Browsing by Author "Perera, Rafael"

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    ItemOpen Access
    Erratum to: Methods for evaluating medical tests and biomarkers.
    (Diagnostic and prognostic research, 2017-01) Gopalakrishna, Gowri; Langendam, Miranda; Scholten, Rob; Bossuyt, Patrick; Leeflang, Mariska; Noel-Storr, Anna; Thomas, James; Marshall, Iain; Wallace, Byron; Whiting, Penny; Davenport, Clare; Leeflang, Mariska; GopalaKrishna, Gowri; de Salis, Isabel; Mallett, Sue; Wolff, Robert; Whiting, Penny; Riley, Richard; Westwood, Marie; Kleinen, Jos; Collins, Gary; Reitsma, Hans; Moons, Karel; Zapf, Antonia; Hoyer, Annika; Kramer, Katharina; Kuss, Oliver; Ensor, J; Deeks, JJ; Martin, EC; Riley, RD; Rücker, Gerta; Steinhauser, Susanne; Schumacher, Martin; Riley, Richard; Ensor, Joie; Snell, Kym; Willis, Brian; Debray, Thomas; Moons, Karel; Deeks, Jon; Collins, Gary; di Ruffano, Lavinia Ferrante; Willis, Brian; Davenport, Clare; Mallett, Sue; Taylor-Phillips, Sian; Hyde, Chris; Deeks, Jon; Mallett, Sue; Taylor, Stuart A; Batnagar, Gauraang; STREAMLINE COLON Investigators; STREAMLINE LUNG Investigators; METRIC Investigators; Taylor-Phillips, Sian; Di Ruffano, Lavinia Ferrante; Seedat, Farah; Clarke, Aileen; Deeks, Jon; Byron, Sarah; Nixon, Frances; Albrow, Rebecca; Walker, Thomas; Deakin, Carla; Hyde, Chris; Zhelev, Zhivko; Hunt, Harriet; di Ruffano, Lavinia Ferrante; Yang, Yaling; Abel, Lucy; Buchanan, James; Fanshawe, Thomas; Shinkins, Bethany; Wynants, Laure; Verbakel, Jan; Van Huffel, Sabine; Timmerman, Dirk; Van Calster, Ben; Leeflang, Mariska; Zwinderman, Aeliko; Bossuyt, Patrick; Oke, Jason; O'Sullivan, Jack; Perera, Rafael; Nicholson, Brian; Bromley, Hannah L; Roberts, Tracy E; Francis, Adele; Petrie, Denniis; Mann, G Bruce; Malottki, Kinga; Smith, Holly; Deeks, Jon; Billingham, Lucinda; Sitch, Alice; Mallett, Sue; Deeks, Jon; Gerke, Oke; Holm-Vilstrup, Mie; Segtnan, Eivind Antonsen; Halekoh, Ulrich; Høilund-Carlsen, Poul Flemming; Francq, Bernard G; Deeks, Jon; Sitch, Alice; Dinnes, Jac; Parkes, Julie; Gregory, Walter; Hewison, Jenny; Altman, Doug; Rosenberg, William; Selby, Peter; Asselineau, Julien; Perez, Paul; Paye, Aïssatou; Bessede, Emilie; Proust-Lima, Cécile; Naaktgeboren, Christiana; de Groot, Joris; Rutjes, Anne; Bossuyt, Patrick; Reitsma, Johannes; Moons, Karel; Collins, Gary; Ogundimu, Emmanuel; Cook, Jonathan; Le Manach, Yannick; Altman, Doug; Wynants, Laure; Vergouwe, Yvonne; Van Huffel, Sabine; Timmerman, Dirk; Van Calster, Ben; Pajouheshnia, Romin; Groenwold, Rolf; Moons, Karen; Reitsma, Johannes; Peelen, Linda; Van Calster, Ben; Nieboer, Daan; Vergouwe, Yvonne; De Cock, Bavo; Pencina, Micael J; Steyerberg, Ewout W; Cooper, Jennifer; Taylor-Phillips, Sian; Parsons, Nick; Stinton, Chris; Smith, Steve; Dickens, Andy; Jordan, Rachel; Enocson, Alexandra; Fitzmaurice, David; Sitch, Alice; Adab, Peymane; Francq, Bernard G; Boachie, Charles; Vidmar, Gaj; Freeman, Karoline; Connock, Martin; Taylor-Phillips, Sian; Court, Rachel; Clarke, Aileen; de Groot, Joris; Naaktgeboren, Christiana; Reitsma, Hans; Moons, Carl; Harris, Jessica; Mumford, Andrew; Plummer, Zoe; Lee, Kurtis; Reeves, Barnaby; Rogers, Chris; Verheyden, Veerle; Angelini, Gianni D; Murphy, Gavin J; Huddy, Jeremy; Ni, Melody; Good, Katherine; Cooke, Graham; Bossuyt, Patrick; Hanna, George; Ma, Jie; Altman, Doug; Collins, Gary; Moons, KGM Carl; de Groot, Joris AH; Mallett, Sue; Altman, Doug G; Reitsma, Johannes B; Collins, Gary S; Moons, Karel GM; Altman, Douglas G; Reitsma, Johannes B; Collins, Gary S; Kamarudin, Adina Najwa; Kolamunnage-Dona, Ruwanthi; Cox, Trevor; Ni, Melody; Huddy, Jeremy; Borsci, Simone; Hanna, George; Pérez, Teresa; Pardo, M Carmen; Candela-Toha, Angel; Muriel, Alfonso; Zamora, Javier; Sanghera, Sabina; Mohiuddin, Syed; Martin, Richard; Donovan, Jenny; Coast, Joanna; Seo, Mikyung Kelly; Cairns, John; Mitchell, Elizabeth; Smith, Alison; Wright, Judy; Hall, Peter; Messenger, Michael; Calder, Nicola; Wickramasekera, Nyantara; Vinall-Collier, Karen; Lewington, Andrew; Pajouheshnia, Romin; Damen, Johanna; Groenwold, Rolf; Moons, Karel; Peelen, Linda; Messenger, Michael; Cairns, David; Smith, Alison; Hutchinson, Michelle; Wright, Judy; Hall, Peter; Calder, Nicola; Sturgeon, Cathie; Mitchel, Liz; Kift, Rebecca; Christakoudi, Sofia; Rungall, Manohursingh; Mobillo, Paula; Montero, Rosa; Tsui, Tjir-Li; Kon, Sui Phin; Tucker, Beatriz; Sacks, Steven; Farmer, Chris; Strom, Terry; Chowdhury, Paramit; Rebollo-Mesa, Irene; Hernandez-Fuentes, Maria; Damen, Johanna AAG; Debray, Thomas PA; Heus, Pauline; Hooft, Lotty; Moons, Karel GM; Pajouheshnia, Romin; Reitsma, Johannes B; Scholten, Rob JPM; Damen, Johanna AAG; Hooft, Lotty; Schuit, Ewoud; Debray, Thomas PA; Collins, Gary S; Tzoulaki, Ioanna; Lassale, Camille M; Siontis, George CM; Chiocchia, Virginia; Roberts, Corran; Schlüssel, Michael Maia; Gerry, Stephen; Black, James A; Heus, Pauline; van der Schouw, Yvonne T; Peelen, Linda M; Moons, Karel GM; Damen, Johanna AAG; Debray, Thomas PA; Heus, Pauline; Hooft, Lotty; Moons, Karel GM; Pajouheshnia, Romin; Reitsma, Johannes B; Scholten, Rob JPM; Ma, Jie; Altman, Doug; Collins, Gary; Spence, Graeme; McCartney, David; van den Bruel, Ann; Lasserson, Daniel; Hayward, Gail; Vach, Werner; de Jong, Antoinette; Burggraaff, Coreline; Hoekstra, Otto; Zijlstra, Josée; de Vet, Henrica; Hunt, Harriet; Hyde, Chris; Graziadio, Sara; Allen, Joy; Johnston, Louise; O'Leary, Rachel; Power, Michael; Allen, Joy; Graziadio, Sara; Johnson, Louise; O'Leary, Rachel; Power, Michael; Waters, Ray; Simpson, John; Johnston, Louise; Allen, Joy; Graziadio, Sara; O'Leary, Rachel; Waters, Ray; Power, Michael; Mallett, Sue; Fanshawe, Thomas R; Phillips, Peter; Plumb, Andrew; Helbren, Emma; Halligan, Steve; Taylor, Stuart A; Gale, Alastair; Mallett, Sue; Sekula, Peggy; Altman, Douglas G; Sauerbrei, Willi; Mallett, Sue; Fanshawe, Thomas R; Forman, Julia R; Dutton, Susan J; Takwoingi, Yemisi; Hensor, Elizabeth M; Nichols, Thomas E; Shinkins, Bethany; Yang, Yaling; Abel, Lucy; Di Ruffano, Lavinia Ferrante; Fanshawe, Thomas; Kempf, Emmanuelle; Porcher, Raphael; de Beyer, Jennifer; Moons, Karel; Altman, Douglas; Reitsma, Hans; Hopewell, Sally; Sauerbrei, Willi; Collins, Gary; Dennis, John; Shields, Beverley; Jones, Angus; Henley, William; Pearson, Ewan; Hattersley, Andrew; MASTERMIND consortium; Heus, Pauline; Damen, Johanna AAG; Pajouheshnia, Romin; Scholten, Rob JPM; Reitsma, Johannes B; Collins, Gary S; Altman, Douglas G; Moons, Karel GM; Hooft, Lotty; Shields, Beverley; Dennis, John; Jones, Angus; Henley, William; Pearson, Ewan; Hattersley, Andrew; MASTERMIND consortium; Scheibler, Fueloep; Rummer, Anne; Sturtz, Sibylle; Großelfinger, Robert; Banister, Katie; Ramsay, Craig; Azuara-Blanco, Augusto; Cook, Jonathan; Boachie, Charles; Burr, Jennifer; Kumarasamy, Manjula; Bourne, Rupert; Uchegbu, Ijeoma; Borsci, Simone; Murphy, Jennifer; Hanna, George; Uchegbu, Ijeoma; Carter, Alex; Murphy, Jen; Ni, Melody; Marti, Joachim; Eatock, Julie; Uchegbu, Ijeoma; Robotham, Julie; Dudareva, Maria; Gilchrist, Mark; Holmes, Alison; Uchegbu, Ijeoma; Borsci, Simone; Monaghan, Phillip; Lord, Sarah; StJohn, Andrew; Sandberg, Sverre; Cobbaert, Christa; Lennartz, Lieselotte; Verhagen-Kamerbeek, Wilma; Ebert, Christoph; Bossuyt, Patrick; Horvath, Andrea; Test Evaluation Working Group of the European Federation of Clinical Chemistry and Laboratory Medicine; Jenniskens, Kevin; Naaktgeboren, Christiana; Reitsma, Johannes; Moons, Karel; de Groot, Joris; Hyde, Chris; Peters, Jaime; Grigore, Bogdan; Peters, Jaime; Hyde, Chris; Hyde, Chris; Ukoumunne, Obi; Peters, Jaime; Zhelev, Zhivko; Levis, Brooke; Benedetti, Andrea; Levis, Alexander W; Ioannidis, John PA; Shrier, Ian; Cuijpers, Pim; Gilbody, Simon; Kloda, Lorie A; McMillan, Dean; Patten, Scott B; Steele, Russell J; Ziegelstein, Roy C; Bombardier, Charles H; Osório, Flavia de Lima; Fann, Jesse R; Gjerdingen, Dwenda; Lamers, Femke; Lotrakul, Manote; Loureiro, Sonia R; Löwe, Bernd; Shaaban, Juwita; Stafford, Lesley; van Weert, Henk CPM; Whooley, Mary A; Williams, Linda S; Wittkampf, Karin A; Yeung, Albert S; Thombs, Brett D; Peters, Jaime; Cooper, Chris; Buchanan, James; Nieto, Tom; Smith, Claire; Tucker, Olga; Dretzke, Janine; Beggs, Andrew; Rai, Nirmala; Davenport, Clare; Bayliss, Sue; Stevens, Simon; Snell, Kym; Mallet, Sue; Deeks, Jon; Sundar, Sudha; Hall, Emma; Porta, Nuria; Estelles, David Lorente; de Bono, Johann; CTC-STOP protocol development group
    [This corrects the article DOI: 10.1186/s41512-016-0001-y.].
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    ItemOpen Access
    Self-monitoring of oral anticoagulation: systematic review and meta-analysis of individual patient data.
    (Lancet (London, England), 2012-01) Heneghan, Carl; Ward, Alison; Perera, Rafael; Self-Monitoring Trialist Collaboration; Bankhead, Clare; Fuller, Alice; Stevens, Richard; Bradford, Kairen; Tyndel, Sally; Alonso-Coello, Pablo; Ansell, Jack; Beyth, Rebecca; Bernardo, Artur; Christensen, Thomas Decker; Cromheecke, ME; Edson, Robert G; Fitzmaurice, David; Gadisseur, Alain PA; Garcia-Alamino, Josep M; Gardiner, Chris; Hasenkam, J Michael; Jacobson, Alan; Kaatz, Scott; Kamali, Farhad; Khan, Tayyaba Irfan; Knight, Eve; Körtke, Heinrich; Levi, Marcel; Matchar, David; Menéndez-Jándula, Bárbara; Rakovac, Ivo; Schaefer, Christian; Siebenhofer, Andrea; Souto, Juan Carlos; Sunderji, Rubina; Gin, Kenneth; Shalansky, Karen; Völler, Heinz; Wagner, Otto; Zittermann, Armin

    Background

    Uptake of self-testing and self-management of oral anticoagulation [corrected] has remained inconsistent, despite good evidence of their effectiveness. To clarify the value of self-monitoring of oral anticoagulation, we did a meta-analysis of individual patient data addressing several important gaps in the evidence, including an estimate of the effect on time to death, first major haemorrhage, and thromboembolism.

    Methods

    We searched Ovid versions of Embase (1980-2009) and Medline (1966-2009), limiting searches to randomised trials with a maximally sensitive strategy. We approached all authors of included trials and requested individual patient data: primary outcomes were time to death, first major haemorrhage, and first thromboembolic event. We did prespecified subgroup analyses according to age, type of control-group care (anticoagulation-clinic care vs primary care), self-testing alone versus self-management, and sex. We analysed patients with mechanical heart valves or atrial fibrillation separately. We used a random-effect model method to calculate pooled hazard ratios and did tests for interaction and heterogeneity, and calculated a time-specific number needed to treat.

    Findings

    Of 1357 abstracts, we included 11 trials with data for 6417 participants and 12,800 person-years of follow-up. We reported a significant reduction in thromboembolic events in the self-monitoring group (hazard ratio 0·51; 95% CI 0·31-0·85) but not for major haemorrhagic events (0·88, 0·74-1·06) or death (0·82, 0·62-1·09). Participants younger than 55 years showed a striking reduction in thrombotic events (hazard ratio 0·33, 95% CI 0·17-0·66), as did participants with mechanical heart valve (0·52, 0·35-0·77). Analysis of major outcomes in the very elderly (age ≥85 years, n=99) showed no significant adverse effects of the intervention for all outcomes.

    Interpretation

    Our analysis showed that self-monitoring and self-management of oral coagulation is a safe option for suitable patients of all ages. Patients should also be offered the option to self-manage their disease with suitable health-care support as back-up.

    Funding

    UK National Institute for Health Research (NIHR) Technology Assessment Programme, UK NIHR National School for Primary Care Research.