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Rissmann M, Eiden M, Wade A, Poueme R, Abdoulkadiri S, Unger H, Ziegler U, Homeier T, Groschup M. Evidence for enzootic circulation of Rift Valley fever virus among livestock in Cameroon. Acta Trop 2017; 172:7-13. [PMID: 28427961 DOI: 10.1016/j.actatropica.2017.04.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 02/22/2017] [Accepted: 04/07/2017] [Indexed: 10/19/2022]
Abstract
Rift Valley fever virus (RVFV) is an arthropod-borne pathogen, causing serious epidemics in Africa and the Arabian Peninsula. In Cameroon serological data indicate the presence of RVFV, but active circulation of RVFV, causing clinical infections has not been proven yet. For this purpose we carried out a serological and molecular study on a total of 1953 randomly selected serum samples of small ruminants and cattle, which were collected in years 2013 and 2014 in Cameroon. In a first step, sera were screened serologically using a variety of assay formats to reveal RVFV specific antibodies. At the second stage, seropositive specimen were assessed for acute RVFV infections via IgM-specific ELISA and quantitative real-time RT-PCR. Our data show a significant difference in the antibody prevalence in cattle (13.5% [95% confidence interval: 11.4-15.7]) and small ruminants (3.4% [95% confidence interval: 2.3-4.7]), with indications for annual fluctuations and significant regional differences of seropositivity. One small ruminant and three bovines were eventually found to be positive in IgM ELISA and indications for viremia were found in one bovine by RVFV genome detection using quantitative real-time RT-PCR. The results of this study therefore corroborate the presence of acute RVFV-infection and its circulation in Cameroon.
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Koutoumanou E, Wade A, Cortina-Borja M. Local dependence in bivariate copulae with Beta marginals. REVISTA COLOMBIANA DE ESTADÍSTICA 2017. [DOI: 10.15446/rce.v40n2.59404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
The local dependence function (LDF) describes changes in the correlation structure of continuous bivariate random variables along their range. Bivariate density functions with Beta marginals can be used to model jointly a wide variety of data with bounded outcomes in the (0,1) range, e.g. proportions. In this paper we obtain expressions for the LDF of bivariate densities constructed using three different copula models (Frank, Gumbel and Joe) with Beta marginal distributions, present examples for each, and discuss an application of these models to analyse data collected in a study of marks obtained on a statistics exam by postgraduate students.
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Hennis PJ, Mitchell K, Gilbert-Kawai E, Bountziouka V, Wade A, Feelisch M, Grocott MP, Martin DS. Effects of dietary nitrate supplementation on symptoms of acute mountain sickness and basic physiological responses in a group of male adolescents during ascent to Mount Everest Base Camp. Nitric Oxide 2016; 60:24-31. [DOI: 10.1016/j.niox.2016.08.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2016] [Revised: 08/28/2016] [Accepted: 08/31/2016] [Indexed: 11/16/2022]
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Jawad N, Sebire NJ, Wade A, Taylor AM, Chitty LS, Arthurs OJ. Body weight lower limits of fetal postmortem MRI at 1.5 T. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2016; 48:92-97. [PMID: 26183321 DOI: 10.1002/uog.14948] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Revised: 06/10/2015] [Accepted: 07/09/2015] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To evaluate the diagnostic yield of postmortem magnetic resonance imaging (PM-MRI) compared with conventional autopsy in fetuses of early gestational age and low body weight. METHODS Fetuses of < 31 weeks' gestation that underwent 1.5-T PM-MRI and conventional autopsy were included. The findings of PM-MRI and conventional autopsy were reported blinded to each other. The reports of conventional autopsy and PM-MRI for each organ system (cardiovascular, neurological, abdominal, non-cardiac thoracic and musculoskeletal) were classified as either diagnostic or non-diagnostic. The likelihood of a non-diagnostic examination by PM-MRI was calculated according to fetal gestational age and body weight. RESULTS Full datasets were examined of 204 fetuses, with mean gestational age of 20.95 ± 3.82 weeks (range, 12.0-30.7 weeks) and body-weight range of 15.9-1872 g. Body weight was the most significant predictor of diagnostic yield of PM-MRI. There was 95% confidence that 90% of fetuses will show diagnostic images by PM-MRI for all five organ systems when fetal body weight is ≥ 535 g, but < 50% of fetuses will have all five systems diagnostic on PM-MRI when body weight is < 122 g. CONCLUSION PM-MRI is highly likely to provide adequate diagnostic images for fetuses with a body weight > 500 g. Below this weight, the diagnostic yield of standard 1.5-T PM-MRI decreases significantly. These data should help inform parents and clinicians on the suitability of performing PM-MRI in fetuses with low body weight. Copyright © 2015 ISUOG. Published by John Wiley & Sons Ltd.
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Kirkby J, Bountziouka V, Lum S, Wade A, Stocks J. Natural variability of lung function in young healthy school children. Eur Respir J 2016; 48:411-9. [PMID: 27076582 DOI: 10.1183/13993003.01795-2015] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Accepted: 02/25/2016] [Indexed: 12/31/2022]
Abstract
Knowledge about long-term variability of lung function in healthy children is essential when monitoring and treating those with respiratory disease over time. The aim of this study was to define the natural variability in spirometry in young children after an interval of 12 months.The Size and Lung function In Children study was a prospective study designed to assess spirometry and body size, shape and composition in a multi-ethnic population of London school children. 14 schools with a wide range of socioeconomic circumstances were recruited. Spirometric and anthropometric assessments and parental questionnaires pertaining to respiratory symptoms, previous medical history, pubertal status and socioeconomic circumstances were completed at baseline and ∼1 year later.Technically acceptable spirometry data on two occasions ∼1 year apart (range 9-16 months) were available in 758 children (39% boys, mean±sd age 8.1±1.6 years), 593 of whom were classified as "healthy". Mean±sd within-subject between-test variability was 0.05±0.6 z-scores, with 95% of all the children achieving a between-test variability within ±1.2 z-scores (equating to ∼13% predicted).Natural variations of up to 1.2 z-scores occur in healthy children over ∼1 year. These must be considered when interpreting results from annual reviews in those with lung disease who are otherwise stable, if unnecessary further investigations or changes in treatment are to be avoided.
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Saeed K, Dale AP, Leung E, Cusack T, Mohamed F, Lockyer G, Arnaudov S, Wade A, Moran B, Lewis G, Dryden M, Cecil T, Cepeda JA. Procalcitonin levels predict infectious complications and response to treatment in patients undergoing cytoreductive surgery for peritoneal malignancy. Eur J Surg Oncol 2015; 42:234-43. [PMID: 26560024 DOI: 10.1016/j.ejso.2015.10.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 10/05/2015] [Accepted: 10/16/2015] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND Cytoreductive-surgery for peritoneal-malignancy (PM) involves extensive intra-abdominal surgery and a massive post-operative systemic-inflammatory-response (SIRS). It is often challenging to differentiate SIRS that are solely surgery-associated from those of post-operative infections. White-Cell-Counts (WCC) and C-Reactive-Protein (CRP) are routinely used as markers for infection, but are non-specific and their elevation is often delayed in PM cases. Other markers need to be evaluated to assist early identification/prediction of post-operative infections. METHODOLOGY Prospective evaluation of serum procalcitonin (PCT), CRP and WCC in 50 patients pre-operatively (Day0), and on post-operative days (POD) 1, 3 & 6, following cytoreductive-surgery with or without splenectomy. RESULTS Day0 PCT, CRP and WCC values were within normal limits, but increasing physiologically in post-operative period without infection, with noticeable higher PCT in splenectomized patients. In our cohort post-operative infections were diagnosed in 14 patients, often within 48 h. There was a trend for faster rise in serum PCT on POD1 compared to CRP and WCC, and faster PCT decline following appropriate therapy on POD3 and POD6 when infected cases were clinically resolving while WCC and CRP continued to rise, particularly in non-spelenectomised patients. The AUC on POD1 was significantly higher for PCT (0.689) vs. WCC (0.476) and CRP (0.477) (p = 0.04). Sensitivity, specificity, positive-predictive-value and negative-predictive-values for PCT ranged between (57%-100%), (22%-74%), (33%-47%) & (81%-100%), for CRP (28%-78%), (5.5%-86%), (18%-44.4%) & (40%-75.5%) and for WCC (14%-26.5%), (65.5-80.5%), (22%-25%), (67%-70%) respectively. CONCLUSION PCT, like WCC and CRP, needs to be interpreted with extreme cautions in the context of infections post-cytoreductive-surgery and should only be used in association with other clinical and investigational findings.
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Lum S, Bountziouka V, Sonnappa S, Wade A, Cole TJ, Harding S, Wells JCK, Griffiths C, Treleaven P, Bonner R, Kirkby J, Lee S, Raywood E, Legg S, Sears D, Cottam P, Feyeraband C, Stocks J. Lung function in children in relation to ethnicity, physique and socioeconomic factors. Eur Respir J 2015; 46:1662-71. [PMID: 26493801 DOI: 10.1183/13993003.00415-2015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Accepted: 07/14/2015] [Indexed: 11/05/2022]
Abstract
Can ethnic differences in spirometry be attributed to differences in physique and socioeconomic factors?Assessments were undertaken in 2171 London primary schoolchildren on two occasions 1 year apart, whenever possible, as part of the Size and Lung function In Children (SLIC) study. Measurements included spirometry, detailed anthropometry, three-dimensional photonic scanning for regional body shape, body composition, information on ethnic ancestry, birth and respiratory history, socioeconomic circumstances, and tobacco smoke exposure.Technically acceptable spirometry was obtained from 1901 children (mean (range) age 8.3 (5.2-11.8) years, 46% boys, 35% White, 29% Black-African origin, 24% South-Asian, 12% Other/mixed) on 2767 test occasions. After adjusting for sex, age and height, forced expiratory volume in 1 s was 1.32, 0.89 and 0.51 z-score units lower in Black-African origin, South-Asian and Other/mixed ethnicity children, respectively, when compared with White children, with similar decrements for forced vital capacity (p<0.001 for all). Although further adjustment for sitting height and chest width reduced differences attributable to ethnicity by up to 16%, significant differences persisted after adjusting for all potential determinants, including socioeconomic circumstances.Ethnic differences in spirometric lung function persist despite adjusting for a wide range of potential determinants, including body physique and socioeconomic circumstances, emphasising the need to use ethnic-specific equations when interpreting results.
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Shah V, Christov G, Mukasa T, Brogan KS, Wade A, Eleftheriou D, Levin M, Tulloh RM, Almeida B, Dillon MJ, Marek J, Klein N, Brogan PA. Cardiovascular status after Kawasaki disease in the UK. Heart 2015; 101:1646-55. [PMID: 26316045 PMCID: PMC4621377 DOI: 10.1136/heartjnl-2015-307734] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 07/07/2015] [Indexed: 01/12/2023] Open
Abstract
OBJECTIVE Kawasaki disease (KD) is an acute vasculitis that causes coronary artery aneurysms (CAA) in young children. Previous studies have emphasised poor long-term outcomes for those with severe CAA. Little is known about the fate of those without CAA or patients with regressed CAA. We aimed to study long-term cardiovascular status after KD by examining the relationship between coronary artery (CA) status, endothelial injury, systemic inflammatory markers, cardiovascular risk factors (CRF), pulse-wave velocity (PWV) and carotid intima media thickness (cIMT) after KD. METHODS Circulating endothelial cells (CECs), endothelial microparticles (EMPs), soluble cell-adhesion molecules cytokines, CRF, PWV and cIMT were compared between patients with KD and healthy controls (HC). CA status of the patients with KD was classified as CAA present (CAA+) or absent (CAA-) according to their worst-ever CA status. Data are median (range). RESULTS Ninety-two KD subjects were studied, aged 11.9 years (4.3-32.2), 8.3 years (1.0-30.7) from KD diagnosis. 54 (59%) were CAA-, and 38 (41%) were CAA+. There were 51 demographically similar HC. Patients with KD had higher CECs than HC (p=0.00003), most evident in the CAA+ group (p=0.00009), but also higher in the CAA- group than HC (p=0.0010). Patients with persistent CAA had the highest CECs, but even those with regressed CAA had higher CECs than HC (p=0.011). CD105 EMPs were also higher in the KD group versus HC (p=0.04), particularly in the CAA+ group (p=0.02), with similar findings for soluble vascular cell adhesion molecule 1 and soluble intercellular adhesion molecule 1. There was no difference in PWV, cIMT, CRF or in markers of systemic inflammation in the patients with KD (CAA+ or CAA-) compared with HC. CONCLUSIONS Markers of endothelial injury persist for years after KD, including in a subset of patients without CAA.
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Arthurs OJ, Thayyil S, Pauliah SS, Jacques TS, Chong WK, Gunny R, Saunders D, Addison S, Lally P, Cady E, Jones R, Norman W, Scott R, Robertson NJ, Wade A, Chitty L, Taylor AM, Sebire NJ. Diagnostic accuracy and limitations of post-mortem MRI for neurological abnormalities in fetuses and children. Clin Radiol 2015; 70:872-80. [PMID: 26050535 DOI: 10.1016/j.crad.2015.04.008] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 03/04/2015] [Accepted: 04/13/2015] [Indexed: 10/23/2022]
Abstract
AIM To compare the diagnostic accuracy of non-invasive cerebral post-mortem magnetic resonance imaging (PMMRI) specifically for cerebral and neurological abnormalities in a series of fetuses and children, compared to conventional autopsy. MATERIALS AND METHODS Institutional ethics approval and parental consent was obtained. Pre-autopsy cerebral PMMRI was performed in a sequential prospective cohort (n = 400) of fetuses (n = 277; 185 ≤ 24 weeks and 92 > 24 weeks gestation) and children <16 years (n = 123) of age. PMMRI and conventional autopsy findings were reported blinded and independently of each other. RESULTS Cerebral PMMRI had sensitivities and specificities (95% confidence interval) of 88.4% (75.5 to 94.9), and 95.2% (92.1 to 97.1), respectively, for cerebral malformations; 100% (83.9 to 100), and 99.1% (97.2 to 99.7) for major intracranial bleeds; and 87.5% (80.1 to 92.4) and 74.1% (68 to 79.4) for overall brain pathology. Formal neuropathological examination was non-diagnostic due to maceration/autolysis in 43/277 (16%) fetuses; of these, cerebral PMMRI imaging provided clinically important information in 23 (53%). The sensitivity of PMMRI for detecting significant ante-mortem ischaemic injury was only 68% (48.4 to 82.8) overall. CONCLUSIONS PMMRI is an accurate investigational technique for identifying significant neuropathology in fetuses and children, and may provide important information even in cases where autolysis prevents formal neuropathological examination; however, PMMRI is less sensitive at detecting hypoxic-ischaemic brain injury, and may not detect rarer disorders not encountered in this study.
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Lum S, Bountziouka V, Harding S, Wade A, Lee S, Stocks J. Assessing pubertal status in multi-ethnic primary schoolchildren. Acta Paediatr 2015; 104:e45-8. [PMID: 25366342 PMCID: PMC4463762 DOI: 10.1111/apa.12850] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 10/15/2014] [Accepted: 10/30/2014] [Indexed: 11/30/2022]
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Kaestner M, Hogg J, Wade A. Application of multidimensional scaling to fMRI responses in primary visual cortex. J Vis 2014. [DOI: 10.1167/14.15.63] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Wade A, Chris E, West R. Spatiotemporal characterization of vision in Drosophila using steady state electrophysiology. J Vis 2014. [DOI: 10.1167/14.15.67] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Welbourne L, Morland A, Wade A. The impact of seasonal adaptation on unique hues. J Vis 2014. [DOI: 10.1167/14.15.28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Aasi J, Abbott BP, Abbott R, Abbott T, Abernathy MR, Accadia T, Acernese F, Ackley K, Adams C, Adams T, Addesso P, Adhikari RX, Affeldt C, Agathos M, Aggarwal N, Aguiar OD, Ain A, Ajith P, Alemic A, Allen B, Allocca A, Amariutei D, Andersen M, Anderson R, Anderson SB, Anderson WG, Arai K, Araya MC, Arceneaux C, Areeda J, Aston SM, Astone P, Aufmuth P, Aulbert C, Austin L, Aylott BE, Babak S, Baker PT, Ballardin G, Ballmer SW, Barayoga JC, Barbet M, Barish BC, Barker D, Barone F, Barr B, Barsotti L, Barsuglia M, Barton MA, Bartos I, Bassiri R, Basti A, Batch JC, Bauchrowitz J, Bauer TS, Behnke B, Bejger M, Beker MG, Belczynski C, Bell AS, Bell C, Bergmann G, Bersanetti D, Bertolini A, Betzwieser J, Beyersdorf PT, Bilenko IA, Billingsley G, Birch J, Biscans S, Bitossi M, Bizouard MA, Black E, Blackburn JK, Blackburn L, Blair D, Bloemen S, Blom M, Bock O, Bodiya TP, Boer M, Bogaert G, Bogan C, Bond C, Bondu F, Bonelli L, Bonnand R, Bork R, Born M, Boschi V, Bose S, Bosi L, Bradaschia C, Brady PR, Braginsky VB, Branchesi M, Brau JE, Briant T, Bridges DO, Brillet A, Brinkmann M, Brisson V, Brooks AF, Brown DA, Brown DD, Brückner F, Buchman S, Bulik T, Bulten HJ, Buonanno A, Burman R, Buskulic D, Buy C, Cadonati L, Cagnoli G, Bustillo JC, Calloni E, Camp JB, Campsie P, Cannon KC, Canuel B, Cao J, Capano CD, Carbognani F, Carbone L, Caride S, Castiglia A, Caudill S, Cavaglià M, Cavalier F, Cavalieri R, Celerier C, Cella G, Cepeda C, Cesarini E, Chakraborty R, Chalermsongsak T, Chamberlin SJ, Chao S, Charlton P, Chassande-Mottin E, Chen X, Chen Y, Chincarini A, Chiummo A, Cho HS, Chow J, Christensen N, Chu Q, Chua SSY, Chung S, Ciani G, Clara F, Clark JA, Cleva F, Coccia E, Cohadon PF, Colla A, Collette C, Colombini M, Cominsky L, Constancio M, Conte A, Cook D, Corbitt TR, Cordier M, Cornish N, Corpuz A, Corsi A, Costa CA, Coughlin MW, Coughlin S, Coulon JP, Countryman S, Couvares P, Coward DM, Cowart M, Coyne DC, Coyne R, Craig K, Creighton JDE, Crowder SG, Cumming A, Cunningham L, Cuoco E, Dahl K, Canton TD, Damjanic M, Danilishin SL, D'Antonio S, Danzmann K, Dattilo V, Daveloza H, Davier M, Davies GS, Daw EJ, Day R, Dayanga T, Debreczeni G, Degallaix J, Deléglise S, Del Pozzo W, Denker T, Dent T, Dereli H, Dergachev V, De Rosa R, DeRosa RT, DeSalvo R, Dhurandhar S, Díaz M, Di Fiore L, Di Lieto A, Di Palma I, Di Virgilio A, Donath A, Donovan F, Dooley KL, Doravari S, Dossa S, Douglas R, Downes TP, Drago M, Drever RWP, Driggers JC, Du Z, Dwyer S, Eberle T, Edo T, Edwards M, Effler A, Eggenstein H, Ehrens P, Eichholz J, Eikenberry SS, Endrőczi G, Essick R, Etzel T, Evans M, Evans T, Factourovich M, Fafone V, Fairhurst S, Fang Q, Farinon S, Farr B, Farr WM, Favata M, Fehrmann H, Fejer MM, Feldbaum D, Feroz F, Ferrante I, Ferrini F, Fidecaro F, Finn LS, Fiori I, Fisher RP, Flaminio R, Fournier JD, Franco S, Frasca S, Frasconi F, Frede M, Frei Z, Freise A, Frey R, Fricke TT, Fritschel P, Frolov VV, Fulda P, Fyffe M, Gair J, Gammaitoni L, Gaonkar S, Garufi F, Gehrels N, Gemme G, Genin E, Gennai A, Ghosh S, Giaime JA, Giardina KD, Giazotto A, Gill C, Gleason J, Goetz E, Goetz R, Gondan L, González G, Gordon N, Gorodetsky ML, Gossan S, Gossler S, Gouaty R, Gräf C, Graff PB, Granata M, Grant A, Gras S, Gray C, Greenhalgh RJS, Gretarsson AM, Groot P, Grote H, Grover K, Grunewald S, Guidi GM, Guido C, Gushwa K, Gustafson EK, Gustafson R, Hammer D, Hammond G, Hanke M, Hanks J, Hanna C, Hanson J, Harms J, Harry GM, Harry IW, Harstad ED, Hart M, Hartman MT, Haster CJ, Haughian K, Heidmann A, Heintze M, Heitmann H, Hello P, Hemming G, Hendry M, Heng IS, Heptonstall AW, Heurs M, Hewitson M, Hild S, Hoak D, Hodge KA, Holt K, Hooper S, Hopkins P, Hosken DJ, Hough J, Howell EJ, Hu Y, Huerta E, Hughey B, Husa S, Huttner SH, Huynh M, Huynh-Dinh T, Ingram DR, Inta R, Isogai T, Ivanov A, Iyer BR, Izumi K, Jacobson M, James E, Jang H, Jaranowski P, Ji Y, Jiménez-Forteza F, Johnson WW, Jones DI, Jones R, Jonker RJG, Ju L, K H, Kalmus P, Kalogera V, Kandhasamy S, Kang G, Kanner JB, Karlen J, Kasprzack M, Katsavounidis E, Katzman W, Kaufer H, Kawabe K, Kawazoe F, Kéfélian F, Keiser GM, Keitel D, Kelley DB, Kells W, Khalaidovski A, Khalili FY, Khazanov EA, Kim C, Kim K, Kim N, Kim NG, Kim YM, King EJ, King PJ, Kinzel DL, Kissel JS, Klimenko S, Kline J, Koehlenbeck S, Kokeyama K, Kondrashov V, Koranda S, Korth WZ, Kowalska I, Kozak DB, Kremin A, Kringel V, Królak A, Kuehn G, Kumar A, Kumar P, Kumar R, Kuo L, Kutynia A, Kwee P, Landry M, Lantz B, Larson S, Lasky PD, Lawrie C, Lazzarini A, Lazzaro C, Leaci P, Leavey S, Lebigot EO, Lee CH, Lee HK, Lee HM, Lee J, Leonardi M, Leong JR, Le Roux A, Leroy N, Letendre N, Levin Y, Levine B, Lewis J, Li TGF, Libbrecht K, Libson A, Lin AC, Littenberg TB, Litvine V, Lockerbie NA, Lockett V, Lodhia D, Loew K, Logue J, Lombardi AL, Lorenzini M, Loriette V, Lormand M, Losurdo G, Lough J, Lubinski MJ, Lück H, Luijten E, Lundgren AP, Lynch R, Ma Y, Macarthur J, Macdonald EP, MacDonald T, Machenschalk B, MacInnis M, Macleod DM, Magana-Sandoval F, Mageswaran M, Maglione C, Mailand K, Majorana E, Maksimovic I, Malvezzi V, Man N, Manca GM, Mandel I, Mandic V, Mangano V, Mangini N, Mantovani M, Marchesoni F, Marion F, Márka S, Márka Z, Markosyan A, Maros E, Marque J, Martelli F, Martin IW, Martin RM, Martinelli L, Martynov D, Marx JN, Mason K, Masserot A, Massinger TJ, Matichard F, Matone L, Matzner RA, Mavalvala N, Mazumder N, Mazzolo G, McCarthy R, McClelland DE, McGuire SC, McIntyre G, McIver J, McLin K, Meacher D, Meadors GD, Mehmet M, Meidam J, Meinders M, Melatos A, Mendell G, Mercer RA, Meshkov S, Messenger C, Meyers P, Miao H, Michel C, Mikhailov EE, Milano L, Milde S, Miller J, Minenkov Y, Mingarelli CMF, Mishra C, Mitra S, Mitrofanov VP, Mitselmakher G, Mittleman R, Moe B, Moesta P, Mohan M, Mohapatra SRP, Moraru D, Moreno G, Morgado N, Morriss SR, Mossavi K, Mours B, Mow-Lowry CM, Mueller CL, Mueller G, Mukherjee S, Mullavey A, Munch J, Murphy D, Murray PG, Mytidis A, Nagy MF, Kumar DN, Nardecchia I, Naticchioni L, Nayak RK, Necula V, Nelemans G, Neri I, Neri M, Newton G, Nguyen T, Nitz A, Nocera F, Nolting D, Normandin MEN, Nuttall LK, Ochsner E, O'Dell J, Oelker E, Oh JJ, Oh SH, Ohme F, Oppermann P, O'Reilly B, O'Shaughnessy R, Osthelder C, Ottaway DJ, Ottens RS, Overmier H, Owen BJ, Padilla C, Pai A, Palashov O, Palomba C, Pan H, Pan Y, Pankow C, Paoletti F, Paoletti R, Paris H, Pasqualetti A, Passaquieti R, Passuello D, Pedraza M, Penn S, Perreca A, Phelps M, Pichot M, Pickenpack M, Piergiovanni F, Pierro V, Pinard L, Pinto IM, Pitkin M, Poeld J, Poggiani R, Poteomkin A, Powell J, Prasad J, Premachandra S, Prestegard T, Price LR, Prijatelj M, Privitera S, Prodi GA, Prokhorov L, Puncken O, Punturo M, Puppo P, Qin J, Quetschke V, Quintero E, Quiroga G, Quitzow-James R, Raab FJ, Rabeling DS, Rácz I, Radkins H, Raffai P, Raja S, Rajalakshmi G, Rakhmanov M, Ramet C, Ramirez K, Rapagnani P, Raymond V, Re V, Read J, Reed CM, Regimbau T, Reid S, Reitze DH, Rhoades E, Ricci F, Riles K, Robertson NA, Robinet F, Rocchi A, Rodruck M, Rolland L, Rollins JG, Romano JD, Romano R, Romanov G, Romie JH, Rosińska D, Rowan S, Rüdiger A, Ruggi P, Ryan K, Salemi F, Sammut L, Sandberg V, Sanders JR, Sannibale V, Santiago-Prieto I, Saracco E, Sassolas B, Sathyaprakash BS, Saulson PR, Savage R, Scheuer J, Schilling R, Schnabel R, Schofield RMS, Schreiber E, Schuette D, Schutz BF, Scott J, Scott SM, Sellers D, Sengupta AS, Sentenac D, Sequino V, Sergeev A, Shaddock D, Shah S, Shahriar MS, Shaltev M, Shapiro B, Shawhan P, Shoemaker DH, Sidery TL, Siellez K, Siemens X, Sigg D, Simakov D, Singer A, Singer L, Singh R, Sintes AM, Slagmolen BJJ, Slutsky J, Smith JR, Smith M, Smith RJE, Smith-Lefebvre ND, Son EJ, Sorazu B, Souradeep T, Sperandio L, Staley A, Stebbins J, Steinlechner J, Steinlechner S, Stephens BC, Steplewski S, Stevenson S, Stone R, Stops D, Strain KA, Straniero N, Strigin S, Sturani R, Stuver AL, Summerscales TZ, Susmithan S, Sutton PJ, Swinkels B, Tacca M, Talukder D, Tanner DB, Tarabrin SP, Taylor R, Ter Braack APM, Thirugnanasambandam MP, Thomas M, Thomas P, Thorne KA, Thorne KS, Thrane E, Tiwari V, Tokmakov KV, Tomlinson C, Toncelli A, Tonelli M, Torre O, Torres CV, Torrie CI, Travasso F, Traylor G, Tse M, Ugolini D, Unnikrishnan CS, Urban AL, Urbanek K, Vahlbruch H, Vajente G, Valdes G, Vallisneri M, van den Brand JFJ, Van Den Broeck C, van der Putten S, van der Sluys MV, van Heijningen J, van Veggel AA, Vass S, Vasúth M, Vaulin R, Vecchio A, Vedovato G, Veitch J, Veitch PJ, Venkateswara K, Verkindt D, Verma SS, Vetrano F, Viceré A, Vincent-Finley R, Vinet JY, Vitale S, Vo T, Vocca H, Vorvick C, Vousden WD, Vyachanin SP, Wade A, Wade L, Wade M, Walker M, Wallace L, Wang M, Wang X, Ward RL, Was M, Weaver B, Wei LW, Weinert M, Weinstein AJ, Weiss R, Welborn T, Wen L, Wessels P, West M, Westphal T, Wette K, Whelan JT, White DJ, Whiting BF, Wiesner K, Wilkinson C, Williams K, Williams L, Williams R, Williams T, Williamson AR, Willis JL, Willke B, Wimmer M, Winkler W, Wipf CC, Wiseman AG, Wittel H, Woan G, Worden J, Yablon J, Yakushin I, Yamamoto H, Yancey CC, Yang H, Yang Z, Yoshida S, Yvert M, Zadrożny A, Zanolin M, Zendri JP, Zhang F, Zhang L, Zhao C, Zhu XJ, Zucker ME, Zuraw S, Zweizig J. Improved upper limits on the stochastic gravitational-wave background from 2009-2010 LIGO and Virgo data. PHYSICAL REVIEW LETTERS 2014; 113:231101. [PMID: 25526109 DOI: 10.1103/physrevlett.113.231101] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Indexed: 06/04/2023]
Abstract
Gravitational waves from a variety of sources are predicted to superpose to create a stochastic background. This background is expected to contain unique information from throughout the history of the Universe that is unavailable through standard electromagnetic observations, making its study of fundamental importance to understanding the evolution of the Universe. We carry out a search for the stochastic background with the latest data from the LIGO and Virgo detectors. Consistent with predictions from most stochastic gravitational-wave background models, the data display no evidence of a stochastic gravitational-wave signal. Assuming a gravitational-wave spectrum of Ω_{GW}(f)=Ω_{α}(f/f_{ref})^{α}, we place 95% confidence level upper limits on the energy density of the background in each of four frequency bands spanning 41.5-1726 Hz. In the frequency band of 41.5-169.25 Hz for a spectral index of α=0, we constrain the energy density of the stochastic background to be Ω_{GW}(f)<5.6×10^{-6}. For the 600-1000 Hz band, Ω_{GW}(f)<0.14(f/900 Hz)^{3}, a factor of 2.5 lower than the best previously reported upper limits. We find Ω_{GW}(f)<1.8×10^{-4} using a spectral index of zero for 170-600 Hz and Ω_{GW}(f)<1.0(f/1300 Hz)^{3} for 1000-1726 Hz, bands in which no previous direct limits have been placed. The limits in these four bands are the lowest direct measurements to date on the stochastic background. We discuss the implications of these results in light of the recent claim by the BICEP2 experiment of the possible evidence for inflationary gravitational waves.
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Arthurs OJ, Thayyil S, Owens CM, Olsen OE, Wade A, Addison S, Jones R, Norman W, Scott RJ, Robertson NJ, Taylor AM, Chitty LS, Sebire NJ. Diagnostic accuracy of post mortem MRI for abdominal abnormalities in foetuses and children. Eur J Radiol 2014; 84:474-481. [PMID: 25533719 DOI: 10.1016/j.ejrad.2014.11.030] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Revised: 10/20/2014] [Accepted: 11/20/2014] [Indexed: 10/24/2022]
Abstract
BACKGROUND To compare the diagnostic accuracy of post-mortem magnetic resonance imaging (PMMR) specifically for abdominal pathology in foetuses and children, compared to conventional autopsy. METHODS Institutional ethics approval and parental consent was obtained. 400 unselected foetuses and children underwent PMMR using a 1.5T Siemens Avanto MR scanner before conventional autopsy. PMMR images and autopsy findings were reported blinded to the other data respectively. RESULTS Abdominal abnormalities were found in 70/400 (12%) autopsies. Overall sensitivity and specificity (95% confidence interval) of PMMR for abdominal pathology was 72.5% (61.0, 81.6) and 90.8% (87.0, 93.6), with positive (PPV) and negative predictive values (NPV) of 64.1% (53.0, 73.9) and 93.6% (90.2, 95.8) respectively. PMMR was good at detecting renal abnormalities (sensitivity 80%), particularly in foetuses, and relatively poor at detecting intestinal abnormalities (sensitivity 50%). Overall accuracy was 87.4% (83.6, 90.4). CONCLUSIONS PMMR has high overall accuracy for abdominal pathology in foetuses, newborns and children. PMMR is particularly good at detecting renal abnormalities, and relatively poor at detecting intestinal abnormalities. In clinical practice, PMMR may be a useful alternative or adjunct to conventional autopsy in foetuses and children for detecting abdominal abnormalities.
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Watson W, Macko M, Zeno B, Wade A, Moreland J, Zigmont J. A Unique Hybrid Simulation Used to Train General Surgery Residents in the Cognitive and Procedural Aspects of Emergency Department Thoracotomy. Chest 2014. [DOI: 10.1378/chest.1982812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Arthurs OJ, Thayyil S, Olsen OE, Addison S, Wade A, Jones R, Norman W, Scott RJ, Robertson NJ, Taylor AM, Chitty LS, Sebire NJ, Owens CM. Diagnostic accuracy of post-mortem MRI for thoracic abnormalities in fetuses and children. Eur Radiol 2014; 24:2876-84. [PMID: 25173624 PMCID: PMC4182596 DOI: 10.1007/s00330-014-3313-8] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 05/07/2014] [Accepted: 07/03/2014] [Indexed: 11/30/2022]
Abstract
Objectives To compare the diagnostic accuracy of post-mortem magnetic resonance imaging (PMMR) specifically for non-cardiac thoracic pathology in fetuses and children, compared with conventional autopsy. Methods Institutional ethics approval and parental consent was obtained. A total of 400 unselected fetuses and children underwent PMMR before conventional autopsy, reported blinded to the other dataset. Results Of 400 non-cardiac thoracic abnormalities, 113 (28 %) were found at autopsy. Overall sensitivity and specificity (95 % confidence interval) of PMMR for any thoracic pathology was poor at 39.6 % (31.0, 48.9) and 85.5 % (80.7, 89.2) respectively, with positive predictive value (PPV) 53.7 % (42.9, 64.0) and negative predictive value (NPV) 77.0 % (71.8, 81.4). Overall agreement was 71.8 % (67.1, 76.2). PMMR was most sensitive at detecting anatomical abnormalities, including pleural effusions and lung or thoracic hypoplasia, but particularly poor at detecting infection. Conclusions PMMR currently has relatively poor diagnostic detection rates for the commonest intra-thoracic pathologies identified at autopsy in fetuses and children, including respiratory tract infection and diffuse alveolar haemorrhage. The reasonable NPV suggests that normal thoracic appearances at PMMR exclude the majority of important thoracic lesions at autopsy, and so could be useful in the context of minimally invasive autopsy for detecting non-cardiac thoracic abnormalities. Key Points • PMMR has relatively poor diagnostic detection rates for common intrathoracic pathology • The moderate NPV suggests that normal PMMR appearances exclude most important abnormalities • Lung sampling at autopsy remains the “gold standard” for pulmonary pathology
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Arthurs OJ, Thayyil S, Addison S, Wade A, Jones R, Norman W, Scott R, Robertson NJ, Chitty LS, Taylor AM, Sebire NJ, Offiah AC. Diagnostic accuracy of postmortem MRI for musculoskeletal abnormalities in fetuses and children. Prenat Diagn 2014; 34:1254-61. [DOI: 10.1002/pd.4460] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Revised: 07/04/2014] [Accepted: 07/05/2014] [Indexed: 11/07/2022]
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Phillips JJ, Wade A, Tran VM, McKinney A. EXTRACELLULAR REGULATORS OF GLIOBLASTOMA SIGNALING. Neuro Oncol 2014. [DOI: 10.1093/neuonc/nou206.65] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Knowles RL, Day T, Wade A, Bull C, Wren C, Dezateux C. Patient-reported quality of life outcomes for children with serious congenital heart defects. Arch Dis Child 2014; 99:413-9. [PMID: 24406805 PMCID: PMC3995241 DOI: 10.1136/archdischild-2013-305130] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2013] [Revised: 12/02/2013] [Accepted: 12/13/2013] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To compare patient-reported, health-related quality of life (QoL) for children with serious congenital heart defects (CHDs) and unaffected classmates and to investigate the demographic and clinical factors influencing QoL. DESIGN Retrospective cohort study. SETTING UK National Health Service. PATIENTS UK-wide cohort of children with serious CHDs aged 10-14 years requiring cardiac intervention in the first year of life in one of 17 UK paediatric cardiac surgical centres operating during 1992-1995. A comparison group of classmates of similar age and sex was recruited. MAIN OUTCOME MEASURES Child self-report of health-related QoL scores (Pediatric Quality of Life Inventory, PedsQL) and parental report of schooling and social activities. RESULTS Questionnaires were completed by 477 children with CHDs (56% boys; mean age 12.1 (SD 1.0) years) and 464 classmates (55%; 12.0 (SD 1.1) years). Children with CHDs rated QoL significantly lower than classmates (CHDs: median 78.3 (IQR 65.0-88.6); classmates: 88.0 (80.2-94.6)) and scored lower on physical (CHDs: 84.4; classmates: 93.8; difference 9.4 (7.8 to 10.9)) and psychosocial functioning subscales (CHDs: 76.7, classmates: 85.0; difference 8.3 (6.0 to 10.6)). Cardiac interventions, school absence, regular medications and non-cardiac comorbidities were independently associated with reduced QoL. Participation in sport positively influenced QoL and was associated with higher psychosocial functioning scores. CONCLUSIONS Children with serious CHDs experience lower QoL than unaffected classmates. This appears related to the burden of clinical intervention rather than underlying cardiac diagnosis. Participation in sports activities is positively associated with increased emotional well-being. Child self-report measures of QoL would be a valuable addition to clinical outcome audit in this age group.
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Aasi J, Abadie J, Abbott BP, Abbott R, Abbott T, Abernathy MR, Accadia T, Acernese F, Adams C, Adams T, Adhikari RX, Affeldt C, Agathos M, Aggarwal N, Aguiar OD, Ajith P, Allen B, Allocca A, Amador Ceron E, Amariutei D, Anderson RA, Anderson SB, Anderson WG, Arai K, Araya MC, Arceneaux C, Areeda J, Ast S, Aston SM, Astone P, Aufmuth P, Aulbert C, Austin L, Aylott BE, Babak S, Baker PT, Ballardin G, Ballmer SW, Barayoga JC, Barker D, Barnum SH, Barone F, Barr B, Barsotti L, Barsuglia M, Barton MA, Bartos I, Bassiri R, Basti A, Batch J, Bauchrowitz J, Bauer TS, Bebronne M, Behnke B, Bejger M, Beker MG, Bell AS, Bell C, Belopolski I, Bergmann G, Berliner JM, Bersanetti D, Bertolini A, Bessis D, Betzwieser J, Beyersdorf PT, Bhadbhade T, Bilenko IA, Billingsley G, Birch J, Bitossi M, Bizouard MA, Black E, Blackburn JK, Blackburn L, Blair D, Blom M, Bock O, Bodiya TP, Boer M, Bogan C, Bond C, Bondu F, Bonelli L, Bonnand R, Bork R, Born M, Boschi V, Bose S, Bosi L, Bowers J, Bradaschia C, Brady PR, Braginsky VB, Branchesi M, Brannen CA, Brau JE, Breyer J, Briant T, Bridges DO, Brillet A, Brinkmann M, Brisson V, Britzger M, Brooks AF, Brown DA, Brown DD, Brückner F, Bulik T, Bulten HJ, Buonanno A, Buskulic D, Buy C, Byer RL, Cadonati L, Cagnoli G, Calderón Bustillo J, Calloni E, Camp JB, Campsie P, Cannon KC, Canuel B, Cao J, Capano CD, Carbognani F, Carbone L, Caride S, Castiglia A, Caudill S, Cavaglià M, Cavalier F, Cavalieri R, Cella G, Cepeda C, Cesarini E, Chakraborty R, Chalermsongsak T, Chao S, Charlton P, Chassande-Mottin E, Chen X, Chen Y, Chincarini A, Chiummo A, Cho HS, Chow J, Christensen N, Chu Q, Chua SSY, Chung S, Ciani G, Clara F, Clark DE, Clark JA, Cleva F, Coccia E, Cohadon PF, Colla A, Colombini M, Constancio M, Conte A, Conte R, Cook D, Corbitt TR, Cordier M, Cornish N, Corsi A, Costa CA, Coughlin MW, Coulon JP, Countryman S, Couvares P, Coward DM, Cowart M, Coyne DC, Craig K, Creighton JDE, Creighton TD, Crowder SG, Cumming A, Cunningham L, Cuoco E, Dahl K, Dal Canton T, Damjanic M, Danilishin SL, D'Antonio S, Danzmann K, Dattilo V, Daudert B, Daveloza H, Davier M, Davies GS, Daw EJ, Day R, Dayanga T, De Rosa R, Debreczeni G, Degallaix J, Del Pozzo W, Deleeuw E, Deléglise S, Denker T, Dent T, Dereli H, Dergachev V, DeRosa R, DeSalvo R, Dhurandhar S, Di Fiore L, Di Lieto A, Di Palma I, Di Virgilio A, Díaz M, Dietz A, Dmitry K, Donovan F, Dooley KL, Doravari S, Drago M, Drever RWP, Driggers JC, Du Z, Dumas JC, Dwyer S, Eberle T, Edwards M, Effler A, Ehrens P, Eichholz J, Eikenberry SS, Endrőczi G, Essick R, Etzel T, Evans K, Evans M, Evans T, Factourovich M, Fafone V, Fairhurst S, Fang Q, Farinon S, Farr B, Farr W, Favata M, Fazi D, Fehrmann H, Feldbaum D, Ferrante I, Ferrini F, Fidecaro F, Finn LS, Fiori I, Fisher R, Flaminio R, Foley E, Foley S, Forsi E, Fotopoulos N, Fournier JD, Franco S, Frasca S, Frasconi F, Frede M, Frei M, Frei Z, Freise A, Frey R, Fricke TT, Fritschel P, Frolov VV, Fujimoto MK, Fulda P, Fyffe M, Gair J, Gammaitoni L, Garcia J, Garufi F, Gehrels N, Gemme G, Genin E, Gennai A, Gergely L, Ghosh S, Giaime JA, Giampanis S, Giardina KD, Giazotto A, Gil-Casanova S, Gill C, Gleason J, Goetz E, Goetz R, Gondan L, González G, Gordon N, Gorodetsky ML, Gossan S, Goßler S, Gouaty R, Graef C, Graff PB, Granata M, Grant A, Gras S, Gray C, Greenhalgh RJS, Gretarsson AM, Griffo C, Groot P, Grote H, Grover K, Grunewald S, Guidi GM, Guido C, Gushwa KE, Gustafson EK, Gustafson R, Hall B, Hall E, Hammer D, Hammond G, Hanke M, Hanks J, Hanna C, Hanson J, Harms J, Harry GM, Harry IW, Harstad ED, Hartman MT, Haughian K, Hayama K, Heefner J, Heidmann A, Heintze M, Heitmann H, Hello P, Hemming G, Hendry M, Heng IS, Heptonstall AW, Heurs M, Hild S, Hoak D, Hodge KA, Holt K, Holtrop M, Hong T, Hooper S, Horrom T, Hosken DJ, Hough J, Howell EJ, Hu Y, Hua Z, Huang V, Huerta EA, Hughey B, Husa S, Huttner SH, Huynh M, Huynh-Dinh T, Iafrate J, Ingram DR, Inta R, Isogai T, Ivanov A, Iyer BR, Izumi K, Jacobson M, James E, Jang H, Jang YJ, Jaranowski P, Jiménez-Forteza F, Johnson WW, Jones D, Jones DI, Jones R, Jonker RJG, Ju L, K H, Kalmus P, Kalogera V, Kandhasamy S, Kang G, Kanner JB, Kasprzack M, Kasturi R, Katsavounidis E, Katzman W, Kaufer H, Kaufman K, Kawabe K, Kawamura S, Kawazoe F, Kéfélian F, Keitel D, Kelley DB, Kells W, Keppel DG, Khalaidovski A, Khalili FY, Khazanov EA, Kim BK, Kim C, Kim K, Kim N, Kim W, Kim YM, King EJ, King PJ, Kinzel DL, Kissel JS, Klimenko S, Kline J, Koehlenbeck S, Kokeyama K, Kondrashov V, Koranda S, Korth WZ, Kowalska I, Kozak D, Kremin A, Kringel V, Królak A, Kucharczyk C, Kudla S, Kuehn G, Kumar A, Kumar P, Kumar R, Kurdyumov R, Kwee P, Landry M, Lantz B, Larson S, Lasky PD, Lawrie C, Lazzarini A, Le Roux A, Leaci P, Lebigot EO, Lee CH, Lee HK, Lee HM, Lee J, Lee J, Leonardi M, Leong JR, Leroy N, Letendre N, Levine B, Lewis JB, Lhuillier V, Li TGF, Lin AC, Littenberg TB, Litvine V, Liu F, Liu H, Liu Y, Liu Z, Lloyd D, Lockerbie NA, Lockett V, Lodhia D, Loew K, Logue J, Lombardi AL, Lorenzini M, Loriette V, Lormand M, Losurdo G, Lough J, Luan J, Lubinski MJ, Lück H, Lundgren AP, Macarthur J, Macdonald E, Machenschalk B, MacInnis M, Macleod DM, Magana-Sandoval F, Mageswaran M, Mailand K, Majorana E, Maksimovic I, Malvezzi V, Man N, Manca GM, Mandel I, Mandic V, Mangano V, Mantovani M, Marchesoni F, Marion F, Márka S, Márka Z, Markosyan A, Maros E, Marque J, Martelli F, Martin IW, Martin RM, Martinelli L, Martynov D, Marx JN, Mason K, Masserot A, Massinger TJ, Matichard F, Matone L, Matzner RA, Mavalvala N, May G, Mazumder N, Mazzolo G, McCarthy R, McClelland DE, McGuire SC, McIntyre G, McIver J, Meacher D, Meadors GD, Mehmet M, Meidam J, Meier T, Melatos A, Mendell G, Mercer RA, Meshkov S, Messenger C, Meyer MS, Miao H, Michel C, Mikhailov EE, Milano L, Miller J, Minenkov Y, Mingarelli CMF, Mitra S, Mitrofanov VP, Mitselmakher G, Mittleman R, Moe B, Mohan M, Mohapatra SRP, Mokler F, Moraru D, Moreno G, Morgado N, Mori T, Morriss SR, Mossavi K, Mours B, Mow-Lowry CM, Mueller CL, Mueller G, Mukherjee S, Mullavey A, Munch J, Murphy D, Murray PG, Mytidis A, Nagy MF, Nanda Kumar D, Nardecchia I, Nash T, Naticchioni L, Nayak R, Necula V, Nelemans G, Neri I, Neri M, Newton G, Nguyen T, Nishida E, Nishizawa A, Nitz A, Nocera F, Nolting D, Normandin ME, Nuttall LK, Ochsner E, O'Dell J, Oelker E, Ogin GH, Oh JJ, Oh SH, Ohme F, Oppermann P, O'Reilly B, Ortega Larcher W, O'Shaughnessy R, Osthelder C, Ott CD, Ottaway DJ, Ottens RS, Ou J, Overmier H, Owen BJ, Padilla C, Pai A, Palomba C, Pan Y, Pankow C, Paoletti F, Paoletti R, Papa MA, Paris H, Pasqualetti A, Passaquieti R, Passuello D, Pedraza M, Peiris P, Penn S, Perreca A, Phelps M, Pichot M, Pickenpack M, Piergiovanni F, Pierro V, Pinard L, Pindor B, Pinto IM, Pitkin M, Poeld J, Poggiani R, Poole V, Poux C, Predoi V, Prestegard T, Price LR, Prijatelj M, Principe M, Privitera S, Prix R, Prodi GA, Prokhorov L, Puncken O, Punturo M, Puppo P, Quetschke V, Quintero E, Quitzow-James R, Raab FJ, Rabeling DS, Rácz I, Radkins H, Raffai P, Raja S, Rajalakshmi G, Rakhmanov M, Ramet C, Rapagnani P, Raymond V, Re V, Reed CM, Reed T, Regimbau T, Reid S, Reitze DH, Ricci F, Riesen R, Riles K, Robertson NA, Robinet F, Rocchi A, Roddy S, Rodriguez C, Rodruck M, Roever C, Rolland L, Rollins JG, Romano R, Romanov G, Romie JH, Rosińska D, Rowan S, Rüdiger A, Ruggi P, Ryan K, Salemi F, Sammut L, Sandberg V, Sanders J, Sannibale V, Santiago-Prieto I, Saracco E, Sassolas B, Sathyaprakash BS, Saulson PR, Savage R, Schilling R, Schnabel R, Schofield RMS, Schreiber E, Schuette D, Schulz B, Schutz BF, Schwinberg P, Scott J, Scott SM, Seifert F, Sellers D, Sengupta AS, Sentenac D, Sergeev A, Shaddock D, Shah S, Shahriar MS, Shaltev M, Shapiro B, Shawhan P, Shoemaker DH, Sidery TL, Siellez K, Siemens X, Sigg D, Simakov D, Singer A, Singer L, Sintes AM, Skelton GR, Slagmolen BJJ, Slutsky J, Smith JR, Smith MR, Smith RJE, Smith-Lefebvre ND, Soden K, Son EJ, Sorazu B, Souradeep T, Sperandio L, Staley A, Steinert E, Steinlechner J, Steinlechner S, Steplewski S, Stevens D, Stochino A, Stone R, Strain KA, Straniero N, Strigin S, Stroeer AS, Sturani R, Stuver AL, Summerscales TZ, Susmithan S, Sutton PJ, Swinkels B, Szeifert G, Tacca M, Talukder D, Tang L, Tanner DB, Tarabrin SP, Taylor R, ter Braack APM, Thirugnanasambandam MP, Thomas M, Thomas P, Thorne KA, Thorne KS, Thrane E, Tiwari V, Tokmakov KV, Tomlinson C, Toncelli A, Tonelli M, Torre O, Torres CV, Torrie CI, Travasso F, Traylor G, Tse M, Ugolini D, Unnikrishnan CS, Vahlbruch H, Vajente G, Vallisneri M, van den Brand JFJ, Van Den Broeck C, van der Putten S, van der Sluys MV, van Heijningen J, van Veggel AA, Vass S, Vasúth M, Vaulin R, Vecchio A, Vedovato G, Veitch J, Veitch PJ, Venkateswara K, Verkindt D, Verma S, Vetrano F, Viceré A, Vincent-Finley R, Vinet JY, Vitale S, Vlcek B, Vo T, Vocca H, Vorvick C, Vousden WD, Vrinceanu D, Vyachanin SP, Wade A, Wade L, Wade M, Waldman SJ, Walker M, Wallace L, Wan Y, Wang J, Wang M, Wang X, Wanner A, Ward RL, Was M, Weaver B, Wei LW, Weinert M, Weinstein AJ, Weiss R, Welborn T, Wen L, Wessels P, West M, Westphal T, Wette K, Whelan JT, Whitcomb SE, White DJ, Whiting BF, Wibowo S, Wiesner K, Wilkinson C, Williams L, Williams R, Williams T, Willis JL, Willke B, Wimmer M, Winkelmann L, Winkler W, Wipf CC, Wittel H, Woan G, Worden J, Yablon J, Yakushin I, Yamamoto H, Yancey CC, Yang H, Yeaton-Massey D, Yoshida S, Yum H, Yvert M, Zadrożny A, Zanolin M, Zendri JP, Zhang F, Zhang L, Zhao C, Zhu H, Zhu XJ, Zotov N, Zucker ME, Zweizig J. Constraints on cosmic strings from the LIGO-Virgo gravitational-wave detectors. PHYSICAL REVIEW LETTERS 2014; 112:131101. [PMID: 24745400 DOI: 10.1103/physrevlett.112.131101] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2013] [Indexed: 06/03/2023]
Abstract
Cosmic strings can give rise to a large variety of interesting astrophysical phenomena. Among them, powerful bursts of gravitational waves (GWs) produced by cusps are a promising observational signature. In this Letter we present a search for GWs from cosmic string cusps in data collected by the LIGO and Virgo gravitational wave detectors between 2005 and 2010, with over 625 days of live time. We find no evidence of GW signals from cosmic strings. From this result, we derive new constraints on cosmic string parameters, which complement and improve existing limits from previous searches for a stochastic background of GWs from cosmic microwave background measurements and pulsar timing data. In particular, if the size of loops is given by the gravitational backreaction scale, we place upper limits on the string tension Gμ below 10(-8) in some regions of the cosmic string parameter space.
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Harron K, Wade A, Gilbert R, Muller-Pebody B, Goldstein H. Evaluating bias due to data linkage error in electronic healthcare records. BMC Med Res Methodol 2014; 14:36. [PMID: 24597489 PMCID: PMC4015706 DOI: 10.1186/1471-2288-14-36] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Accepted: 02/28/2014] [Indexed: 11/10/2022] Open
Abstract
Background Linkage of electronic healthcare records is becoming increasingly important for research purposes. However, linkage error due to mis-recorded or missing identifiers can lead to biased results. We evaluated the impact of linkage error on estimated infection rates using two different methods for classifying links: highest-weight (HW) classification using probabilistic match weights and prior-informed imputation (PII) using match probabilities. Methods A gold-standard dataset was created through deterministic linkage of unique identifiers in admission data from two hospitals and infection data recorded at the hospital laboratories (original data). Unique identifiers were then removed and data were re-linked by date of birth, sex and Soundex using two classification methods: i) HW classification - accepting the candidate record with the highest weight exceeding a threshold and ii) PII–imputing values from a match probability distribution. To evaluate methods for linking data with different error rates, non-random error and different match rates, we generated simulation data. Each set of simulated files was linked using both classification methods. Infection rates in the linked data were compared with those in the gold-standard data. Results In the original gold-standard data, 1496/20924 admissions linked to an infection. In the linked original data, PII provided least biased results: 1481 and 1457 infections (upper/lower thresholds) compared with 1316 and 1287 (HW upper/lower thresholds). In the simulated data, substantial bias (up to 112%) was introduced when linkage error varied by hospital. Bias was also greater when the match rate was low or the identifier error rate was high and in these cases, PII performed better than HW classification at reducing bias due to false-matches. Conclusions This study highlights the importance of evaluating the potential impact of linkage error on results. PII can help incorporate linkage uncertainty into analysis and reduce bias due to linkage error, without requiring identifiers.
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Thomas E, Wade A, Crawford G, Jenner B, Levinson N, Wilkinson J. Randomised clinical trial: relief of upper gastrointestinal symptoms by an acid pocket-targeting alginate-antacid (Gaviscon Double Action) - a double-blind, placebo-controlled, pilot study in gastro-oesophageal reflux disease. Aliment Pharmacol Ther 2014; 39:595-602. [PMID: 24471505 DOI: 10.1111/apt.12640] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Revised: 09/23/2013] [Accepted: 01/08/2014] [Indexed: 12/19/2022]
Abstract
BACKGROUND The alginate-antacid, Gaviscon Double Action (Gaviscon DA; Reckitt Benckiser, Slough, UK) suppresses reflux after meals by creating a gel-like barrier that caps and displaces the acid pocket distal to the oesophago-gastric junction. The effect of Gaviscon DA on reflux and dyspepsia symptoms has not yet been demonstrated with a modern trial design. AIM A pilot study to assess the efficacy and safety of Gaviscon DA compared with matched placebo for decreasing upper gastrointestinal symptoms in symptomatic gastro-oesophageal reflux disease (GERD) patients. METHODS A randomised, double-blind, parallel group study was performed in 110 patients with symptoms of GERD. Patients received Gaviscon DA or placebo tablets for 7 consecutive days. The primary endpoint compared the change in overall Reflux Disease Questionnaire (RDQ) symptom score (combined heartburn/regurgitation/dyspepsia). Secondary endpoints assessed individual dimensions, GERD dimension (heartburn and regurgitation) and overall treatment evaluation (OTE). RESULTS There was a greater decrease in overall RDQ symptom score in the Gaviscon DA group compared with the placebo group (Least Squares Mean difference -0.55; P = 0.0033), and for each of the dimensions independently. Patients in the Gaviscon DA group evaluated their overall treatment response higher than patients in the placebo group [mean (standard deviation) OTE 4.1 (2.44) vs. 1.9 (3.34); P = 0.0005]. No differences in the incidence of adverse events were observed between treatment groups. CONCLUSIONS Gaviscon DA decreases reflux and dyspeptic symptoms in GERD patients compared with matched placebo and has a favourable benefit-risk balance. Larger scale clinical investigations of medications targeting the acid pocket are warranted. (EudraCT, 2012-002188-84).
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Lally PJ, Price DL, Pauliah SS, Bainbridge A, Kurien J, Sivasamy N, Cowan FM, Balraj G, Ayer M, Satheesan K, Ceebi S, Wade A, Swamy R, Padinjattel S, Hutchon B, Vijayakumar M, Nair M, Padinharath K, Zhang H, Cady EB, Shankaran S, Thayyil S. Neonatal encephalopathic cerebral injury in South India assessed by perinatal magnetic resonance biomarkers and early childhood neurodevelopmental outcome. PLoS One 2014; 9:e87874. [PMID: 24505327 PMCID: PMC3914890 DOI: 10.1371/journal.pone.0087874] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 12/30/2013] [Indexed: 11/30/2022] Open
Abstract
UNLABELLED Although brain injury after neonatal encephalopathy has been characterised well in high-income countries, little is known about such injury in low- and middle-income countries. Such injury accounts for an estimated 1 million neonatal deaths per year. We used magnetic resonance (MR) biomarkers to characterise perinatal brain injury, and examined early childhood outcomes in South India. METHODS We recruited consecutive term or near term infants with evidence of perinatal asphyxia and a Thompson encephalopathy score ≥6 within 6 h of birth, over 6 months. We performed conventional MR imaging, diffusion tensor MR imaging and thalamic proton MR spectroscopy within 3 weeks of birth. We computed group-wise differences in white matter fractional anisotropy (FA) using tract based spatial statistics. We allocated Sarnat encephalopathy stage aged 3 days, and evaluated neurodevelopmental outcomes aged 3½ years using Bayley III. RESULTS Of the 54 neonates recruited, Sarnat staging was mild in 30 (56%); moderate in 15 (28%) and severe in 6 (11%), with no encephalopathy in 3 (6%). Six infants died. Of the 48 survivors, 44 had images available for analysis. In these infants, imaging indicated perinatal rather than established antenatal origins to injury. Abnormalities were frequently observed in white matter (n = 40, 91%) and cortex (n = 31, 70%) while only 12 (27%) had abnormal basal ganglia/thalami. Reduced white matter FA was associated with Sarnat stage, deep grey nuclear injury, and MR spectroscopy N-acetylaspartate/choline, but not early Thompson scores. Outcome data were obtained in 44 infants (81%) with 38 (79%) survivors examined aged 3½ years; of these, 16 (42%) had adverse neurodevelopmental outcomes. CONCLUSIONS No infants had evidence for established brain lesions, suggesting potentially treatable perinatal origins. White matter injury was more common than deep brain nuclei injury. Our results support the need for rigorous evaluation of the efficacy of rescue hypothermic neuroprotection in low- and middle-income countries.
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