it is unclear if inflammation is solely pathogenic and primarily contributes to the acute phase of injury, or if inflammation persists with consequence in CP and may therefore be considered a comorbidity. We conducted a scoping review to identify studies that analyzed inflammatory biomarkers in CP and discuss the role of inflammation in the pathogenesis of CP and/or as a comorbidity. Twelve included studies reported a range of analytes, methods and biomarkers, including indicators of inflammatory status, immune function and genetic changes. The majority of controlled studies concluded that one or more systemic biomarkers of inflammation were significantly different in CP versus controls; most commonly serum or plasma cytokines such as tumor necrosis factor, Interleukin (IL)-6 and IL-10. In addition, differences in inflammation were noted in distinct subgroups of CP (e.g., those with varying severity). The available evidence supports the pathogenic role of inflammation and its ongoing role as a comorbidity of CP. This review shows that inflammation may persist for decades, driving functional impairment across development and into adulthood. However, inflammation is complex, thus further research will increase our understanding.
- Published
- 2022
6. Potential pollen vectors of the mass flowering tree Acacia dealbata, within its natural range in southern Tasmania
- Author
-
Griffin, AR, primary, Hingston, AB, additional, Harwood, CE, additional, Harbard, JL, additional, Brown, MJ, additional, Ellingsen, KM, additional, and Young, CM, additional
- Published
- 2020
- Full Text
- View/download PDF
7. Mortality and pathology in brown bullheads Amieurus nebulosus associated with a spontaneous Edwardsiella ictaluri outbreak under tank culture conditions
- Author
-
Iwanowicz, LR, primary, Griffin, AR, additional, Cartwright, DD, additional, and Blazer, VS, additional
- Published
- 2006
- Full Text
- View/download PDF
8. Reproductive-Biology and Interspecific Hybridization of Acacia mangium and Acacia auriculiformis A. Cunn. ex Benth (Leguminosae, Mimosoideae)
- Author
-
Sedgley, M, primary, Harbard, J, additional, Smith, RMM, additional, Wickneswari, R, additional, and Griffin, AR, additional
- Published
- 1992
- Full Text
- View/download PDF
9. Patterns of Natural and Manipulated Hybridisation in the Genus Eucalyptus L'hérit. ̵1 A Review
- Author
-
Griffin, AR, primary, Burgess, IP, additional, and Wolf, L, additional
- Published
- 1988
- Full Text
- View/download PDF
10. Floral Phenology of a Stand of Mountain Ash (Eucalyptus regnans F. Muell.) In Gippsland, Victoria
- Author
-
Griffin, AR, primary
- Published
- 1980
- Full Text
- View/download PDF
11. Pollen Tube Growth and Early Seed Development in Eucalyptus regnans F. Muell. (Myrtaceae) in Relation to Ovule Structure and Preferential Outcrossing
- Author
-
Sedgley, M, primary, Hand, FC, additional, Smith, RM, additional, and Griffin, AR, additional
- Published
- 1989
- Full Text
- View/download PDF
12. Variation in Eucalyptus cypellocarpa L. Johnson in Victoria, and a new taxon form the Grampian Ranges and Anglesea
- Author
-
Watson, RJ, primary, Ladiges, PY, additional, and Griffin, AR, additional
- Published
- 1987
- Full Text
- View/download PDF
13. Preferential Outcrossing in Eucalyptus regnans F. Muell
- Author
-
Griffin, AR, primary, Moran, GF, additional, and Fripp, YJ, additional
- Published
- 1987
- Full Text
- View/download PDF
14. Veterans Affairs Training Experiences During the COVID-19 Pandemic-Trainee Satisfaction and Interest in Future Veterans Affairs Employment: A National Survey.
- Author
-
Griffin AR, Bai J, Northcraft H, and Dobalian A
- Abstract
Introduction: The emergence of COVID-19 caused a sudden, unexpected disruption in the clinical training experiences of nurse trainees at the US Department of Veterans Affairs (VA), the largest clinical training setting in the US for nurses., Purpose: To understand associations between COVID-19 and nurse trainees' satisfaction with their training experiences and the likelihood that they would consider future VA employment., Methods: A cross-sectional design was used to assess 7,890 nurse responses from the VA's Trainee Satisfaction Survey for academic years 2018-2021., Results: After the pandemic, trainees reported decreased training satisfaction (95.06% vs. 93.46%; P = .0028). Willingness to consider future VA employment was unchanged. Patient case mix, the onboarding process, and challenges with other staff were the most common reasons for dissatisfaction., Conclusion: Nurse trainees expressed a small but statistically significant degree of dissatisfaction with their clinical learning environment during this study period but their willingness to seek employment with the VA remained high., Competing Interests: The authors declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article., (© The Author(s) 2024.)
- Published
- 2024
- Full Text
- View/download PDF
15. Dental and dental hygienist trainee satisfaction with their veterans affairs clinical training experiences during the COVID-19 pandemic.
- Author
-
Northcraft H, Bai J, Griffin AR, and Dobalian A
- Subjects
- Humans, United States epidemiology, Male, Female, Personal Satisfaction, Adult, Pandemics, SARS-CoV-2, Surveys and Questionnaires, Dentists psychology, COVID-19 epidemiology, United States Department of Veterans Affairs, Dental Hygienists education, Dental Hygienists psychology
- Abstract
Background: The COVID-19 pandemic rapidly altered dental practice, training, and education. This study investigates the pandemic's impacts on the clinical training experiences of dental and dental hygienist trainees at the US Department of Veterans Affairs (VA)., Methods: Using data from post-doctoral general practice dentists, dental specialists, and dental hygienist trainees who completed the VA Trainee Satisfaction Survey before and during COVID-19, we performed logistic regression and thematic content analyses to determine whether COVID-19 was associated with training satisfaction and likelihood of considering future VA employment., Results: While post-doctoral dentist and dental specialty trainees did not report significant differences, dental hygienist trainees reported increased overall satisfaction and an increased likelihood to consider future VA employment during the pandemic compared to before the pandemic. Similar reasons for dissatisfaction were identified for both the pre-pandemic and pandemic groups., Conclusions: Research outside VA indicates the pandemic's association with trainees' intentions to leave health profession education programs. Our results suggest the likely existence of factors that could lead to positive changes for at least some portion of the dental workforce. Future studies should explore those potential factors as some may be replicable in other settings or may apply to other health professions., (© 2024. This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply.)
- Published
- 2024
- Full Text
- View/download PDF
16. Revving up possibilities: can psychostimulants enhance physical function in children with cerebral palsy?
- Author
-
Novak I, Jackman M, Griffin AR, Blatch-Williams R, Norfolk E, Lind K, Polybank D, and Mc Namara M
- Published
- 2024
- Full Text
- View/download PDF
17. Culture of Safety and Preparedness: Benefits of Applying a Daily Mitigation Mindset in the Hospital Setting.
- Author
-
Griffin AR, Dobalian A, Langan JC, and Shipman SJ
- Subjects
- Humans, Hospitals, Data Accuracy, Disaster Planning, Disasters
- Abstract
Aim: Utilizing the subjective experience of nurse executives who have supervised nurses during a major disaster in a hospital setting, this study aims to describe the subjective experience of nurse executives (NE) who have supervised nurses' responses to major disasters. This paper will focus on strategies to support nursing response to disasters, specifically to strengthen resiliency and the ability to maintain function despite the shock of a disaster, including those caused by climate change., Methods: Semi-structured interviews were conducted with 11 hospital-based nurse executives who supervised nurses during some of the worst natural and human-made disasters in different regions of the United States. A phenomenological approach was used to analyze and describe emerging themes from the qualitative data., Results: Three nurse executives demonstrated theme saturation for mitigation steps to augment traditional disaster readiness activities: (1) Assessment of human infrastructure: daily skills needed during disaster response; (2) Identification and study of failure points and metrics; (3) Strengthening human infrastructure: rectifying deficiencies; and (4) Monitoring metrics and making corrections during conventional periods., Conclusion: Mitigation steps may improve outcomes in hospital function during conventional times; therefore, these steps may improve resiliency and the ability to maintain functions during major disasters, including climate change.
- Published
- 2024
- Full Text
- View/download PDF
18. Training satisfaction and future employment consideration among physician and nursing trainees at rural Veterans Affairs facilities in the United States during COVID-19: a time-series before and after study
- Author
-
Northcraft H, Radcliff T, Griffin AR, Bai J, and Dobalian A
- Subjects
- Humans, United States, Employment, SARS-CoV-2, Male, Female, Physicians, Surveys and Questionnaires, Adult, Rural Health Services, Personal Satisfaction, Pandemics, Hospitals, Veterans, Nurses, Rural Population, COVID-19 epidemiology, United States Department of Veterans Affairs
- Abstract
Purpose: The coronavirus disease 2019 (COVID-19) pandemic limited healthcare professional education and training opportunities in rural communities. Because the US Department of Veterans Affairs (VA) has robust programs to train clinicians in the United States, this study examined VA trainee perspectives regarding pandemic-related training in rural and urban areas and interest in future employment with the VA., Methods: Survey responses were collected nationally from VA physicians and nursing trainees before and after COVID-19 (2018 to 2021). Logistic regression models were used to test the association between pandemic timing (pre-pandemic or pandemic), trainee program (physician or nurse), and the interaction of trainee pandemic timing and program on VA trainee satisfaction and trainee likelihood to consider future VA employment in rural and urban areas., Results: While physician trainees at urban facilities reported decreases in overall training satisfaction and corresponding decreases in the likelihood of considering future VA employment from pre-pandemic to pandemic, rural physician trainees showed no changes in either outcome. In contrast, while nursing trainees at both urban and rural sites had decreases in training satisfaction associated with the pandemic, there was no corresponding effect on the likelihood of future employment by nurses at either urban or rural VA sites., Conclusion: The study’s findings suggest differences in the training experiences of physicians and nurses at rural sites, as well as between physician trainees at urban and rural sites. Understanding these nuances can inform the development of targeted approaches to address the ongoing provider shortages that rural communities in the United States are facing.
- Published
- 2024
- Full Text
- View/download PDF
19. Champions for School Health-An NASN Initiative to Increase Vaccine Confidence, Equity, and Uptake in COVID-19 and School-Required Vaccinations: Part 2.
- Author
-
D'Souza-Vazirani D, Behrmann E, Alvarez C, Walsh C, Griffin AR, and White S
- Subjects
- Humans, Child, COVID-19 Vaccines, Vaccination, School Nursing, COVID-19 prevention & control, Vaccines
- Abstract
NASN, with generous funding from Kaiser Permanente (KP) and partnered with the Institute for Educational Leadership, developed and implemented the Champions for School Health (CSH) grant initiative. The CSH initiative awarded 54 Implementation Grants in two funding cycles in 2022, funding school districts and community-based organizations (CBOs) to increase access to the pediatric COVID-19 vaccine as well as school-required immunizations and to increase vaccine confidence among underserved populations in KP's footprint: California, Colorado, Georgia, Hawaii, Maryland, Oregon, Virginia, Washington, and the District of Columbia. These grantees administered a total of 17,630 COVID-19 vaccines to individuals ages 5 or older and 34,025 routine immunizations, of which 8,233 school-required vaccinations went to children of ages 5-11 years. Over 851,000 people were reached by vaccine education events in all nine KP markets. A notable takeaway from the project's results was the new partnerships created and the continuation of existing partnerships by the grantees. NASN's implementation of the CSH initiative and results provides a model and a source of critical data on how school health services and community-based organizations can partner to provide hyper-local responses to community/public health crises. This Part 2 article provides an overview of the key results of the project.
- Published
- 2023
- Full Text
- View/download PDF
20. The potential of cell therapies for cerebral palsy: where are we today?
- Author
-
Novak I, Paton MC, Griffin AR, Jackman M, Blatch-Williams RK, and Finch-Edmondson M
- Subjects
- Humans, Cell- and Tissue-Based Therapy, Cerebral Palsy therapy, Mesenchymal Stem Cell Transplantation
- Published
- 2023
- Full Text
- View/download PDF
21. Champions for School Health-An NASN Initiative to Increase Vaccine Confidence, Equity, and Uptake in COVID-19 and School-Required Vaccinations: Part 1.
- Author
-
D'Souza-Vazirani D, Walsh C, Tanner AL, Clark E, Griffin AR, and White S
- Subjects
- Child, Humans, United States, Child, Preschool, COVID-19 Vaccines, Societies, Nursing, Vaccination, School Nursing, COVID-19 prevention & control
- Abstract
The National Association of School Nurses (NASN) received a U.S.$2 million grant from Kaiser Permanente in January 2022 to increase confidence, equity, and uptake in the COVID-19 vaccine and other school required vaccinations in children ages 5 to 11 in Kaiser's nine markets (eight states and the District of Columbia). NASN was partnered with the Institute of Educational Leadership (IEL) in this initiative to examine ways both organizations could learn how school nurses (SNs) and community schools (CSs) could collaborate to address the goals of this project. NASN gave 54 Implementation Grants in two funding cycles in 2022 and is co-funding two SN-CS collaboration projects with IEL. The Part 1 article provides an overview of the project's goals, grant strategy and processes, grantee information, NASN created tools that resulted from this funding, and successful implementation of the project, which demonstrates NASN's capacity for future similar projects.
- Published
- 2023
- Full Text
- View/download PDF
22. Persistent Inflammation in Cerebral Palsy: Pathogenic Mediator or Comorbidity? A Scoping Review.
- Author
-
Paton MCB, Finch-Edmondson M, Dale RC, Fahey MC, Nold-Petry CA, Nold MF, Griffin AR, and Novak I
- Abstract
Research has established inflammation in the pathogenesis of brain injury and the risk of developing cerebral palsy (CP). However, it is unclear if inflammation is solely pathogenic and primarily contributes to the acute phase of injury, or if inflammation persists with consequence in CP and may therefore be considered a comorbidity. We conducted a scoping review to identify studies that analyzed inflammatory biomarkers in CP and discuss the role of inflammation in the pathogenesis of CP and/or as a comorbidity. Twelve included studies reported a range of analytes, methods and biomarkers, including indicators of inflammatory status, immune function and genetic changes. The majority of controlled studies concluded that one or more systemic biomarkers of inflammation were significantly different in CP versus controls; most commonly serum or plasma cytokines such as tumor necrosis factor, Interleukin (IL)-6 and IL-10. In addition, differences in inflammation were noted in distinct subgroups of CP (e.g., those with varying severity). The available evidence supports the pathogenic role of inflammation and its ongoing role as a comorbidity of CP. This review shows that inflammation may persist for decades, driving functional impairment across development and into adulthood. However, inflammation is complex, thus further research will increase our understanding.
- Published
- 2022
- Full Text
- View/download PDF
23. Are We Getting It Right? A Scoping Review of Outcomes Reported in Cell Therapy Clinical Studies for Cerebral Palsy.
- Author
-
Finch-Edmondson M, Paton MCB, Honan I, Karlsson P, Stephenson C, Chiu D, Reedman S, Griffin AR, Morgan C, and Novak I
- Abstract
Cell therapies are an emergent treatment for cerebral palsy (CP) with promising evidence demonstrating efficacy for improving gross motor function. However, families value improvements in a range of domains following intervention and the non-motor symptoms, comorbidities and complications of CP can potentially be targeted by cell therapies. We conducted a scoping review to describe all outcomes that have been reported in cell therapy studies for CP to date, and to examine what instruments were used to capture these. Through a systematic search we identified 54 studies comprising 2066 participants that were treated with a range of cell therapy interventions. We categorized the reported 53 unique outcome instruments and additional descriptive measures into 10 categories and 12 sub-categories. Movement and Posture was the most frequently reported outcome category, followed by Safety, however Quality of Life, and various prevalent comorbidities and complications of CP were infrequently reported. Notably, many outcome instruments used do not have evaluative properties and thus are not suitable for measuring change following intervention. We provide a number of recommendations to ensure that future trials generate high-quality outcome data that is aligned with the priorities of the CP community.
- Published
- 2022
- Full Text
- View/download PDF
24. Association of the COVID-19 Pandemic on VA Resident and Fellow Training Satisfaction and Future VA Employment: A Mixed Methods Study.
- Author
-
Northcraft H, Bai J, Griffin AR, Hovsepian S, and Dobalian A
- Subjects
- United States, Humans, Personal Satisfaction, Pandemics, United States Department of Veterans Affairs, Employment, COVID-19, Internship and Residency
- Abstract
Background: The COVID-19 pandemic altered learning experiences of residents and fellows worldwide, including at the US Department of Veterans Affairs (VA). Because the VA is the largest training provider in the United States, understanding VA trainee experiences is vital to understanding the pandemic's impact on graduate medical education nationwide. Additionally, understanding the pandemic's potential impacts on future employment allows for a better understanding of any future disruptions in the supply of physicians., Objective: To examine whether COVID-19 affected the satisfaction with VA training experiences and likelihood to consider future VA employment among residents and fellows., Methods: Responses from the VA Trainee Satisfaction Survey were collected for 3 academic years (2018-2021). Quantitative analysis (bivariate logistic regression) and qualitative content analysis were conducted to determine COVID-19's impact on satisfaction and likelihood of future VA employment., Results: Across 3 academic years, 17 900 responses from a total of 140 933 physician trainees were analyzed (12.7%). Following COVID-19, respondents expressed decreased satisfaction (84.58% vs 86.01%, P =.008) and decreased likelihood to consider future VA employment compared to prior to the pandemic (53.42% vs 55.32%, P =.013). COVID-19-related causes of dissatisfaction included the onboarding process, which slowed due to the pandemic, limited workspace that precluded social distancing, and reduced learning opportunities., Conclusions: Since the pandemic, physician trainees expressed decreased training satisfaction and decreased likelihood to seek future VA employment. Causes of dissatisfaction included increased difficulties with onboarding, further limitations to accessible workspaces, and the direct obstruction of learning opportunities including decreased patient volume or case mix., Competing Interests: Conflict of interest: The authors declare they have no competing interests.
- Published
- 2022
- Full Text
- View/download PDF
25. Do expectations of recovery improve risk assessment for people with whiplash-associated disorders? Secondary analysis of a prospective cohort study.
- Author
-
Griffin AR, Sterling M, Ritchie C, Kifley A, Jagnoor J, Cameron ID, and Rebbeck T
- Subjects
- Humans, Prognosis, Prospective Studies, Recovery of Function, Risk Assessment, Motivation, Whiplash Injuries complications, Whiplash Injuries diagnosis, Whiplash Injuries therapy
- Abstract
Background: WhipPredict, which includes prognostic factors of pain-related disability, age and hyperarousal symptoms, was developed and validated for prediction of outcome in people with whiplash associated disorders (WAD). Patient expectations of recovery was not an included factor, though is known to mediate outcomes. The aim of this study was to determine whether the addition of expectations of recovery could improve the accuracy of WhipPredict., Methods: Two hundred twenty-eight participants with acute WAD completed questionnaires (WhipPredict and expectations of recovery) at baseline. Health outcomes (neck disability index (NDI) and Global Perceived Recovery (GPR)) were assessed at 6- and 12-months post injury. Cut-off points for expectations of recovery predictive of both full recovery (NDI ≤10 % , GPR ≥ 4) and poor outcome (NDI ≥30 % , GPR ≤ - 3) were determined, and multivariate logistic regression analyses were used to compare models with and without this variable., Results: Expectations of recovery improved or maintained the accuracy of predictions of poor outcome (6-months: sensitivity 78 to 83%, specificity maintained at 79.5%; 12-months: sensitivity maintained at 80%, specificity 69 to 73%). The sensitivity of predictions of full recovery improved (6-months: 68 to 76%; 12-months: 57 to 81%), though specificity did not change appreciably at 6 months (80 to 81%) and declined at 12 (83 to 76%). ROC curves indicated a larger and more consistent improvement in model performance when expectations of recovery were added to the pathway predictive of full recovery., Conclusions: The addition of expectations of recovery may improve the accuracy of WhipPredict, though further validation is required., (© 2022. The Author(s).)
- Published
- 2022
- Full Text
- View/download PDF
26. Nurse Executive Experiences With COVID-19: Now We Know-We Are Not Going Back.
- Author
-
Langan JC, Griffin AR, Shipman S, and Dobalian A
- Subjects
- Clinical Competence, Humans, Pandemics, SARS-CoV-2, United States, COVID-19 epidemiology, Nurse Administrators
- Abstract
We conducted semistructured telephone interviews with 2 hospital-based nurse leaders who supervised nurses during the initial phases of the COVID-19 pandemic in northeastern region of the United States. These interviews are a subset of a larger study with 11 nurse executives who supervised nurses during both natural and human-made disasters in different regions of the United States. Qualitative data were analyzed using a grounded theory approach, followed by a content analysis of emerging themes. Participants shared several key concepts: deep commitment of nurses in an extensive range of roles and responsibilities during tragic events; an emphasis on educational needs to best prepare nurses for disaster response; the importance of organizational strategies and definitive policies for supporting nurses' response and recovery; and mental/emotional health support as essential for nurses to cope with the events. The nurse executive participants reported many opportunities to enhance nurses' knowledge and skill set to augment care in the hospital. A team-based approach that leverages the expertise of team members to strengthen the health care team is implemented and demonstrates positive patient outcomes., Competing Interests: The authors declare no conflict of interest., (Copyright © 2022 Wolters Kluwer Health, Inc. All rights reserved.)
- Published
- 2022
- Full Text
- View/download PDF
27. Clinimetric Properties of Self-reported Disability Scales for Whiplash: A Systematic Review for the Whiplash Core Outcome Set (CATWAD).
- Author
-
Griffin AR, Leaver AM, Arora M, Walton DM, Peek A, Bandong AN, Sterling M, and Rebbeck T
- Subjects
- Humans, Outcome Assessment, Health Care, Reproducibility of Results, Self Report, Surveys and Questionnaires, Whiplash Injuries diagnosis
- Abstract
Objectives: A core outcomes set (COS) for whiplash-associated disorders (WADs) has been proposed to improve consistency of outcome reporting in clinical trials. Patient-reported disability was one outcome of interest within this COS. The aim of this review was to identify the most suitable tools for measuring self-reported disability in WAD based on clinimetric performance., Methods: Database searches took place in 2 stages. The first identified outcome measures used to assess self-reported disability in WAD, and the second identified studies assessing the clinimetric properties of these outcome measures in WAD. Data on the study, population and outcome measure characteristics were extracted, along with clinimetric data. Quality and clinimetric performance were assessed in accordance with the Consensus-based Standards for the Selection of Health Status Measurement Instruments (COSMIN)., Results: Of 19,663 records identified in stage 1 searches, 32 were retained following stage 2 searches and screening. Both the Whiplash Disability Questionnaire and Neck Disability Index performed well in reliability (intraclass correlation coefficient=0.84 to 0.98), construct validity (74% to 82% of hypotheses accepted), and responsiveness (majority of correlations in accordance with hypotheses). Both received Category B recommendations due to a lack of evidence for content validity., Discussion: This review identified the Neck Disability Index and Whiplash Disability Questionnaire as the most appropriate patient-reported outcome measures (PROMs) for assessing self-reported disability in WAD based on moderate to high-quality evidence for sufficient reliability, construct validity and responsiveness. However, the content validity of these PROMs has yet to be established in WAD, and until this is undertaken, it is not possible to recommend 1 PROM over the other for inclusion in the WAD COS., Competing Interests: The authors declare no conflict of interest., (Copyright © 2021 Wolters Kluwer Health, Inc. All rights reserved.)
- Published
- 2021
- Full Text
- View/download PDF
28. Experiences of responsiveness to exercise in people with chronic whiplash: A qualitative study.
- Author
-
Griffin AR, Moloney N, Leaver A, Jagnoor J, Michaleff ZA, Lin CC, and Rebbeck T
- Subjects
- Exercise Therapy, Humans, Qualitative Research, Range of Motion, Articular, Physical Therapists, Whiplash Injuries therapy
- Abstract
Exercise is recommended in clinical guidelines for the treatment of chronic whiplash associated disorders (WAD). However, randomised controlled trials have shown similar effects for comprehensive exercise programs and advice. To date, there is no clear understanding of why some individuals with WAD appear to respond to exercise whilst others do not. The aim of this study was to explore the experiences and self-reported characteristics of people with chronic whiplash identifying as 'responders' and 'non-responders' to exercise. Semi-structured interviews were conducted with 13 people with chronic whiplash (patients) and seven treating physiotherapists. Patients were asked whether they responded to the exercise program, and what contributed to this. Physiotherapists were asked to share their experiences about the characteristics of people that appear to respond to exercise, and those that do not. An interpretive descriptive approach was selected to facilitate the generation of discipline-specific knowledge. Four themes were generated from patient and physiotherapist interviews, including: (1) the therapeutic relationship, (2) exercise experiences and beliefs, (3) self-efficacy and acceptance, (4) physical and psychological determinants of responsiveness. Responsiveness to exercise is complex and multifaceted. Clinicians may seek to identify the presence of discrete physical impairment(s) (e.g., range of motion restriction), and where present, determine whether targeted exercise results in an immediate and positive response. Clinicians may also focus their efforts on developing aspects of the therapeutic relationship identified as important to patients, such as hope, partnership and rapport., (Copyright © 2021 Elsevier Ltd. All rights reserved.)
- Published
- 2021
- Full Text
- View/download PDF
29. Defining Recovery in Chronic Whiplash: A Qualitative Study.
- Author
-
Griffin AR, Moloney N, Leaver A, Jagnoor J, Michaleff ZA, Lin CC, and Trudy R
- Subjects
- Humans, Qualitative Research, Disabled Persons, Physical Therapists, Whiplash Injuries therapy
- Abstract
Objective: The meaning of recovery from musculoskeletal injury is complex, and understanding recovery from whiplash may be particularly important, given the chronic, often recalcitrant nature of the condition. Gaining a better understanding of recovery may also aid in the development and interpretation of future clinical trials. The aim of this study was to define the meaning of recovery from whiplash, and the factors influencing recovery, by exploring the perceptions of people with chronic whiplash, and their treating physiotherapists., Materials and Methods: This qualitative study was embedded within a larger randomized-controlled trial, and consisted of semistructured interviews. Interviews were conducted with 13 patient participants with chronic whiplash and 7 physiotherapists. Patient participants were asked what recovery meant to them, and perceptions around barriers and facilitators to recovery were explored. Physiotherapists were also asked to share their beliefs on the meaning of recovery, and what they believe recovery means to their patients., Results: Both patient participants and physiotherapists perceived recovery to be defined within the themes of pain, function, and emotional well-being. Patient participants also identified self-perception as important, whereas physiotherapists identified ownership on the part of the patient, and the multidimensional nature of recovery, including cultural values and beliefs, as important. Several themes relating to barriers and facilitators to recovery were also identified, and included personal and social characteristics and aspects of the therapeutic relationship., Discussion: Recovery is a multidimensional and complex construct. In addition to pain intensity and disability, measurement and conceptualization of recovery should focus on emotional well-being, self-perception, and the cultural values and beliefs of the individual. A positive therapeutic relationship, with attention to psychological and social influences, appears to be important in facilitating recovery and well-being.
- Published
- 2020
- Full Text
- View/download PDF
30. Evaluation of a Magic Camp for Children with Hemiparesis: A Pilot Study.
- Author
-
Spencer K, Yuen HK, Jenkins GR, Kirklin K, Griffin AR, Vogtle LK, and Davis D
- Subjects
- Adolescent, Child, Child Care, Disability Evaluation, Female, Humans, Male, Pilot Projects, Cerebral Palsy physiopathology, Cerebral Palsy rehabilitation, Magic, Paresis physiopathology, Paresis rehabilitation, Recreation
- Abstract
This single-group open trial was designed to evaluate the effectiveness of a two-week magic camp as a means of hand-arm motor skills training to improve upper limb motor function (unilateral and bilateral) in children with hemiparesis. Seven children with hemiparesis participated in a magic camp program which met 3 days a week, 4 hours each day, for two consecutive weeks for a total of 24 hours. Participants completed three assessments at the beginning of the camp, post-camp, and at a three-month follow-up: the Jebsen Hand Function Test (JHFT), Children's Hand Experience Questionnaire (CHEQ), and a box opening task that required coordination of both upper limbs. A Wilcoxon signed-rank test revealed significant improvement in JHFT composite scores of the affected limb at post-camp ( p = .04) and three-month follow-up ( p = .04). In addition, a significant improvement in the number of activities performed using two hands from baseline to three-month follow-up was observed ( p = .03). This pattern of improvement was also observed in the speed of completion for the box opening task. The improvement in motor function seems related to the participants' continuing performing daily activities with the affected hand and two hands after the magic camp.
- Published
- 2020
- Full Text
- View/download PDF
31. Musculoskeletal Injury in Paddle Sport Athletes.
- Author
-
Griffin AR, Perriman DM, Neeman TM, and Smith PN
- Subjects
- Adolescent, Adult, Age Distribution, Aged, Aged, 80 and over, Back Injuries epidemiology, Child, Competitive Behavior physiology, Female, Humans, Male, Middle Aged, Neck Injuries epidemiology, Physical Conditioning, Human, Risk Factors, Sex Distribution, Shoulder Injuries epidemiology, Wrist Injuries epidemiology, Young Adult, Elbow Injuries, Musculoskeletal System injuries, Water Sports injuries
- Abstract
Introduction: Kayak racing has been an Olympic sport since 1936. The sport is evolving with the introduction of ocean skis and stand-up-paddle boards (SUP). Musculoskeletal injury incidence surveys have been conducted for ultra-marathon events, but no data have been published for other racing formats., Objective: To identify and compare the rates and types of injuries sustained by paddling athletes as a function of discipline and training parameters in Sprint, Marathon, Ultra-Marathon, and Ocean events., Methods: Competitors from 6 kayak and/or ocean surf-ski races in Australia were surveyed. Before each race, competitors were asked to complete a questionnaire. The questionnaire investigated paddling-related injuries over the previous 5 years, athlete morphology, flexibility, equipment and its setup, training volume, and environment., Results: Five hundred eighty-three competitors were surveyed. Disciplines included 173 racing-kayak (K1), 202 touring-kayak, 146 ocean-skis, 42 SUP, and 20 other. The top 5 paddling-related injuries were shoulder (31%), low back (23.5%), wrist (16.5%), neck (13.7%), and elbow (11.0%). The highest percentage of injury was found in K1 paddlers for shoulder (40.5%), SUP for low back (33.3%), and ocean-ski for wrist (22.6%). After controlling for on-water training hours, the relative risk (RR) of wrist injury was significantly increased in ocean-ski paddlers (1.86) and in paddlers with decreased flexibility (1.53-1.83). Relative risk of shoulder and low-back injury was significantly increased in athletes with lower training volumes (1.82-2.07). Younger athletes had lower RR of wrist and shoulder injury (0.58-0.62).
- Published
- 2020
- Full Text
- View/download PDF
32. Life cycle expression of inbreeding depression in Eucalyptus regnans and inter-generational stability of its mixed mating system.
- Author
-
Griffin AR, Potts BM, Vaillancourt RE, and Bell JC
- Subjects
- Inbreeding, Reproduction, Selection, Genetic, Eucalyptus, Inbreeding Depression
- Abstract
Background and Aims: Many plants exhibit a mixed mating system. Published models suggest that this might be an evolutionarily stable rather than a transitional state despite the presence of inbreeding depression, but there is little empirical evidence. Through field experimentation, we studied the role of inbreeding depression in eliminating inbred progeny from the reproductive cohort of the forest tree Eucalyptus regnans, and demonstrate a stable mixed primary mating system over two successive generations., Methods: Two field experiments were conducted using seed from natural populations. We sowed open-pollinated seeds to simulate a natural regeneration event and determined isozyme genotypes of dominant and suppressed individuals over 10 years. We also planted a mixture of open-pollinated, outcross and selfed families with common maternal parentage; monitored survival of cross types over 29 years; and determined the percentage of outcrosses in open-pollinated seed from a sample of reproductively mature trees using microsatellite analysis., Key Results: Both experiments demonstrated progressive competitive elimination of inbred plants. By 29 years, the reproductive cohort in the planted experiment consisted only of outcrosses which produced seed which averaged 66 % outcrosses, similar to the estimate for the parental natural population (74 %)., Conclusions: Selective elimination of inbred genotypes during the intense intra-specific competition characteristic of the pre-reproductive phase of the life cycle of E. regnans results in a fully outcrossed reproductive population, in which self-fertility is comparable with that of its parental generation. The mixed mating system may be viewed as an unavoidable consequence of the species' reproductive ecology, which includes the demonstrated effects of inbreeding depression, rather than a strategy which is actively favoured by natural selection., (© The Author(s) 2019. Published by Oxford University Press on behalf of the Annals of Botany Company. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.)
- Published
- 2019
- Full Text
- View/download PDF
33. Hospitals Providing Temporary Emergency Department Services in Alternative Care Settings After Hurricane Sandy.
- Author
-
Griffin AR, Gable AR, Der-Martirosian C, and Dobalian A
- Subjects
- Humans, Patient Transfer organization & administration, Veterans psychology, Vulnerable Populations psychology, Cyclonic Storms, Disaster Planning organization & administration, Emergency Service, Hospital organization & administration, Emergency Shelter organization & administration, Hospitals
- Abstract
This article reports findings of a qualitative study describing how the US Department of Veterans Affairs cared for vulnerable veterans after Hurricane Sandy while medical center was closed for an extended period. This experience highlights how vulnerable patients continued to need care. Hospital preparedness planning efforts focus primarily on sheltering in place and evacuation. Research is needed to identify how hospitals provided temporary emergency services in alternative settings to inform practical guidance. Hospital planners should anticipate that their most vulnerable patients will continue to need emergency care. Viable solutions should be considered to meet immediate and long-term patient needs., (Published by Elsevier Inc.)
- Published
- 2019
- Full Text
- View/download PDF
34. Telehealth at the US Department of Veterans Affairs after Hurricane Sandy.
- Author
-
Der-Martirosian C, Griffin AR, Chu K, and Dobalian A
- Subjects
- Adult, Aged, Female, Humans, Male, Middle Aged, New York, United States, Cyclonic Storms, Natural Disasters, Telemedicine organization & administration, United States Department of Veterans Affairs organization & administration
- Abstract
Background: Like other integrated health systems, the US Department of Veterans Affairs has widely implemented telehealth during the past decade to improve access to care for its patient population. During major crises, the US Department of Veterans Affairs has the potential to transition healthcare delivery from traditional care to telecare. This paper identifies the types of Veterans Affairs telehealth services used during Hurricane Sandy (2012), and examines the patient characteristics of those users., Methods: This study conducted both quantitative and qualitative analyses. Veterans Affairs administrative and clinical data files were used to illustrate the use of telehealth services 12 months pre- and 12 months post- Hurricane Sandy. In-person interviews with 31 key informants at the Manhattan Veterans Affairs Medical Center three-months post- Hurricane Sandy were used to identify major themes related to telecare., Results: During the seven-month period of hospital closure at the Manhattan Veterans Affairs Medical Center after Hurricane Sandy, in-person patient visits decreased dramatically while telehealth visits increased substantially, suggesting that telecare was used in lieu of in-person care for some vulnerable patients. The most commonly used types of Veterans Affairs telehealth services included primary care, triage, mental health, home health, and ancillary services. Using qualitative analyses, three themes emerged from the interviews regarding the use of Veterans Affairs telecare post- Hurricane Sandy: patient safety, provision of telecare, and patient outreach., Conclusion: Telehealth offers the potential to improve post-disaster access to and coordination of care. More information is needed to better understand how telehealth can change the processes and outcomes during disasters. Future studies should also evaluate key elements, such as adequate resources, regulatory and technology issues, workflow integration, provider resistance, diagnostic fidelity and confidentiality, all of which are critical to telehealth success during disasters and other crises.
- Published
- 2019
- Full Text
- View/download PDF
35. From Brainstorming to Strategic Plan: The Framework for the Society for the Advancement of Disaster Nursing: A Work in Progress.
- Author
-
Langan JC, Lavin RP, Griffin AR, Veenema TG, and Dobalian A
- Subjects
- Civil Defense trends, Humans, Societies, Nursing organization & administration, United States, Civil Defense organization & administration, Societies, Nursing trends, Strategic Planning
- Abstract
Professional health care societies play a critical role in promoting excellence in patient care, educating and certifying their members on evidence-based practices, and pursuing relevant research agendas to advance the science in the field. Disaster nursing is a subspecialty of professional nursing characterized by a unique knowledge base and set of skills and abilities not used in normal daily health care activities. A disaster or large-scale public health emergency creates a sudden, unanticipated surge of patients with health care needs that far exceeds the capacity of the health care system. This creates a significant burden and risk for the nurses participating in the response. Recognizing the critical need to define scope of practice and core standards for disaster nursing and to promote greater nursing leadership in disaster preparedness and response, a group of subject matter experts established a professional society to provide leadership and guidance. The strategic planning process as described by M. Kwestel et al was used as the overarching framework for describing the design, development, and implementation of the new society. Establishment of the Society for the Advancement of Disaster Nursing is a definitive step toward improving national nurse readiness in the United States.
- Published
- 2019
- Full Text
- View/download PDF
36. Supporting Staff Through a Complete Hospital Evacuation and Extended Displacement Period.
- Author
-
Wyte-Lake T, Griffin AR, and Dobalian A
- Subjects
- Adult, Aged, Aged, 80 and over, Female, Humans, Male, Middle Aged, New York, Cyclonic Storms, Disaster Planning organization & administration, Disasters, Hospital Administration, Hospitals, Veterans organization & administration, Leadership, Work Engagement
- Abstract
Executive Summary: Complete hospital evacuations due to natural or man-made disasters can have repercussions on all levels of hospital operations. An extended displacement period following an evacuation exacerbates the situation. Retaining a healthy, employed workforce following a disaster is a crucial step in ensuring that a facility is effectively staffed when it returns to normal operations. In this article, the authors address the issue of staff support during evacuation and extended displacement by examining the actions taken by the leadership of the VA New York Harbor Health Care System, a Veterans Health Administration facility, in response to the evacuation and displacement caused by Superstorm Sandy in 2012. As staff began to realize that the displacement would be extensive, frustration, complaints, and a sense of disenfranchisement emerged. The authors' findings suggest that the most valuable tool to allay staffs' fears were monthly forums, whereby staff had the opportunity to meet face-to-face with leadership and ask questions. An important consideration when staff are displaced is the role that cultural differences between host and displaced facility staff plays, even when those facilities are part of the same system. Significant attention must be given to cultural differences, in both acknowledging and resolving them. The study suggests that direct communication with leadership, support from upper and middle management, and an understanding that sharing best practices across facilities strengthens the entire team are key approaches to addressing these challenges.
- Published
- 2018
- Full Text
- View/download PDF
37. Personal and professional challenges confronted by hospital staff following hurricane sandy: a qualitative assessment of management perspectives.
- Author
-
Morris AM, Ricci KA, Griffin AR, Heslin KC, and Dobalian A
- Subjects
- Disaster Planning, Humans, Interviews as Topic, New York, Qualitative Research, Transportation, United States, Cyclonic Storms, Disasters, Hospitals, Veterans organization & administration, Personnel, Hospital, United States Department of Veterans Affairs organization & administration
- Abstract
Background: Adequate hospital staffing during and after a disaster is critical to meet increased health care demands and to ensure continuity of care and patient safety. However, when a disaster occurs, staff may become both victim and responder, decreasing their ability and willingness to report for work. This qualitative study assessed the personal and professional challenges that affected staff decisions to report to work following a natural disaster and examined the role of management in addressing staff needs and concerns., Methods: Semi-structured interviews were conducted with individuals who filled key management roles in the United States Department of Veterans Affairs New York Harbor Healthcare System's response to Superstorm Sandy and during the facility's initial recovery phase. All interviews were audio recorded and transcribed. Three major themes were identified: 1) Barriers to reporting ("Barriers"), 2) Facilitators to reporting ("Facilitators"), and 3) Responses to staff needs and concerns ("Responses"). Atlas.ti 7.1.6 software program was used for the management and analysis of the transcripts., Results: Results indicated that staff encountered several barriers that impeded their ability to report to work at mobile vans at the temporarily nonoperational Manhattan campus or at two other VA facilities in Brooklyn and the Bronx in the initial post-Sandy period including transportation problems, personal property damage, and communication issues. In addition, we found evidence of facilitators to reporting as expressed through descriptions of professional duty. Our findings also revealed that management was aware of the challenges that staff was facing and made efforts to reduce barriers and accommodate staff affected by the storm., Conclusions: During and after a disaster event, hospital staff is often confronted with challenges that affect decisions to report for work and perform effectively under potentially harsh conditions. This study examined barriers and facilitators that hospital staff encountered following a major natural disaster from the management perspective. Insights gained from this study can be used to inform future disaster planning and preparedness efforts, and help ensure that there is adequate staffing to mount an effective response when a disaster occurs, and to recover from its aftermath.
- Published
- 2016
- Full Text
- View/download PDF
38. Evacuate or Shelter-in-place? The Role of Corporate Memory and Political Environment in Hospital-evacuation Decision Making.
- Author
-
Ricci KA, Griffin AR, Heslin KC, Kranke D, and Dobalian A
- Subjects
- Disaster Planning, Humans, Interviews as Topic, New York City, Public Opinion, Cyclonic Storms, Decision Making, Organizational, Emergency Shelter, Hospitals, Politics, Transportation of Patients
- Abstract
Problem: Hospital-evacuation decisions are rarely straightforward in protracted advance-warning events. Previous work provides little insight into the decision-making process around evacuation. This study was conducted to identify factors that most heavily influenced the decisions to evacuate the US Department of Veterans Affairs (VA) New York Harbor Healthcare System's (NYHHS; New York USA) Manhattan Campus before Hurricane Irene in 2011 and before Superstorm Sandy in 2012., Methods: Semi-structured interviews with 11 senior leaders were conducted on the processes and factors that influenced the evacuation decisions prior to each event., Results: The most influential factor in the decision to evacuate the Manhattan Campus before Hurricane Irene was New York City's (NYC's) hospital-evacuation mandate. As a federal facility, the Manhattan VA medical center (VAMC) was exempt from the city's order, but decision makers felt compelled to comply. In the case of Superstorm Sandy, corporate memory of a similar 1992 storm that crippled the Manhattan facility drove the decision to evacuate before the storm hit., Conclusions: Results suggest that hospital-evacuation decisions are confounded by political considerations and are influenced by past disaster experience. Greater shared situational awareness among at-risk hospitals, along with a more coordinated approach to evacuation decision making, could reduce pressure on hospitals to make these high-stakes decisions. Systematic mechanisms for collecting, documenting, and sharing lessons learned from past disasters are sorely needed at the institutional, local, and national levels.
- Published
- 2015
- Full Text
- View/download PDF
39. Modeling Evacuation of a Hospital without Electric Power.
- Author
-
Vugrin ED, Verzi SJ, Finley PD, Turnquist MA, Griffin AR, Ricci KA, and Wyte-Lake T
- Subjects
- Humans, Models, Organizational, Texas, Disaster Planning, Electricity, Hospitals, Patient Transfer
- Abstract
Hospital evacuations that occur during, or as a result of, infrastructure outages are complicated and demanding. Loss of infrastructure services can initiate a chain of events with corresponding management challenges. This report describes a modeling case study of the 2001 evacuation of the Memorial Hermann Hospital in Houston, Texas (USA). The study uses a model designed to track such cascading events following loss of infrastructure services and to identify the staff, resources, and operational adaptations required to sustain patient care and/or conduct an evacuation. The model is based on the assumption that a hospital's primary mission is to provide necessary medical care to all of its patients, even when critical infrastructure services to the hospital and surrounding areas are disrupted. Model logic evaluates the hospital's ability to provide an adequate level of care for all of its patients throughout a period of disruption. If hospital resources are insufficient to provide such care, the model recommends an evacuation. Model features also provide information to support evacuation and resource allocation decisions for optimizing care over the entire population of patients. This report documents the application of the model to a scenario designed to resemble the 2001 evacuation of the Memorial Hermann Hospital, demonstrating the model's ability to recreate the timeline of an actual evacuation. The model is also applied to scenarios demonstrating how its output can inform evacuation planning activities and timing.
- Published
- 2015
- Full Text
- View/download PDF
40. Risk factors for low back pain: insights from a novel case-control twin study.
- Author
-
Oliveira VC, Ferreira ML, Refshauge KM, Maher CG, Griffin AR, Hopper JL, and Ferreira PH
- Subjects
- Adult, Aged, Case-Control Studies, Female, Humans, Low Back Pain epidemiology, Lumbar Vertebrae, Male, Outcome Assessment, Health Care, Posture, Risk Factors, Surveys and Questionnaires, Twins, Low Back Pain etiology
- Abstract
Background Context: Previous research has failed to identify strong consistent risk factors for low back pain (LBP). A plausible solution is to conduct hypothesis-generating studies, such as twin case-control surveys., Purpose: To investigate twins' perceptions of the factors responsible for within-pair differences in LBP., Study Design: A case-control twin survey., Patient Sample: Twenty-four twin pairs that were generally and broadly discordant for LBP history., Outcome Measures: The participants' perceptions of the factors that could explain within-pair differences in LBP history., Methods: Twins were asked to identify the factors responsible for within-pair differences in LBP. Closed questioning collected information on the known risk factors and open-ended questioning was used to reveal novel factors. The frequency of risk factors was presented to investigate the individual's perception of the contribution of factors in the development of their own and/or their twin's experience of LBP., Results: The most frequent factors reported in the closed questioning related to the physical workload of the lumbar spine, specifically, the engagement in different types of work (n=23/24 pairs, 96%). Types of work included those involving heavy loads, lifting, manual tasks, awkward postures, and gardening. Single trauma or injury and vigorous physical activity participation were perceived as the contributors by 79% (n=19/24 pairs) and 88% (n=21/24 pairs) of the pairs, respectively. Open-ended questioning did not reveal new risk factors for LBP., Conclusions: Twins attributed the differences in LBP history to risk factors related to physical workload. Future studies investigating the risk factors for LBP should include valid and comprehensive assessments of these factors., (Copyright © 2015 Elsevier Inc. All rights reserved.)
- Published
- 2015
- Full Text
- View/download PDF
41. Modeling hospitals' adaptive capacity during a loss of infrastructure services.
- Author
-
Vugrin ED, Verzi SJ, Finley PD, Turnquist MA, Griffin AR, Ricci KA, and Wyte-Lake T
- Subjects
- Humans, Civil Defense, Emergencies, Hospital Administration, Hospitals, Models, Organizational
- Abstract
Resilience in hospitals - their ability to withstand, adapt to, and rapidly recover from disruptive events - is vital to their role as part of national critical infrastructure. This paper presents a model to provide planning guidance to decision makers about how to make hospitals more resilient against possible disruption scenarios. This model represents a hospital's adaptive capacities that are leveraged to care for patients during loss of infrastructure services (power, water, etc.). The model is an optimization that reallocates and substitutes resources to keep patients in a high care state or allocates resources to allow evacuation if necessary. An illustrative example demonstrates how the model might be used in practice.
- Published
- 2015
- Full Text
- View/download PDF
42. An in vivo comparison of the orientation of the transverse acetabular ligament and the acetabulum.
- Author
-
Griffin AR, Perriman DM, Bolton CJ, and Smith PN
- Subjects
- Acetabulum surgery, Female, Hip Joint anatomy & histology, Humans, Ligaments, Articular surgery, Male, Retrospective Studies, Tomography, X-Ray Computed, Acetabulum diagnostic imaging, Bone Anteversion diagnostic imaging, Hip Joint diagnostic imaging, Ligaments, Articular diagnostic imaging
- Abstract
Aligning the acetabular component with the Transverse Acetabular Ligament (TAL) to ensure optimal anteversion has been reported to reduce dislocation rates. However, to our knowledge in vivo measurement of the TAL angle has not yet been reported in a large cohort of normal hips. CT scans of 218 normal hips were analyzed. The TAL and four acetabular rim anteversion angles were measured (superiorly to inferiorly) relative to the anterior pelvic plane. The mean TAL anteversion angle was 20.5° ± 7.0°, and the acetabular rim angles from superior to inferior were 11.0° ± 12.9°, 19.9° ± 8.8°, 20.9° ± 6.2° and 25.1° ± 6.2° respectively. Both the TAL and the acetabular rim were significantly more anteverted in females than in males. The TAL anteversion angle was comparable to the predominant orientation (central rim section) of the native acetabulum while the superior acetabulum was comparatively retroverted and the inferior was relatively more anteverted., (© 2014.)
- Published
- 2014
- Full Text
- View/download PDF
43. The breeding systems of diploid and neoautotetraploid clones of Acacia mangium Willd. in a synthetic sympatric population in Vietnam.
- Author
-
Griffin AR, Vuong TD, Vaillancourt RE, Harbard JL, Harwood CE, Nghiem CQ, and Thinh HH
- Subjects
- Acacia drug effects, Alleles, Breeding, Chromosomes, Plant drug effects, Colchicine pharmacology, Crosses, Genetic, Diploidy, Flowers drug effects, Flowers genetics, Genetic Speciation, Genotype, Microsatellite Repeats, Pollen drug effects, Pollen genetics, Pollination, Reproduction, Seedlings drug effects, Seedlings genetics, Seeds drug effects, Seeds genetics, Self-Fertilization, Sympatry, Tetraploidy, Vietnam, Acacia genetics, Apomixis genetics, Chromosomes, Plant genetics, Polyploidy
- Abstract
Colchicine-induced neoautotetraploid genotypes of Acacia mangium were cloned and planted in mixture with a set of diploid clones in an orchard in southern Vietnam. Following good general flowering, open-pollinated seed was collected from trees of both cytotypes and microsatellite markers were used to determine the breeding system as characterised by the proportion of outcrosses in young seedling progeny. As predicted from the literature, the progeny of diploid clones were predominantly outcrossed (t(m) = 0.97). In contrast, the progeny of the tetraploid clones were almost entirely selfs (t(m) = 0.02; 3 of 161 seedlings assayed were tetraploid outcrosses and there were no triploids). Segregation at loci heterozygous in the tetraploid mothers followed expected ratios, indicating sexual reproduction rather than apomixis. Post-zygotic factors are primarily responsible for divergence of the breeding systems. Commonly, less than 1 % of Acacia flowers mature as a pod, and after mixed pollination, diploid outcrossed seed normally develops at the expense of selfs. Selfs of the tetraploid trees appear to express less genetic load and have a higher probability of maturing. However, this does not fully explain the observed deficiency of outcross tetraploid progeny. Presumably, there are cytogenetic reasons which remain to be investigated. In nature, selfing would increase the probability of establishment of neotetraploids irrespective of cytotype frequency in the population. Breeders need to review their open-pollinated breeding and seed production strategies. It remains to be seen whether this is an ephemeral problem, with strong fertility selection restoring potential for outcrossing over generations.
- Published
- 2012
- Full Text
- View/download PDF
44. Association of the histamine N-methyltransferase C314T (Thr105Ile) polymorphism with atopic dermatitis in Caucasian children.
- Author
-
Kennedy MJ, Loehle JA, Griffin AR, Doll MA, Kearns GL, Sullivan JE, and Hein DW
- Subjects
- Alleles, Child, Preschool, Dermatitis, Atopic drug therapy, Dermatitis, Atopic ethnology, Female, Gene Frequency, Genetic Predisposition to Disease, Genotype, Histamine Antagonists therapeutic use, Humans, Infant, Male, Mouth Mucosa drug effects, Mouth Mucosa metabolism, Mouth Mucosa pathology, Prospective Studies, Treatment Outcome, Dermatitis, Atopic genetics, Histamine N-Methyltransferase genetics, Polymorphism, Single Nucleotide, White People genetics
- Abstract
Study Objective: To investigate potential associations between the histamine N-methyltransferase (HNMT) gene, HNMT, C314T (Thr105Ile) polymorphism and atopic dermatitis in a cohort of Caucasian children., Design: Prospective, multicenter, genotype-association study., Setting: Four academic, tertiary care medical centers within the Pediatric Pharmacology Research Unit network., Participants: Two hundred forty-nine Caucasian children aged 6 months-5 years with atopic dermatitis (127 patients) or without (122 control subjects)., Intervention: Buccal swabs (one swab/cheek) were performed to obtain epithelial cells for extraction of genomic DNA., Measurements and Main Results: Data were collected on severity of atopic dermatitis, oral antihistamine treatment, and treatment response through parental report. The HNMT genotypes were successfully obtained in 116 control subjects and 122 patients with atopic dermatitis. Frequencies of the T314 variant allele (0.12 vs 0.06, p=0.04) and combined CT/TT genotype (0.24 vs 0.12, p=0.02) were significantly higher in children with atopic dermatitis compared with control subjects. Children with genotypes conferring reduced HNMT activity were 2 times more likely to have atopic dermatitis than those who were homozygous for the C314 reference allele., Conclusion: Increased histamine levels in patients with atopic dermatitis may result, at least in part, from reduced enzymatic inactivation via HNMT. Genetically associated reduction in histamine biotransformation may therefore contribute to the pathogenesis, persistence, and progression of atopic dermatitis. If confirmed, these data indicate that HNMT genotype might represent a common risk factor for development of atopic dermatitis, asthma, and allergic rhinitis and may be useful in identifying individuals who are candidates for early preventive pharmacotherapeutic intervention. Additional longitudinal studies will be required to assess the relationship between genotype, disease severity, and antihistamine response.
- Published
- 2008
- Full Text
- View/download PDF
45. Genetics of postzygotic isolation in Eucalyptus: whole-genome analysis of barriers to introgression in a wide interspecific cross of Eucalyptus grandis and E. globulus.
- Author
-
Myburg AA, Vogl C, Griffin AR, Sederoff RR, and Whetten RW
- Subjects
- Alleles, Bayes Theorem, Chi-Square Distribution, Chromosome Mapping, Chromosomes, Plant, Genetic Linkage, Genetic Markers, Hybridization, Genetic, Markov Chains, Monte Carlo Method, Pedigree, Polymorphism, Restriction Fragment Length, Species Specificity, Crosses, Genetic, Eucalyptus genetics, Genome, Plant
- Abstract
The genetic architecture of hybrid fitness characters can provide valuable insights into the nature and evolution of postzygotic reproductive barriers in diverged species. We determined the genome-wide distribution of barriers to introgression in an F(1) hybrid of two Eucalyptus tree species, Eucalyptus grandis (W. Hill ex Maiden.) and E. globulus (Labill.). Two interspecific backcross families (N = 186) were used to construct comparative, single-tree, genetic linkage maps of an F(1) hybrid individual and two backcross parents. A total of 1354 testcross AFLP marker loci were evaluated in the three parental maps and a substantial proportion (27.7% average) exhibited transmission ratio distortion (alpha = 0.05). The distorted markers were located in distinct regions of the parental maps and marker alleles within each region were all biased toward either of the two parental species. We used a Bayesian approach to estimate the position and effect of transmission ratio distorting loci (TRDLs) in the distorted regions of each parental linkage map. The relative viability of TRDL alleles ranged from 0.20 to 0.72. Contrary to expectation, heterospecific (donor) alleles of TRDLs were favored as often as recurrent alleles in both backcrosses, suggesting that positive and negative heterospecific interactions affect introgression rates in this wide interspecific pedigree.
- Published
- 2004
- Full Text
- View/download PDF
46. Comparative genetic linkage maps of Eucalyptus grandis, Eucalyptus globulus and their F1 hybrid based on a double pseudo-backcross mapping approach.
- Author
-
Myburg AA, Griffin AR, Sederoff RR, and Whetten RW
- Subjects
- Chromosomes, Plant, Genome, Plant, Inbreeding, Polymorphism, Genetic, Chromosome Mapping, Eucalyptus genetics, Genetic Linkage
- Abstract
Comparative genetic mapping in interspecific pedigrees presents a powerful approach to study genetic differentiation, genome evolution and reproductive isolation in diverging species. We used this approach for genetic analysis of an F(1) hybrid of two Eucalyptus tree species, Eucalyptus grandis (W. Hill ex Maiden.) and Eucalyptus globulus (Labill.). This wide interspecific cross is characterized by hybrid inviability and hybrid abnormality. Approximately 20% of loci in the genome of the F(1) hybrid are expected to be hemizygous due to a difference in genome size between E. grandis (640 Mbp) and E. globulus (530 Mbp). We investigated the extent of colinearity between the two genomes and the distribution of hemizygous loci in the F(1) hybrid using high-throughput, semi-automated AFLP marker analysis. Two pseudo-backcross families (backcrosses of an F(1) individual to non-parental individuals of the parental species) were each genotyped with more than 800 AFLP markers. This allowed construction of de novo comparative genetic linkage maps of the F(1) hybrid and the two backcross parents. All shared AFLP marker loci in the three single-tree parental maps were found to be colinear and little evidence was found for gross chromosomal rearrangements. Our results suggest that hemizygous AFLP loci are dispersed throughout the E. grandis chromosomes of the F(1) hybrid.
- Published
- 2003
- Full Text
- View/download PDF
47. RNASEL mutations in hereditary prostate cancer.
- Author
-
Chen H, Griffin AR, Wu YQ, Tomsho LP, Zuhlke KA, Lange EM, Gruber SB, and Cooney KA
- Subjects
- Aged, Codon, Nonsense, DNA Mutational Analysis, DNA, Neoplasm chemistry, DNA, Neoplasm genetics, Family Health, Female, Humans, Male, Middle Aged, Mutation, Mutation, Missense, Pedigree, Polymorphism, Restriction Fragment Length, Prostatic Neoplasms enzymology, Endoribonucleases genetics, Prostatic Neoplasms genetics
- Published
- 2003
- Full Text
- View/download PDF
48. Complex patterns of mating revealed in a Eucalyptus regnans seed orchard using allozyme markers and the neighbourhood model.
- Author
-
Burczyk J, Adams WT, Moran GF, and Griffin AR
- Subjects
- Australia, Crosses, Genetic, Genetic Markers, Eucalyptus physiology, Isoenzymes genetics, Models, Biological
- Abstract
The neighbourhood model apportions offspring of individual mother plants to self-fertilization, outcrossing to males within a circumscribed area around the mother plant (the neighbourhood), and outcrossing to males outside the neighbourhood. Formerly the model was applied only to haploid pollen gametes in the offspring of conifers, but is extended so that it can be used with genotypic data from diploid offspring of both angiosperms and gymnosperms. In addition, it is shown that the mating parameters can be estimated without independent estimates of allele frequencies in the pollen pools outside the neighbourhood; thus the model might be applied effectively to natural populations exposed to unknown external pollen sources. Parameters of the neighbourhood mating model were estimated for a 10-year-old seed orchard population of the insect-pollinated tree, Eucalyptus regnans, in southeast Australia, which contained a mixture of two geographical provenances (Victoria and Tasmania). The mating patterns revealed were complex. Crosses between trees of the same provenance occurred three times more often than crosses between trees of different provenances. Levels of self-fertilization and patterns of mating within neighbourhoods were influenced by provenance origin, crop fecundity and orchard position (central vs. edge) of mother trees. Gene dispersal, however, was extensive, with approximately 50% of effective pollen gametes coming from males more than 40 m away from mother trees (average distance between neighbouring trees was 7.4 m). Thus, insect pollinators are efficient promoters of cross-fertilization in this orchard, with the result that the effective number of males mating with each female is large.
- Published
- 2002
- Full Text
- View/download PDF
49. Use of random amplified polymorphic DNA (RAPD) markers in the discrimination and verification of genotypes in Eucalyptus.
- Author
-
Keil M and Griffin AR
- Abstract
We carried out four separate studies using random amplified polymorphic DNA (RAPD) markers to analyse samples of Eucalyptus supplied by several different organisations. The objective was to examine the reproducibility of the RAPD technique and its ability to discriminate between individual genotypes for verification of clonal identities. We found that RAPD profiles that are unique to a genotype can be generated reliably and simply and that even closely related genotypes can be distinguished. In addition, in each of the four studies, we detected cases where the plant material studied had been mis-sampled or mis-labelled (i.e. the RAPD profiles were not consistent with the identification numbers): (1) ramets of a Eucalyptus grandis clone were found to be derived from 2 different clones; (2) ramets labelled as 2 different Eucalyptus hybrid clones were found to be the same clone, owing to a mis-planted clonal hedge; (3) samples supplied as a single progeny of a controlled E. nitens cross were derived from two crosses involving different pairs of parents; (4) mis-labelling was detected for ramets of 4 of a set of 10 clones of E. grandis and E. camaldulensis. For three of the four studies, the detection of genotype mis-identifications was unexpected, suggesting that labelling or sampling errors during the handling of plant material are a frequent occurrence, with potentially serious economic consequences.
- Published
- 1994
- Full Text
- View/download PDF
50. Using paternity analysis to measure effective pollen dispersal in plant populations.
- Author
-
Adams WT, Griffin AR, and Moran GF
- Abstract
Paternity analysis can be used to estimate mean effective pollen dispersal (micro(d)) by sampling offspring from a mother plant and assaying each for a large number of allozyme loci. The male in the population with the highest likelihood of paternity, based entirely on the degree of genetic relationship with the offspring (transition probability) or combined with information on probability of mating with the mother plant, is inferred as the pollen parent. Computer simulations show that the mean distance between inferred males and mother plants (d) reliably estimates micro(d) in defined circumstances. If male mating success decreases with distance from the mother plant, paternity inference based entirely on transition probabilities results in d values that are upwardly biased, perhaps considerably. More reliable estimates can be obtained in this situation when prior information on the general form of the relationship between mating success and distance between mates (the distance function) is used, along with transition probabilities, to infer paternity. However, this procedure is valid only when the general form of the distance function can be reliably assumed. Computer simulations also show that the bootstrap method can be used to closely approximate the SE of .
- Published
- 1992
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.