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Wardi G, Shashikumar S, Carlile M, Krak M, Hayden S, Holder A, Nemati S. 301 Use of Transfer Learning to Improve External Validity of a Machine-Learning Algorithm to Predict Septic Shock in the Emergency Department. Ann Emerg Med 2020. [DOI: 10.1016/j.annemergmed.2020.09.316] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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2
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Campbell KL, Kam JWY, Neil-Sztramko SE, Liu Ambrose T, Handy TC, Lim HJ, Hayden S, Hsu L, Kirkham AA, Gotay CC, McKenzie DC, Boyd LA. Effect of aerobic exercise on cancer-associated cognitive impairment: A proof-of-concept RCT. Psychooncology 2017; 27:53-60. [PMID: 28075038 DOI: 10.1002/pon.4370] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [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: 04/21/2016] [Revised: 12/15/2016] [Accepted: 01/06/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND Change in cognitive ability is a commonly reported adverse effect by breast cancer survivors. The underlying etiology of cognitive complaints is unclear and to date, there is limited evidence for effective intervention strategies. Exercise has been shown to improve cognitive function in older adults and animal models treated with chemotherapy. This proof-of-concept randomized controlled trial tested the effect of aerobic exercise versus usual lifestyle on cognitive function in postmenopausal breast cancer survivors. METHODS Women, aged 40 to 65 years, postmenopausal, stages I to IIIA breast cancer, and who self-reported cognitive dysfunction following chemotherapy treatment, were recruited and randomized to a 24-week aerobic exercise intervention (EX; n = 10) or usual lifestyle control (CON; n = 9). Participants completed self-report measures of the impact of cognitive issues on quality of life (Functional Assessment of Cancer Therapy-Cognitive version 3), objective neuropsychological testing, and functional magnetic resonance imaging at baseline and 24 weeks. RESULTS Compared to CON, EX had a reduced time to complete a processing speed test (trail making test-A) (-14.2 seconds, P < .01; effect size 0.35). Compared to CON, there was no improvement in self-reported cognitive function and effect sizes were small. Interestingly, lack of between-group differences in Stroop behavioral performance was accompanied by functional changes in several brain regions of interest in EX compared to CON at 24 weeks. CONCLUSION These findings provide preliminary proof-of-concept results for the potential of aerobic exercise to improve cancer-related cognitive impairment and will serve to inform the development of future trials.
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Affiliation(s)
- K L Campbell
- Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - J W Y Kam
- Department of Psychology, University of British Columbia, Vancouver, BC, Canada
| | - S E Neil-Sztramko
- Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - T Liu Ambrose
- Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - T C Handy
- Department of Psychology, University of British Columbia, Vancouver, BC, Canada
| | - H J Lim
- Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada.,British Columbia Cancer Agency, Vancouver, BC, Canada
| | - S Hayden
- Department of Psychology, University of British Columbia, Vancouver, BC, Canada
| | - L Hsu
- Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - A A Kirkham
- Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - C C Gotay
- Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada.,British Columbia Cancer Agency, Vancouver, BC, Canada
| | - D C McKenzie
- Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - L A Boyd
- Faculty of Medicine, University of British Columbia, Vancouver, BC, Canada
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Duffy JMN, Chequer S, Braddy A, Mylan S, Royuela A, Zamora J, Ip J, Hayden S, Showell M, Kinnersley P, Chenoy R, Westwood OM, Khan KS, Cushing A. Educational effectiveness of gynaecological teaching associates: a multi-centre randomised controlled trial. BJOG 2016; 123:1005-10. [PMID: 26776314 DOI: 10.1111/1471-0528.13824] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/12/2015] [Indexed: 12/01/2022]
Abstract
OBJECTIVE To evaluate, among medical students learning the female pelvic examination, the added benefits of training by gynaecological teaching associates compared with training involving a manikin only. DESIGN Randomised controlled trial. SETTING Nine university teaching hospitals. POPULATION Ninety-four medical students recruited prior to commencing a 4-week obstetrics and gynaecology rotation. METHODS The control training consisted of lectures, demonstration of the pelvic examination on a manikin, and opportunities to practise on this low-fidelity simulation (n = 40). The experimental group received additional gynaecological teaching associate training, delivered by pairs of experienced associates to groups of four medical students (n = 54). MAIN OUTCOME MEASURES Outcomes measured at the end of the rotation included knowledge of the correct order of examination components (Yes/No), and student comfort [Likert scales anchored between 1 (very uncomfortable) and 4 (very comfortable) on four items] and confidence [Likert scales anchored between 1 (No) and 3 (Yes) on six items]. The primary outcome, measured at the end of the academic year, was the objective structured clinical examination of a female pelvis (score range 0-54). RESULTS At baseline, the groups were similar in age, gender, and ethnicity. At the end of the clinical rotation, when compared with the control intervention, the experimental intervention had a moderate effect on student knowledge [difference 29.9% (95% CI 11.2-48.6%); P = 0.002] and confidence [difference 1 (95% CI 0-2); P < 0.001], and a large effect on student comfort [difference 1.8 (95% CI 0.6-3.0); P = 0.004]. At the end of the academic year, the experimental intervention had no impact on skills compared with the control [difference 2 (95% CI-1 to 4); P = 0.26]. CONCLUSIONS Among medical students taught the female pelvic examination by low-fidelity simulation, additional training by gynaecology teaching associates improved knowledge, comfort, and confidence at the end of the clinical rotation but did not improve examination skills at end of the academic year.
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Affiliation(s)
- J M N Duffy
- Balliol College, University of Oxford, Oxford, UK
| | | | - A Braddy
- Sheffield Teaching Hospitals NHS Foundation Trust, Sheffield, UK
| | - S Mylan
- Department of Primary Care and Population Health, UCL Medical School, London, UK
| | - A Royuela
- Clinical Biostatistics Unit, Hospital Ramón y Cajal, Madrid, Spain
| | - J Zamora
- Clinical Biostatistics Unit, Hospital Ramón y Cajal, Madrid, Spain
| | - J Ip
- Department of Obstetrics and Gynaecology, Homerton University Hospital NHS Foundation Trust, London, UK
| | - S Hayden
- Clinical and Communication Skills Learning Unit, Institute of Health Sciences Education, Barts and the London School of Medicine and Dentistry, London, UK
| | - M Showell
- Cochrane Menstrual Disorders and Subfertility Group, University of Auckland, Auckland, New Zealand
| | - P Kinnersley
- Institute of Medical Education, Cardiff University, Cardiff, UK
| | - R Chenoy
- Women's Health Research Unit, Queen Mary, University of London, London, UK
| | - O M Westwood
- Clinical and Communication Skills Learning Unit, Institute of Health Sciences Education, Barts and the London School of Medicine and Dentistry, London, UK
| | - K S Khan
- Women's Health Research Unit, Queen Mary, University of London, London, UK
| | - A Cushing
- Clinical and Communication Skills Learning Unit, Institute of Health Sciences Education, Barts and the London School of Medicine and Dentistry, London, UK
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Maldonado C, Daroch D, Maiz C, Bachler J, Crovari F, Boza C, Funke R, Köckerling F, Dabic D, Maric B, Perunicic V, Aho J, Samaha M, Antiel R, Dupont S, Ballman K, Sloan J, Bingener J, Macano C, Brookes A, Samee A, Davies S, Haleem A, Hayden S, Al-Aaraji S, Beardsmore D, Cox T, Huntington C, Blair L, Prasad T, Augenstein V, Heniford BT, Bauder A, Fischer J, Kovach S. Topic: Abdominal Wall Hernia - Epigastric hernia: choice of approach, repair, results, follow up. Hernia 2015; 19 Suppl 1:S208-11. [PMID: 26518802 DOI: 10.1007/bf03355351] [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: 10/22/2022]
Affiliation(s)
- C Maldonado
- Pontificia Universidad Católica de Chile, Santiago, Chile
| | - D Daroch
- Pontificia Universidad Católica de Chile, Santiago, Chile
| | - C Maiz
- Pontificia Universidad Católica de Chile, Santiago, Chile
| | - J Bachler
- Pontificia Universidad Católica de Chile, Santiago, Chile
| | - F Crovari
- Pontificia Universidad Católica de Chile, Santiago, Chile
| | - C Boza
- Pontificia Universidad Católica de Chile, Santiago, Chile
| | - R Funke
- Pontificia Universidad Católica de Chile, Santiago, Chile
| | | | - D Dabic
- Department of surgery, General Hospital Cacak, Cacak, Serbia
| | | | | | - J Aho
- Mayo Clinic, Rochester, USA
| | | | | | | | | | | | | | - C Macano
- University Hospital of North Staffordshire, Stoke-on-Trent, UK
| | | | | | | | | | | | | | | | - T Cox
- Department of GI and Minimally Invasive Surgery, Carolinas Medical Center, Charlotte, USA
| | - C Huntington
- Department of GI and Minimally Invasive Surgery, Carolinas Medical Center, Charlotte, USA
| | - L Blair
- Department of GI and Minimally Invasive Surgery, Carolinas Medical Center, Charlotte, USA
| | - T Prasad
- Department of GI and Minimally Invasive Surgery, Carolinas Medical Center, Charlotte, USA
| | - V Augenstein
- Department of GI and Minimally Invasive Surgery, Carolinas Medical Center, Charlotte, USA
| | - B T Heniford
- Department of GI and Minimally Invasive Surgery, Carolinas Medical Center, Charlotte, USA
| | - A Bauder
- Hospital of the University of Pennsylvania, Philadelphia, USA
| | - J Fischer
- Hospital of the University of Pennsylvania, Philadelphia, USA
| | - S Kovach
- Hospital of the University of Pennsylvania, Philadelphia, USA
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Eremenko AM, Smirnova NP, Mukha IP, Naumenko AP, Belyi NM, Hayden S. Effect of gold nanoparticles on an aerosil surface on the fluorescence and Raman spectra of adsorbed tryptophan. THEOR EXP CHEM+ 2012. [DOI: 10.1007/s11237-012-9242-1] [Citation(s) in RCA: 3] [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: 11/27/2022]
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Chen Y, Rosenthal D, Kry S, Wong P, Harrelson S, Hayden S, Garden A, Schwartz D, Dong L. SU-GG-J-111: Evaluation of Reproducibility of Immobilization Device for Head-And-Neck Radiotherapy. Med Phys 2010. [DOI: 10.1118/1.3468335] [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: 11/07/2022] Open
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7
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Tofts LJ, Hayden S, Waugh MC. Effect of Botulinum Toxin type-A (Botox®) on neck pain and craniocervical headaches caused by trapezius spasm in a child with generalised joint hypermobility resulting from Noonan's Syndrome. Pediatr Rheumatol Online J 2008. [PMCID: PMC3333975 DOI: 10.1186/1546-0096-6-s1-p174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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8
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Rodriguez R, Anglin D, Hankin A, Hayden S, Phelps M, McCollough L, Hendey G. A Longitudinal Study of Emergency Medicine Residents: Malpractice Fear and Defensive Medicine. Acad Emerg Med 2007. [DOI: 10.1197/j.aem.2007.03.913] [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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9
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Braden M, Steffens P, Sidis Y, Kulda J, Bourges P, Hayden S, Kikugawa N, Maeno Y. Anisotropy of the incommensurate fluctuations in Sr2RuO4: a study with polarized neutrons. Phys Rev Lett 2004; 92:097402. [PMID: 15089512 DOI: 10.1103/physrevlett.92.097402] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2003] [Indexed: 05/24/2023]
Abstract
The anisotropy of the magnetic incommensurate fluctuations in Sr2RuO4 has been studied by inelastic neutron scattering with polarized neutrons. We find a sizable enhancement of the out-of-plane component by a factor of 2 for intermediate energy transfer, which appears to decrease for higher energies. Our results qualitatively confirm calculations of the spin-orbit coupling, but the experimental anisotropy and its energy dependence are weaker than predicted.
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Affiliation(s)
- M Braden
- II. Physikalisches Institut, Universität zu Köln, Zülpicher Strasse 77, D-50937 Köln, Germany.
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10
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Abstract
The concurrent use of an oral assessment guide and oral care algorithm proved valuable in providing a more consistent approach to the oral care of children on a particular paediatric oncology ward (Gibson et al. 1997). However, as action research was chosen to develop practice, the diagnosis of new problems was anticipated. The identification of problem areas arose from two sources-informal feedback from the practice setting and via a formal audit using a tripartite approach consisting of a structured interview, vignettes and an analysis of existing documentation. The findings firstly demonstrated that practitioners experienced problems associated with the interpretation of the information contained within the existing algorithm. Secondly, there was also strong evidence to show that the production of a second 'therapeutic' algorithm would be beneficial to patient care. Finally, to ensure clarity, minor changes were required to the oral assessment guide. By using a collaborative approach between researchers and practitioners a positive resolution to a commonly identified clinical problem was expedited.
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Affiliation(s)
- W Nelson
- Host Defence Unit, Great Ormond Street Hospital for Children NHS Trust, London WCIN 3JH, UK
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11
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Gibson F, Face S, Hayden S, Morgan N. Nursing management of chemotherapy-induced nausea and vomiting in children. Current prescribing and administration practice--is it being used to its full potential? Eur J Oncol Nurs 2000; 4:252-5. [PMID: 12849023 DOI: 10.1054/ejon.2000.0093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- F Gibson
- South Bank University & Great Ormond Street Hospital for Children NHS Trust, London, UK
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12
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Abstract
When NaI detectors are used in prompt gamma-ray neutron activation analysis devices, they are activated by neutrons that penetrate the detector. While thermal neutron filters like boron or lithium can be used to reduce this activation, it can never be completely eliminated by this approach since high energy neutrons can penetrate the detector and thermalize inside it. This activation results in the emission of prompt gamma rays from both the I and Na and the production of the radioisotopes 128I and 24Na that subsequently decay and emit their characteristic beta particles and gamma rays. The resulting three spectra represent a background for this measurement. An experimental method for obtaining these three spectra is described and results are reported for 2" x 2", 5" x 5", 6" x 6", and 1" x 6" NaI detectors using the thermal neutron beam of the NCSU PULSTAR nuclear reactor. In addition, Monte Carlo simulation programs have been developed and used for simulating these spectra. Good results have been obtained by the Monte Carlo method for the two radioisotope spectra, and it is anticipated that good results will also be obtained for the prompt gamma-ray spectrum when the I and Na coincidence schemes are known.
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Affiliation(s)
- RP Gardner
- Center for Engineering Applications of Radioisotopes, North Carolina State University, Raleigh 27695-7909, USA.
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13
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Abstract
Dissociated animal cap blastomeres of Xenopus laevis blastulae were cultured at a low Ca level (1 microM) from 9th to 18th cell cycle at 22 +/- 1 degrees C and observed by a time-lapse video recorder. Blastomeres cleaved unequally to increase variability in cell size as cell cycles progressed, but synchronously at a constant cell cycle time of about 30 min up to the 12th cleavage in diploid cells, and up to the 13th cleavage in haploid cells, regardless of their cell sizes. Thereafter, blastomeres cleaved asynchronously at varying cell cycle times in proportion to the inverse square of their radii. The transition from the cell size-independent to -dependent cell cycles occurred at the critical cell radius, 37.5 microm for the diploid and 27.9 microm for the haploid. While the protein synthesis inhibitor, cycloheximide (CHX) lengthened cell cycle times two- to six-fold, epidermal growth factor (EGF) had no significant effect on the cell cycle. CHX-treated blastomeres synchronously cleaved at a constant cell cycle time of 60 min up to the 12th cleavage. Thereafter, cell cycle times became variable in proportion to the inverse square of radii in the presence of CHX at 0.10-0.14 microg/ml, but to the inverse cube of radii at 0.18 microg/ml. The critical cell size of CHX-treated blastomeres for the transition from cell size-independent to -dependent cell cycles remained the same as that of untreated blastomeres. Frequency distributions of cell cycle times of synchronous cell cycles were monomodal with the peak at 30 min, except for CHX-treated blastomeres with the peak at 60 min. In contrast, frequency distributions of asynchronous cell cycles were polymodal with peaks at multiples of a unit time of 30-35 min. To explain these results, we propose that blastomere cytoplasm has 30-min cycles that repeatedly produce mitosis promoting factor (MPF) in a quantity proportional to the cell surface area. MPF is neutralized when it titrates a nuclear inhibitor present in a quantity proportional to the genome size, and sequestered in the nucleus. When the total amount of MPF produced exceeds the threshold required to titrate all of the inhibitor, mitosis is initiated.
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Affiliation(s)
- P Wang
- Department of Zoology, University of Toronto, Ontario, Canada
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14
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Kranabetter JM, Hayden S, Wright EF. A comparison of ectomycorrhiza communities from three conifer species planted on forest gap edges. ACTA ACUST UNITED AC 1999. [DOI: 10.1139/b99-109] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We examined the ectomycorrhiza communities on lodgepole pine (Pinus contorta var. latifolia Engelm), white spruce (Picea glauca (Moench) Voss), and subalpine fir (Abies lasiocarpa (Hook.) Nutt) seedlings planted together on mature-forest edges in northwestern British Columbia. We examined 32 seedlings of each tree species, grouped by pairs along the north and south edges of eight gaps. We found 74 morphotypes in total, with an average of 52 morphotypes per tree species. Morphotypes with emanating hyphae or strands made up 60% of the overall ectomycorrhiza community. Multihost fungi averaged almost 60% of total morphotypes in species comparisons, although some of the multihost fungi appeared to have tree host preferences. The average community similarity, based on morphotype abundance, was 52% between conifer species, and 37% for morphotypes with emanating hyphae or strands. Within planted groups, between seedlings 1-2 m apart, community similarity ranged from 2 to 40% for morphotypes with emanating hyphae or strands. In mature, mixed forests, the infrequent occurrence of many multihost ectomycorrhizae created a wide range in the probability of hyphal linkages between neighboring seedlings.Key words: ectomycorrhizae, community similarity, multiple host, host specificity, Pinus contorta, Picea glauca, Abies lasiocarpa
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Kranabetter J, Hayden S, Wright E. A comparison of ectomycorrhiza communities from three conifer species planted on forest gap edges. ACTA ACUST UNITED AC 1999. [DOI: 10.1139/cjb-77-8-1193] [Citation(s) in RCA: 8] [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: 11/22/2022]
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O'Rourke N, Tuokko H, Hayden S, Beattie BL. Early identification of dementia: Predictive validity of the clock test. Arch Clin Neuropsychol 1997. [DOI: 10.1093/arclin/12.3.257] [Citation(s) in RCA: 38] [Impact Index Per Article: 1.4] [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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O'Rourke N, Tuokko H, Hayden S, Lynn Beattie B. Early identification of dementia: predictive validity of the clock test. Arch Clin Neuropsychol 1997; 12:257-67. [PMID: 14588418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/27/2023] Open
Abstract
Various clock scoring procedures have been developed in recent years as dementia screening measures. The current longitudinal study was developed to assess the predictive validity of the Clock Test (Tuokko, Hadjistavropoulos, Miller, Horton, & Beattie, 1995). Within a sample of subjects who initially did not meet dementia criteria, Clock Test scores (drawing, setting, and reading) distinguished between those who later met criteria for dementia as compared to subjects who did not. When impaired performance was identified as falling below cut-off on two or more subtests of the Clock Test, sensitivity and specificity were found to be 91% and 95% relative to time two diagnosis. Clock errors among the current sample were compared against normal control subjects from the Canadian Study of Health and Aging (CSHA). These comparative analyses attest to the relative normality of the clinic sample at the time of their initial assessment.
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Affiliation(s)
- N O'Rourke
- Clinic for Alzheimer Disease and Related Disorders, Vancouver Hospital and Health Sciences Centre - UBC Site, Vancouver, Canada
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18
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O'Rourke N, Haverkamp BE, Rae S, Tuokko H, Hayden S, Beattie BL. Response biases as a confound to expressed burden among spousal caregivers of suspected dementia patients. Psychol Aging 1996. [PMID: 8795067 DOI: 10.1037//0882-7974.11.2.377] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Burden among family caregivers has yet to be adequately assessed relative to social desirability response sets. This study examined the impact of two different response biases relative to expressed burden among spousal caregivers of suspected dementia patients. In addition to individual social desirability, it was hypothesized that a distinct social desirability construct exists as a function of one's perception of self within relationships. As predicted, a significant inverse association was apparent between expressed burden and this systemic response bias (as measured by the Edmonds Marital Conventionality Scale), whereas this association was not apparent with a measure of individual social desirability (the Marlowe-Crowne Social Desirability Scale). This finding suggests that systemic social desirability may exist as a significant response bias.
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Affiliation(s)
- N O'Rourke
- Clinic for Alzheimer Disease and Related Disorders, Vancouver Hospital, British Columbia, Canada.
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19
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O'Rourke N, Haverkamp BE, Rae S, Tuokko H, Hayden S, Beattie BL. Response biases as a confound to expressed burden among spousal caregivers of suspected dementia patients. Psychol Aging 1996; 11:377-80. [PMID: 8795067 DOI: 10.1037/0882-7974.11.2.377] [Citation(s) in RCA: 11] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Burden among family caregivers has yet to be adequately assessed relative to social desirability response sets. This study examined the impact of two different response biases relative to expressed burden among spousal caregivers of suspected dementia patients. In addition to individual social desirability, it was hypothesized that a distinct social desirability construct exists as a function of one's perception of self within relationships. As predicted, a significant inverse association was apparent between expressed burden and this systemic response bias (as measured by the Edmonds Marital Conventionality Scale), whereas this association was not apparent with a measure of individual social desirability (the Marlowe-Crowne Social Desirability Scale). This finding suggests that systemic social desirability may exist as a significant response bias.
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Affiliation(s)
- N O'Rourke
- Clinic for Alzheimer Disease and Related Disorders, Vancouver Hospital, British Columbia, Canada.
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20
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Affiliation(s)
- T C Chan
- Department of Emergency Medicine, University of California, San Diego Medical Center 92103-8676, USA
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21
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Harbaugh RE, Schlusselberg DS, Jeffery R, Hayden S, Cromwell LD, Pluta D, English RA. Three-dimensional computed tomographic angiography in the preoperative evaluation of cerebrovascular lesions. Neurosurgery 1995; 36:320-6; discussion 326-7. [PMID: 7731512 DOI: 10.1227/00006123-199502000-00011] [Citation(s) in RCA: 74] [Impact Index Per Article: 2.6] [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: 01/26/2023] Open
Abstract
Although three-dimensional computed tomographic angiography was developed as a screening tool for use in patients with suspected cerebrovascular disease, this imaging modality has also proven to be of value in surgical planning for patients with large or unusual vascular lesions of the brain. The three-dimensional images generated by this technique yield valuable information regarding the size and configuration of intracranial aneurysms and vascular malformations, the presence and extent of intra-aneurysmal thrombus, the relationship of the vascular lesion to other cerebrovascular or skeletal structures, aneurysm wall thickness, and the presence and orientation of an aneurysm neck. The use of three-dimensional computed tomographic angiography in representative cases of patients with large or unusual cerebrovascular lesions is presented. It has been our experience that this imaging modality displays anatomical information that is not readily available from standard, intra-arterial angiography, provides better detail for surgical planning than magnetic resonance angiography, and is less expensive than either of these other imaging modalities.
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Affiliation(s)
- R E Harbaugh
- Department of Surgery, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire, USA
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22
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Zimmer NA, Hayden S, Deidan C, Loewenstein DA. Comparative performance of mildly impaired patients with Alzheimer's disease and multiple cerebral infarctions on tests of memory and functional capacity. Int Psychogeriatr 1994; 6:143-54. [PMID: 7865702 DOI: 10.1017/s1041610294001717] [Citation(s) in RCA: 4] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
There is increasing evidence that mildly impaired patients with Alzheimer's disease (AD) may be distinguished from mildly impaired patients with multi-infarct cognitive disorder (MICD) by their degree of semantic memory impairment. However, despite these observed group differences, it is unknown whether AD and MICD patients differ in their ability to perform a broad array of functional activities required for daily living and the degree to which severity of cognitive impairment is associated with functional deficits. Using a measure assessing numerous functional domains within the clinical setting, we were able to directly compare the functional capacity of mildly impaired AD and MICD patients, as well as a more cognitively impaired AD group. Although mildly impaired AD patients scored significantly lower on tests of semantic memory relative to their mildly impaired MICD counterparts, deficits in functional capacity were relatively equivalent. The AD group with more severe cognitive impairment scored lower on both memory and functional measures. A relatively high proportion of mildly impaired AD and MICD subjects evidenced impairment across a number of functional domains, suggesting that functional impairment may occur with relatively high frequency in these patient groups.
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Affiliation(s)
- N A Zimmer
- Wien Center for Alzheimer's Disease and Memory Disorders, Mount Sinai Medical Center, Miami Beach, Florida
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23
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Seeds NW, Verrall S, Friedman G, Hayden S, Gadotti D, Haffke S, Christensen K, Gardner B, McGuire P, Krystosek A. Plasminogen activators and plasminogen activator inhibitors in neural development. Ann N Y Acad Sci 1992; 667:32-40. [PMID: 1309053 DOI: 10.1111/j.1749-6632.1992.tb51592.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- N W Seeds
- Department of Biochemistry & Genetics, University of Colorado Health Sciences Center, Denver 80262
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24
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Loewenstein DA, Ardila A, Rosselli M, Hayden S, Duara R, Berkowitz N, Linn-Fuentes P, Mintzer J, Norville M, Eisdorfer C. A comparative analysis of functional status among Spanish- and English-speaking patients with dementia. J Gerontol 1992; 47:P389-94. [PMID: 1430861 DOI: 10.1093/geronj/47.6.p389] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The assessment of functional capacity is regarded as an important part of a comprehensive diagnostic work-up for dementia. However, there is a paucity of data regarding comparative functional performance among different ethnic/cultural groups. In this study, we compared Spanish- and English-speaking dementia patients and normal controls on a comprehensive functional assessment battery administered within the clinical setting. Despite equivalent levels of cognitive impairment, Spanish-speaking dementia patients evidenced more difficulties on certain functional tasks relative to their English-speaking counterparts. On the other hand, Spanish- and English-speaking controls did not differ with regards to their functional performance. Results suggest that the extent of deterioration in specific functional subskills may be related to the degree to which they have been overlearned and practiced. Further, they indicate the potential utility of direct functional assessment in both Spanish- and English-speaking populations.
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Affiliation(s)
- D A Loewenstein
- Wien Center for Alzheimer's Disease and Memory Disorders, Mount Sinai Medical Center, Miami Beach, Florida
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25
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Harbaugh RE, Schlusselberg DS, Jeffery R, Hayden S, Cromwell LD, Pluta D. Three-dimensional computerized tomography angiography in the diagnosis of cerebrovascular disease. J Neurosurg 1992; 76:408-14. [PMID: 1738019 DOI: 10.3171/jns.1992.76.3.0408] [Citation(s) in RCA: 80] [Impact Index Per Article: 2.5] [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: 12/28/2022]
Abstract
Computer-generated three-dimensional reconstruction of the intracranial vascular system obtained by contrast-enhanced computerized tomography (CT) has been used in the diagnosis of 20 patients with known or suspected intracranial cerebrovascular disease. This technique allows visualization of the intracranial vasculature without exposing patients to the risks associated with intra-arterial angiography. The color prints and videotape images generated have been used to diagnose the presence of intracranial aneurysms, arteriovenous malformations, and venous angiomas. They have also been used to rule out structural abnormalities in patients with suspected intracranial vascular pathology and to screen patients with a strong family history of intracranial aneurysm. In 11 patients who underwent both three-dimensional CT angiography and intra-arterial angiography, the diagnostic correlation was 100%. No complications from the procedures or from incorrect diagnosis have been encountered. Although this technique requires further development and clinical evaluation, the authors' early experience with three-dimensional CT angiography suggests that this may become a valuable tool in the diagnosis of patients with cerebrovascular disease.
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Affiliation(s)
- R E Harbaugh
- Section of Neurosurgery, Dartmouth-Hitchcock Medical Center, Lebanon, New Hampshire
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26
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Obarski TP, Stoller JK, Weinstein C, Hayden S. Splenic infarction. A new thrombotic manifestation of the circulating lupus anticoagulant. Cleve Clin J Med 1989; 56:174-6. [PMID: 2499427 DOI: 10.3949/ccjm.56.2.174] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Thrombotic events are occasionally associated with circulating lupus anticoagulant and may take a variety of clinical forms. The authors report a thrombotic manifestation, spontaneous isolated splenic infarction that occurred in a young man with circulating lupus anticoagulant.
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27
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Mook HA, Paul DM, Hayden S. Temperature dependence of the high-energy magnetic excitations for Ni. Phys Rev B Condens Matter 1988; 38:12058-12061. [PMID: 9946140 DOI: 10.1103/physrevb.38.12058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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28
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Hayden S, Lupin FV. Organische S�uren. Anal Bioanal Chem 1936. [DOI: 10.1007/bf01470899] [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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