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1. Single-dose administration and the influence of the timing of the booster dose on immunogenicity and efficacy of ChAdOx1 nCoV-19 (AZD1222) vaccine: a pooled analysis of four randomised trials

Author: Aban, Marites, Abeyskera, Kushala W.M., Aboagye, Jeremy, Adam, Matthew, Adams, Kirsty, Adamson, James P., Adewatan, Gbadebo, Adlou, Syed, Ahmed, Khatija, Akhalwaya, Yasmeen, Akhalwaya, Saajida, Alcock, Andrew, Ali, Aabidah, Allen, Elizabeth R., Allen, Lauren, Alvernaz, Felipe B., Amorim, Fabio Santos, Andrade, Claudia Sala, Andritsou, Foteini, Anslow, Rachel, Arbe-Barnes, Edward H., Ariaans, Mark P., Arns, Beatriz, Arruda, Laiana, Assad, Luiza, Azi, Paula De Almeida, Azi, Lorena De Almeida, Babbage, Gavin, Bailey, Catherine, Baker, Kenneth F., Baker, Megan, Baker, Natalie, Baker, Philip, Baleanu, Ioana, Bandeira, Danieli, Bara, Anna, Barbosa, Marcella A.S., Barker, Debbie, Barlow, Gavin D., Barnes, Eleanor, Barr, Andrew S., Barrett, Jordan R., Barrett, Jessica, Barrett, Kelly, Bates, Louise, Batten, Alexander, Beadon, Kirsten, Beales, Emily, Beckley, Rebecca, Belij-Rammerstorfer, Sandra, Bell, Jonathan, Bellamy, Duncan, Belton, Sue, Berg, Adam, Bermejo, Laura, Berrie, Eleanor, Berry, Lisa, Berzenyi, Daniella, Beveridge, Amy, Bewley, Kevin R., Bharaj, Inderjeet, Bhikha, Sutika, Bhorat, Asad E., Bhorat, Zaheda E., Bijker, Else Margreet, Birch, Sarah, Birch, Gurpreet, Birchall, Kathryn, Bird, Adam, Bird, Olivia, Bisnauthsing, Karen, Bittaye, Mustapha, Blackwell, Luke, Blacow, Rachel, Bletchly, Heather, Blundell, Caitlin L., Blundell, Susannah R., Bodalia, Pritesh, Bolam, Emma, Boland, Elena, Bormans, Daan, Borthwick, Nicola, Bowring, Francesca, Boyd, Amy, Bradley, Penny, Brenner, Tanja, Bridges-Webb, Alice, Brown, Phillip, Brown, Claire, Brown-O'Sullivan, Charlie, Bruce, Scott, Brunt, Emily, Budd, William, Bulbulia, Yusuf A., Bull, Melanie, Burbage, Jamie, Burn, Aileen, Buttigieg, Karen R., Byard, Nicholas, Cabrera Puig, Ingrid, Calvert, Anna, Camara, Susana, Cao, Michelangelo, Cappuccini, Federica, Cardona, Rita, Cardoso, João R., Carr, Melanie, Carroll, Miles W., Carson-Stevens, Andrew, Carvalho, Yasmin de M., Casey, Helen R., Cashen, Paul, Castro, Thais R.Y., Castro, Lucia Carratala, Cathie, Katrina, Cavey, Ana, Cerbino-Neto, José, Cezar, Luiz Fernando F., Chadwick, Jim, Chanice, Chanice, Chapman, David, Charlton, Sue, Cheliotis, Katerina S., Chelysheva, Irina, Chester, Oliver, Chiplin, Emily, Chita, Sunder, Cho, Jee-Sun, Cifuentes, Liliana, Clark, Elizabeth, Clark, Matthew, Colin-Jones, Rachel, Collins, Sarah L.K., Colton, Hayley, Conlon, Christopher P., Connarty, Sean, Coombes, Naomi, Cooper, Cushla, Cooper, Rachel, Cornelissen, Lynne, Corrah, Tumena, Cosgrove, Catherine A., Costa, Fernanda Barroso, Cox, Tony, Crocker, Wendy E.M., Crosbie, Sarah, Cullen, Dan, Cunha, Debora R.M.F., Cunningham, Christina J., Cuthbertson, Fiona C., da Costa, Daniel Marinho, Da Guarda, Suzete N. Farias, da Silva, Larissa P., da Silva Moraes, Antonio Carlos, Damratoski, Brad E., Danos, Zsofia, Dantas, Maria T.D.C., Datoo, Mehreen S., Datta, Chandrabali, Davids, Malika, Davies, Sarah L., Davies, Kelly, Davies, Hannah, Davies, Sophie, Davies, Judith, Davis, Elizabeth J., Davis, John, de Carvalho, José A.M., De Jager, Jeanne, de Jesus Jnr, Sergio, De Oliveira Kalid, Lis Moreno, Dearlove, David, Demissie, Tesfaye, Desai, Amisha, Di Marco, Stefania, Di Maso, Claudio, Dinesh, Tanya, Docksey, Claire, Dong, Tao, Donnellan, Francesca R., Dos Santos, Tannyth Gomes, Dos Santos, Thainá G., Dos Santos, Erika Pachecho, Douglas, Naomi, Downing, Charlotte, Drake, Jonathan, Drake-Brockman, Rachael, Drury, Ruth, Du Plessis, Joan, Dunachie, Susanna J., Duncan, Andrew, Easom, Nicholas J.W., Edwards, Mandy, Edwards, Nick J., Edwards, Frances, El Muhanna, Omar M., Elias, Sean C., Ellison-Handley, Branwen, Elmore, Michael J., English, Marcus Rex, Esmail, Alisgair, Essack, Yakub Moosa, Farooq, Mutjaba, Fedosyuk, Sofiya, Felle, Sally, Ferguson, Susie, Ferreira Da Silva, Carla, Field, Samantha, Fisher, Richard, Fletcher, James, Fofie, Hazel, Fok, Henry, Ford, Karen J., Fothergill, Ross, Fowler, Jamie, Fraiman, Pedro H.A., Francis, Emma, Franco, Marilia M., Frater, John, Freire, Marilúcia S.M., Fry, Samantha H., Fudge, Sabrina, Furlan Filho, Renato, Furze, Julie, Fuskova, Michelle, Galian-Rubio, Pablo, Garlant, Harriet, Gavrila, Madita, Gibbons, Karyna A., Gilbride, Ciaran, Gill, Hardeep, Godwin, Kerry, Gokani, Karishma, Gonçalves, Maria Luisa Freire, Gonzalez, Isabela G.S., Goodall, Jack, Goodwin, Jayne, Goondiwala, Amina, Gordon-Quayle, Katherine, Gorini, Giacomo, Goyanna, Alvaro, Grab, Janet, Gracie, Lara, Green, Justin, Greenwood, Nicola, Greffrath, Johann, Groenewald, Marisa M., Gunawardene, Anishka, Gupta, Gaurav, Hackett, Mark, Hallis, Bassam, Hamaluba, Mainga, Hamilton, Elizabeth, Hamlyn, Joseph, Hammersley, Daniel, Hanrath, Aidan T., Hanumunthadu, Brama, Harris, Stephanie A., Harris, Clair, Harrison, Thomas D., Harrison, Daisy, Harris-Wright, Tara A., Hart, Thomas C., Hartnell, Birgit, Haughney, John, Hawkins, Sophia, Hayano, Laís Y.M., Head, Ian, Heath, Paul T., Henry, John Aaron, Hermosin Herrera, Macarena, Hettle, David B., Higa, Cristhiane, Hill, Jennifer, Hodges, Gina, Hodgson, Susanne, Horne, Elizea, Hou, Mimi M., Houlihan, Catherine F., Howe, Elizabeth, Howell, Nicola, Humphreys, Jonathan, Humphries, Holly E., Hurley, Katrina, Huson, Claire, Hyams, Catherine, Hyder-Wright, Angela, Ikram, Sabina, Ishwarbhai, Alka, Iveson, Poppy, Iyer, Vidyashankara, Jackson, Frederic, Jackson, Susan, Jaumdally, Shameem, Jeffers, Helen, Jesudason, Natasha, Jones, Carina, Jones, Christopher, Jones, Kathryn, Jones, Elizabeth, Jorge, Marianna Rocha, Joshi, Amar, Júnior, Eduardo A.M.S., Kailath, Reshma, Kana, Faeeza, Kar, Arnab, Karampatsas, Konstantinos, Kasanyinga, Mwila, Kay, Linda, Keen, Jade, Kellett Wright, Johanna, Kelly, Elizabeth J., Kelly, Debbie, Kelly, Dearbhla M., Kelly, Sarah, Kerr, David, Khan, Liaquat, Khozoee, Baktash, Khurana, Ankush, Kidd, Sarah, Killen, Annabel, Kinch, Jasmin, Kinch, Patrick, King, Lloyd D.W., King, Thomas B., Kingham, Lucy, Klenerman, Paul, Kluczna, Diana M., Knapper, Francesca, Knight, Julian C., Knott, Daniel, Koleva, Stanislava, Lages, Pedro M., Lang, Matilda, Lang, Gail, Larkworthy, Colin W., Larwood, Jessica P.J., Law, Rebecca, Lawrie, Alison M., Lazarus, Erica M., Leach, Amanda, Lees, Emily A., Lelliott, Alice, Lemm, Nana-Marie, Lessa, Alvaro Edson Ramos, Leung, Stephanie, Li, Yuanyuan, Lias, Amelia M., Liatsikos, Konstantinos, Linder, Aline, Lipworth, Samuel, Liu, Shuchang, Liu, Xinxue, Lloyd, Adam, Lloyd, Stephanie, Loew, Lisa, Lopez Ramon, Raquel, Lora, Leandro Bonecker, Luz, Kleber Giovanni, MacDonald, Jonathan C., MacGregor, Gordon, Madhavan, Meera, Mainwaring, David O., Makambwa, Edson, Makinson, Rebecca, Malahleha, Mookho, Malamatsho, Ross, Mallett, Garry, Manning, Nicola, Mansatta, Kushal, Maoko, Takalani, Marinou, Spyridoula, Marlow, Emma, Marques, Gabriela N., Marriott, Paula, Marshall, Richard P., Marshall, Julia L., Masenya, Masebole, Masilela, Mduduzi, Masters, Shauna K., Mathew, Moncy, Matlebjane, Hosea, Matshidiso, Kedidimetse, Mazur, Olga, Mazzella, Andrea, McCaughan, Hugh, McEwan, Joanne, McGlashan, Joanna, McInroy, Lorna, McRobert, Nicky, McSwiggan, Steve, Megson, Clare, Mehdipour, Savviz, Meijs, Wilma, Mendonça, Renata N.Õ., Mentzer, Alexander J., Mesquita, Ana Carolina F., Miralhes, Patricia, Mirtorabi, Neginsadat, Mitton, Celia, Mnyakeni, Sibusiso, Moghaddas, Fiona, Molapo, Kgaogelo, Moloi, Mapule, Moore, Maria, Moran, Marni, Morey, Ella, Morgans, Róisín, Morris, Susan J., Morris, Sheila, Morrison, Hazel, Morselli, Franca, Morshead, Gertraud, Morter, Richard, Mottay, Lynelle, Moultrie, Andrew, Moyo, Nathifa, Mpelembue, Mushiya, Msomi, Sibekezelo, Mugodi, Yvonne, Mukhopadhyay, Ekta, Muller, Jilly, Munro, Alasdair, Murphy, Sarah, Mweu, Philomena, Myerscough, Christopher, Naik, Gurudutt, Naker, Kush, Nastouli, Eleni, Ndlovu, Bongani, Nikolaou, Elissavet, Njenga, Cecilia, Noal, Helena C., Noé, Andrés, Novaes, Gabrielle, Nugent, Fay L., Nunes, Géssika Lanzillo A., O'Brien, Katie, O'Connor, Daniel, Oelofse, Suzette, Oguti, Blanche, Olchawski, Victoria, Oldfield, Neil J., Oliveira, Marianne G., Oliveira, Catarina, Oliveira, Isabelle Silva Queiroz, Oommen-Jose, Aylin, Oosthuizen, Angela, O'Reilly, Paula, O'Reilly, Peter J., Osborne, Piper, Owen, David R.J., Owen, Lydia, Owens, Daniel, Owino, Nelly, Pacurar, Mihaela, Paiva, Brenda V.B., Palhares, Edna M.F., Palmer, Susan, Parracho, Helena M. R.T., Parsons, Karen, Patel, Dipak, Patel, Bhumika, Patel, Faeezah, Patrick-Smith, Maia, Payne, Ruth O., Peng, Yanchun, Penn, Elizabeth J., Pennington, Anna, Peralta Alvarez, Marco Polo, Pereira Stuchi, Bruno Pereira, Perez, Ana Luiza, Perinpanathan, Tanaraj, Perring, James, Perumal, Rubeshan, Petkar, Sahir Yusuf, Philip, Tricia, Phillips, Jennifer, Phohu, Mary Kgomotso, Pickup, Lorinda, Pieterse, Sonja, Pinheiro, Jessica Morgana, Piper, Jo, Pipini, Dimitra, Plank, Mary, Plant, Sinéad, Pollard, Samuel, Pooley, Jennifer, Pooran, Anil, Poulton, Ian, Powers, Claire, Presa, Fernando B., Price, David A., Price, Vivien, Primeira, Marcelo R., Proud, Pamela C., Provstgaard-Morys, Samuel, Pueschel, Sophie, Pulido, David, Quaid, Sheena, Rabara, Ria, Radia, Kajal, Rajapaska, Durga, Rajeswaran, Thurkka, Ramos, Leonardo, Ramos, Alberto San Francisco, Ramos Lopez, Fernando, Rampling, Tommy, Rand, Jade, Ratcliffe, Helen, Rawlinson, Tom, Rea, David, Rees, Byron, Resuello-Dauti, Mila, Reyes Pabon, Emilia, Rhead, Sarah, Riaz, Tawassal, Ricamara, Marivic, Richards, Alexander, Richter, Alex, Ritchie, Neil, Ritchie, Adam J., Robbins, Alexander J., Roberts, Hannah, Robinson, Ryan E., Roche, Sophie, Rollier, Christine, Rose, Louisa, Ross Russell, Amy L., Rossouw, Lindie, Royal, Simon, Rudiansyah, Indra, Ryalls, Kim, Sabine, Charlotte, Saich, Stephen, Sale, Jessica C., Salman, Ahmed M., Salvador, Natalia, Salvador, Stephannie, Sampaio, Milla Dias, Samson, Annette D., Sanchez-Gonzalez, Amada, Sanders, Helen, Sanders, Katherine, Santos, Erika, Santos Guerra, Mayara F.S., Satti, Iman, Saunders, Jack E., Saunders, Caroline, Sayed, Aakifah Bibi Arif, Schim van der Loeff, Ina, Schmid, Annina B., Schofield, Ella, Screaton, Gavin R., Seddiqi, Samiullah, Segireddy, Rameswara R., Senger, Roberta, Serrano, Sonia, Shaik, Imam, Sharpe, Hannah R., Sharrocks, Katherine, Shaw, Robert, Shea, Adam, Sheehan, Emma, Shepherd, Amy, Shiham, Farah, Silk, Sarah E., Silva-Reyes, Laura, Silveira, Lidiana B. T.D., Silveira, Mariana B.V., Singh, Nisha, Sinha, Jaisi, Skelly, Donal T., Smith, Daniel C., Smith, Nick, Smith, Holly E., Smith, David J., Smith, Catherine C., Soares, Airanuédida S., Solórzano, Carla, Sorio, Guilherme L., Sorley, Kim, Sosa-Rodriguez, Tiffany, Souza, Cinthia M.C.D.L., Souza, Bruno S.D.F., Souza, Alessandra R., Souza Lopez, Thamyres, Sowole, Luciana, Spencer, Alexandra J., Spoors, Louise, Stafford, Lizzie, Stamford, Imogen, Stein, Ricardo, Stockdale, Lisa, Stockwell, Lisa V., Strickland, Louise H., Stuart, Arabella, Sturdy, Ann, Sutton, Natalina, Szigeti, Anna, Tahiri-Alaoui, Abdessamad, Tanner, Rachel, Taoushanis, Carol, Tarr, Alexander W., Tarrant, Richard, Taylor, Keja, Taylor, Ursula, Taylor, Iona Jennifer, Taylor, Justin, te Water Naude, Rebecca, Templeton, Kate, Themistocleous, Yrene, Themistocleous, Andreas, Thomas, Merin, Thomas, Kelly, Thomas, Tonia M., Thombrayil, Asha, Thompson, Julia, Thompson, Fawziyah, Thompson, Ameeka, Thompson, Amber, Thompson, Kevin, Thornton-Jones, Viv, Thotusi, Larissa H.S., Tighe, Patrick J., Tinoco, Lygia Accioly, Tiongson, Gerlynn Ferreras, Tladinyane, Bonolo, Tomasicchio, Michele, Tomic, Adriana, Tonks, Susan, Towner, James, Tran, Nguyen, Tree, Julia A., Trillana, Gerry, Trinham, Charlotte, Trivett, Rose, Truby, Adam, Tsheko, Betty Lebogang, Tubb, Philippa, Turabi, Aadil, Turner, Richard, Turner, Cheryl, Turner, Nicola, Tyagi, Bhavya, Ulaszewska, Marta, Underwood, Benjamin R., van Eck, Samual, Varughese, Rachel, Verbart, Dennis, Verheul, Marije K., Vichos, Iason, Vieira, Taiane A., Walker, Gemma, Walker, Laura, Wand, Matthew E., Wardell, Theresa, Warimwe, George M., Warren, Sarah C., Watkins, Bridget, Watson, Marion E.E., Watson, Ekaterina, Webb, Stewart, Webster, Angela, Welch, Jessica, Wellbelove, Zoe, Wells, Jeanette H., West, Alison J., White, Beth, White, Caroline, White, Rachel, Williams, Paul, Williams, Rachel L., Willingham, Silvia, Winslow, Rebecca, Woods, Danielle, Woodyer, Mark, Worth, Andrew T., Wright, Danny, Wroblewska, Marzena, Yao, Andy, Yim, Yee Ting Nicole, Zambrano, Marina Bauer, Zimmer, Rafael Leal, Zizi, Dalila, Zuidewind, Peter, Voysey, Merryn, Costa Clemens, Sue Ann, Madhi, Shabir A, Weckx, Lily Y, Folegatti, Pedro M, Aley, Parvinder K, Angus, Brian, Baillie, Vicky L, Barnabas, Shaun L, Bhorat, Qasim E, Bibi, Sagida, Briner, Carmen, Cicconi, Paola, Clutterbuck, Elizabeth A, Collins, Andrea M, Cutland, Clare L, Darton, Thomas C, Dheda, Keertan, Dold, Christina, Duncan, Christopher J A, Emary, Katherine R W, Ewer, Katie J, Flaxman, Amy, Fairlie, Lee, Faust, Saul N, Feng, Shuo, Ferreira, Daniela M, Finn, Adam, Galiza, Eva, Goodman, Anna L, Green, Catherine M, Green, Christopher A, Greenland, Melanie, Hill, Catherine, Hill, Helen C, Hirsch, Ian, Izu, Alane, Jenkin, Daniel, Joe, Carina C D, Kerridge, Simon, Koen, Anthonet, Kwatra, Gaurav, Lazarus, Rajeka, Libri, Vincenzo, Lillie, Patrick J, Marchevsky, Natalie G, Marshall, Richard P, Mendes, Ana V A, Milan, Eveline P, Minassian, Angela M, McGregor, Alastair, Mujadidi, Yama F, Nana, Anusha, Padayachee, Sherman D, Phillips, Daniel J, Pittella, Ana, Plested, Emma, Pollock, Katrina M, Ramasamy, Maheshi N, Ritchie, Adam J, Robinson, Hannah, Schwarzbold, Alexandre V, Smith, Andrew, Song, Rinn, Snape, Matthew D, Sprinz, Eduardo, Sutherland, Rebecca K, Thomson, Emma C, Török, M Estée, Toshner, Mark, Turner, David P J, Vekemans, Johan, Villafana, Tonya L, White, Thomas, Williams, Christopher J, Douglas, Alexander D, Hill, Adrian V S, Lambe, Teresa, Gilbert, Sarah C, and Pollard, Andrew J
Published: 2021
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2. Safety and efficacy of the ChAdOx1 nCoV-19 vaccine (AZD1222) against SARS-CoV-2: an interim analysis of four randomised controlled trials in Brazil, South Africa, and the UK

Author: Aban, Marites, Abayomi, Fatola, Abeyskera, Kushala, Aboagye, Jeremy, Adam, Matthew, Adams, Kirsty, Adamson, James, Adelaja, Yemi A., Adewetan, Gbadebo, Adlou, Syed, Ahmed, Khatija, Akhalwaya, Yasmeen, Akhalwaya, Saajida, Alcock, Andrew, Ali, Aabidah, Allen, Elizabeth R., Allen, Lauren, Almeida, Thamires C. D. S. C, Alves, Mariana P.S., Amorim, Fabio, Andritsou, Foteini, Anslow, Rachel, Appleby, Matthew, Arbe-Barnes, Edward H., Ariaans, Mark P., Arns, Beatriz, Arruda, Laiana, Azi, Paula, Azi, Lorena, Babbage, Gavin, Bailey, Catherine, Baker, Kenneth F., Baker, Megan, Baker, Natalie, Baker, Philip, Baldwin, Lisa, Baleanu, Ioana, Bandeira, Danieli, Bara, Anna, Barbosa, Marcella A.S., Barker, Debbie, Barlow, Gavin D., Barnes, Eleanor, Barr, Andrew S., Barrett, Jordan R., Barrett, Jessica, Bates, Louise, Batten, Alexander, Beadon, Kirsten, Beales, Emily, Beckley, Rebecca, Belij-Rammerstorfer, Sandra, Bell, Jonathan, Bellamy, Duncan, Bellei, Nancy, Belton, Sue, Berg, Adam, Bermejo, Laura, Berrie, Eleanor, Berry, Lisa, Berzenyi, Daniella, Beveridge, Amy, Bewley, Kevin R., Bexhell, Helen, Bhikha, Sutika, Bhorat, Asad E., Bhorat, Zaheda E., Bijker, Else, Birch, Geeta, Birch, Sarah, Bird, Adam, Bird, Olivia, Bisnauthsing, Karen, Bittaye, Mustapha, Blackstone, Katherine, Blackwell, Luke, Bletchly, Heather, Blundell, Caitlin L., Blundell, Susannah R., Bodalia, Pritesh, Boettger, Bruno C., Bolam, Emma, Boland, Elena, Bormans, Daan, Borthwick, Nicola, Bowring, Francesca, Boyd, Amy, Bradley, Penny, Brenner, Tanja, Brown, Phillip, Brown, Claire, Brown-O'Sullivan, Charlie, Bruce, Scott, Brunt, Emily, Buchan, Ruaridh, Budd, William, Bulbulia, Yusuf A., Bull, Melanie, Burbage, Jamie, Burhan, Hassan, Burn, Aileen, Buttigieg, Karen R., Byard, Nicholas, Cabera Puig, Ingrid, Calderon, Gloria, Calvert, Anna, Camara, Susana, Cao, Michelangelo, Cappuccini, Federica, Cardoso, João R., Carr, Melanie, Carroll, Miles W., Carson-Stevens, Andrew, Carvalho, Yasmin de M., Carvalho, José A.M., Casey, Helen R., Cashen, Paul, Castro, Thais, Castro, Lucia Carratala, Cathie, Katrina, Cavey, Ana, Cerbino-Neto, José, Chadwick, Jim, Chapman, David, Charlton, Sue, Chelysheva, Irina, Chester, Oliver, Chita, Sunder, Cho, Jee-Sun, Cifuentes, Liliana, Clark, Elizabeth, Clark, Matthew, Clarke, Andrea, Clutterbuck, Elizabeth A., Collins, Sarah L.K., Conlon, Christopher P., Connarty, Sean, Coombes, Naomi, Cooper, Cushla, Cooper, Rachel, Cornelissen, Lynne, Corrah, Tumena, Cosgrove, Catherine, Cox, Tony, Crocker, Wendy E.M., Crosbie, Sarah, Cullen, Lorraine, Cullen, Dan, Cunha, Debora R.M.F., Cunningham, Christina, Cuthbertson, Fiona C., Da Guarda, Suzete N. Farias, da Silva, Larissa P., Damratoski, Brad E., Danos, Zsofia, Dantas, Maria T.D.C., Darroch, Paula, Datoo, Mehreen S., Datta, Chandrabali, Davids, Malika, Davies, Sarah L., Davies, Hannah, Davis, Elizabeth, Davis, Judith, Davis, John, De Nobrega, Maristela M.D., De Oliveira Kalid, Lis Moreno, Dearlove, David, Demissie, Tesfaye, Desai, Amisha, Di Marco, Stefania, Di Maso, Claudio, Dinelli, Maria I.S., Dinesh, Tanya, Docksey, Claire, Dold, Christina, Dong, Tao, Donnellan, Francesca R., Dos Santos, Tannyth, dos Santos, Thainá G., Dos Santos, Erika Pachecho, Douglas, Naomi, Downing, Charlotte, Drake, Jonathan, Drake-Brockman, Rachael, Driver, Kimberley, Drury, Ruth, Dunachie, Susanna J., Durham, Benjamin S., Dutra, Lidiana, Easom, Nicholas J.W., van Eck, Samual, Edwards, Mandy, Edwards, Nick J., El Muhanna, Omar M., Elias, Sean C., Elmore, Mike, English, Marcus, Esmail, Alisgair, Essack, Yakub Moosa, Farmer, Eoghan, Farooq, Mutjaba, Farrar, Madi, Farrugia, Leonard, Faulkner, Beverley, Fedosyuk, Sofiya, Felle, Sally, Feng, Shuo, Ferreira Da Silva, Carla, Field, Samantha, Fisher, Richard, Flaxman, Amy, Fletcher, James, Fofie, Hazel, Fok, Henry, Ford, Karen J., Fowler, Jamie, Fraiman, Pedro H.A., Francis, Emma, Franco, Marilia M., Frater, John, Freire, Marilúcia S.M., Fry, Samantha H., Fudge, Sabrina, Furze, Julie, Fuskova, Michelle, Galian-Rubio, Pablo, Galiza, Eva, Garlant, Harriet, Gavrila, Madita, Geddes, Ailsa, Gibbons, Karyna A., Gilbride, Ciaran, Gill, Hardeep, Glynn, Sharon, Godwin, Kerry, Gokani, Karishma, Goldoni, Ursula Carvalho, Goncalves, Maria, Gonzalez, Isabela G.S., Goodwin, Jayne, Goondiwala, Amina, Gordon-Quayle, Katherine, Gorini, Giacomo, Grab, Janet, Gracie, Lara, Greenland, Melanie, Greenwood, Nicola, Greffrath, Johann, Groenewald, Marisa M., Grossi, Leonardo, Gupta, Gaurav, Hackett, Mark, Hallis, Bassam, Hamaluba, Mainga, Hamilton, Elizabeth, Hamlyn, Joseph, Hammersley, Daniel, Hanrath, Aidan T., Hanumunthadu, Brama, Harris, Stephanie A., Harris, Clair, Harris, Tara, Harrison, Thomas D., Harrison, Daisy, Hart, Thomas C., Hartnell, Birgit, Hassan, Shadin, Haughney, John, Hawkins, Sophia, Hay, Jodie, Head, Ian, Henry, John, Hermosin Herrera, Macarena, Hettle, David B., Hill, Jennifer, Hodges, Gina, Horne, Elizea, Hou, Mimi M., Houlihan, Catherine, Howe, Elizabeth, Howell, Nicola, Humphreys, Jonathan, Humphries, Holly E., Hurley, Katrina, Huson, Claire, Hyder-Wright, Angela, Hyams, Catherine, Ikram, Sabina, Ishwarbhai, Alka, Ivan, Monica, Iveson, Poppy, Iyer, Vidyashankara, Jackson, Frederic, De Jager, Jeanne, Jaumdally, Shameem, Jeffers, Helen, Jesudason, Natasha, Jones, Bryony, Jones, Kathryn, Jones, Elizabeth, Jones, Christopher, Jorge, Marianna Rocha, Jose, Aylin, Joshi, Amar, Júnior, Eduardo A.M.S., Kadziola, Joanne, Kailath, Reshma, Kana, Faeeza, Karampatsas, Konstantinos, Kasanyinga, Mwila, Keen, Jade, Kelly, Elizabeth J., Kelly, Dearbhla M., Kelly, Debbie, Kelly, Sarah, Kerr, David, Kfouri, Renato de Ávila, Khan, Liaquat, Khozoee, Baktash, Kidd, Sarah, Killen, Annabel, Kinch, Jasmin, Kinch, Patrick, King, Lloyd D.W., King, Thomas B., Kingham, Lucy, Klenerman, Paul, Knapper, Francesca, Knight, Julian C., Knott, Daniel, Koleva, Stanislava, Lang, Matilda, Lang, Gail, Larkworthy, Colin W., Larwood, Jessica P.J., Law, Rebecca, Lazarus, Erica M., Leach, Amanda, Lees, Emily A., Lemm, Nana-Marie, Lessa, Alvaro, Leung, Stephanie, Li, Yuanyuan, Lias, Amelia M., Liatsikos, Kostas, Linder, Aline, Lipworth, Samuel, Liu, Shuchang, Liu, Xinxue, Lloyd, Adam, Lloyd, Stephanie, Loew, Lisa, Lopez Ramon, Raquel, Lora, Leandro, Lowthorpe, Vicki, Luz, Kleber, MacDonald, Jonathan C., MacGregor, Gordon, Madhavan, Meera, Mainwaring, David O., Makambwa, Edson, Makinson, Rebecca, Malahleha, Mookho, Malamatsho, Ross, Mallett, Garry, Mansatta, Kushal, Maoko, Takalani, Mapetla, Katlego, Marchevsky, Natalie G., Marinou, Spyridoula, Marlow, Emma, Marques, Gabriela N., Marriott, Paula, Marshall, Richard P., Marshall, Julia L., Martins, Flávia J., Masenya, Masebole, Masilela, Mduduzi, Masters, Shauna K., Mathew, Moncy, Matlebjane, Hosea, Matshidiso, Kedidimetse, Mazur, Olga, Mazzella, Andrea, McCaughan, Hugh, McEwan, Joanne, McGlashan, Joanna, McInroy, Lorna, McIntyre, Zoe, McLenaghan, Daniela, McRobert, Nicky, McSwiggan, Steve, Megson, Clare, Mehdipour, Savviz, Meijs, Wilma, Mendonça, Renata N.Á., Mentzer, Alexander J., Mirtorabi, Neginsadat, Mitton, Celia, Mnyakeni, Sibusiso, Moghaddas, Fiona, Molapo, Kgaogelo, Moloi, Mapule, Moore, Maria, Moraes-Pinto, M. Isabel, Moran, Marni, Morey, Ella, Morgans, Róisín, Morris, Susan, Morris, Sheila, Morris, Helen C., Morselli, Franca, Morshead, Gertraud, Morter, Richard, Mottal, Lynelle, Moultrie, Andrew, Moya, Nathifa, Mpelembue, Mushiya, Msomi, Sibekezelo, Mugodi, Yvonne, Mukhopadhyay, Ekta, Muller, Jilly, Munro, Alasdair, Munro, Claire, Murphy, Sarah, Mweu, Philomena, Myasaki, Celia Hatsuko, Naik, Gurudutt, Naker, Kush, Nastouli, Eleni, Nazir, Abida, Ndlovu, Bongani, Neffa, Fabio, Njenga, Cecilia, Noal, Helena, Noé, Andrés, Novaes, Gabrielle, Nugent, Fay L., Nunes, Géssika, O'Brien, Katie, O'Connor, Daniel, Odam, Miranda, Oelofse, Suzette, Oguti, Blanche, Olchawski, Victoria, Oldfield, Neil J., Oliveira, Marianne G., Oliveira, Catarina, Oosthuizen, Angela, O'Reilly, Paula, Osborne, Piper, Owen, David R.J., Owen, Lydia, Owens, Daniel, Owino, Nelly, Pacurar, Mihaela, Paiva, Brenda V.B., Palhares, Edna M.F., Palmer, Susan, Parkinson, Sivapriyai, Parracho, Helena M.R.T., Parsons, Karen, Patel, Dipak, Patel, Bhumika, Patel, Faeezah, Patel, Kelly, Patrick-Smith, Maia, Payne, Ruth O., Peng, Yanchun, Penn, Elizabeth J., Pennington, Anna, Peralta Alvarez, Marco Polo, Perring, James, Perry, Nicola, Perumal, Rubeshan, Petkar, Sahir, Philip, Tricia, Phillips, Daniel J., Phillips, Jennifer, Phohu, Mary Kgomotso, Pickup, Lorinda, Pieterse, Sonja, Piper, Jo, Pipini, Dimitra, Plank, Mary, Du Plessis, Joan, Pollard, Samuel, Pooley, Jennifer, Pooran, Anil, Poulton, Ian, Powers, Claire, Presa, Fernando B., Price, David A., Price, Vivien, Primeira, Marcelo, Proud, Pamela C., Provstgaard-Morys, Samuel, Pueschel, Sophie, Pulido, David, Quaid, Sheena, Rabara, Ria, Radford, Alexandra, Radia, Kajal, Rajapaska, Durga, Rajeswaran, Thurkka, Ramos, Alberto San Francisco, Ramos Lopez, Fernando, Rampling, Tommy, Rand, Jade, Ratcliffe, Helen, Rawlinson, Tom, Rea, David, Rees, Byron, Reiné, Jesús, Resuello-Dauti, Mila, Reyes Pabon, Emilia, Ribiero, Carla M., Ricamara, Marivic, Richter, Alex, Ritchie, Neil, Ritchie, Adam J., Robbins, Alexander J., Roberts, Hannah, Robinson, Ryan E., Robinson, Hannah, Rocchetti, Talita T., Rocha, Beatriz Pinho, Roche, Sophie, Rollier, Christine, Rose, Louisa, Ross Russell, Amy L., Rossouw, Lindie, Royal, Simon, Rudiansyah, Indra, Ruiz, Sarah, Saich, Stephen, Sala, Claudia, Sale, Jessica, Salman, Ahmed M., Salvador, Natalia, Salvador, Stephannie, Sampaio, Milla, Samson, Annette D., Sanchez-Gonzalez, Amada, Sanders, Helen, Sanders, Katherine, Santos, Erika, Santos Guerra, Mayara F.S., Satti, Iman, Saunders, Jack E., Saunders, Caroline, Sayed, Aakifah, Schim van der Loeff, Ina, Schmid, Annina B., Schofield, Ella, Screaton, Gavin, Seddiqi, Samiullah, Segireddy, Rameswara R., Senger, Roberta, Serrano, Sonia, Shah, Rajiv, Shaik, Imam, Sharpe, Hannah E., Sharrocks, Katherine, Shaw, Robert, Shea, Adam, Shepherd, Amy, Shepherd, James G., Shiham, Farah, Sidhom, Emad, Silk, Sarah E., da Silva Moraes, Antonio Carlos, Silva-Junior, Gilberto, Silva-Reyes, Laura, Silveira, Anderson D., Silveira, Mariana B.V., Sinha, Jaisi, Skelly, Donal T., Smith, Daniel C., Smith, Nick, Smith, Holly E., Smith, David J., Smith, Catherine C., Soares, Airanuédida, Soares, Tiago, Solórzano, Carla, Sorio, Guilherme L., Sorley, Kim, Sosa-Rodriguez, Tiffany, Souza, Cinthia M.C.D.L., Souza, Bruno S.D.F., Souza, Alessandra R., Spencer, Alexandra J., Spina, Fernanda, Spoors, Louise, Stafford, Lizzie, Stamford, Imogen, Starinskij, Igor, Stein, Ricardo, Steven, Jill, Stockdale, Lisa, Stockwell, Lisa V., Strickland, Louise H., Stuart, Arabella C., Sturdy, Ann, Sutton, Natalina, Szigeti, Anna, Tahiri-Alaoui, Abdessamad, Tanner, Rachel, Taoushanis, Carol, Tarr, Alexander W., Taylor, Keja, Taylor, Ursula, Taylor, Iona Jennifer, Taylor, Justin, te Water Naude, Rebecca, Themistocleous, Yrene, Themistocleous, Andreas, Thomas, Merin, Thomas, Kelly, Thomas, Tonia M., Thombrayil, Asha, Thompson, Fawziyah, Thompson, Amber, Thompson, Kevin, Thompson, Ameeka, Thomson, Julia, Thornton-Jones, Viv, Tighe, Patrick J., Tinoco, Lygia Accioly, Tiongson, Gerlynn, Tladinyane, Bonolo, Tomasicchio, Michele, Tomic, Adriana, Tonks, Susan, Towner, James, Tran, Nguyen, Tree, Julia, Trillana, Gerry, Trinham, Charlotte, Trivett, Rose, Truby, Adam, Tsheko, Betty Lebogang, Turabi, Aadil, Turner, Richard, Turner, Cheryl, Ulaszewska, Marta, Underwood, Benjamin R., Varughese, Rachel, Verbart, Dennis, Verheul, Marije, Vichos, Iason, Vieira, Taiane, Waddington, Claire S., Walker, Laura, Wallis, Erica, Wand, Matthew, Warbick, Deborah, Wardell, Theresa, Warimwe, George, Warren, Sarah C., Watkins, Bridget, Watson, Ekaterina, Webb, Stewart, Webb-Bridges, Alice, Webster, Angela, Welch, Jessica, Wells, Jeanette, West, Alison, White, Caroline, White, Rachel, Williams, Paul, Williams, Rachel L., Winslow, Rebecca, Woodyer, Mark, Worth, Andrew T., Wright, Danny, Wroblewska, Marzena, Yao, Andy, Zimmer, Rafael, Zizi, Dalila, Zuidewind, Peter, Voysey, Merryn, Clemens, Sue Ann Costa, Madhi, Shabir A, Weckx, Lily Y, Folegatti, Pedro M, Aley, Parvinder K, Angus, Brian, Baillie, Vicky L, Barnabas, Shaun L, Bhorat, Qasim E, Bibi, Sagida, Briner, Carmen, Cicconi, Paola, Collins, Andrea M, Colin-Jones, Rachel, Cutland, Clare L, Darton, Thomas C, Dheda, Keertan, Duncan, Christopher J A, Emary, Katherine R W, Ewer, Katie J, Fairlie, Lee, Faust, Saul N, Ferreira, Daniela M, Finn, Adam, Goodman, Anna L, Green, Catherine M, Green, Christopher A, Heath, Paul T, Hill, Catherine, Hill, Helen, Hirsch, Ian, Hodgson, Susanne H C, Izu, Alane, Jackson, Susan, Jenkin, Daniel, Joe, Carina C D, Kerridge, Simon, Koen, Anthonet, Kwatra, Gaurav, Lazarus, Rajeka, Lawrie, Alison M, Lelliott, Alice, Libri, Vincenzo, Lillie, Patrick J, Mallory, Raburn, Mendes, Ana V A, Milan, Eveline P, Minassian, Angela M, McGregor, Alastair, Morrison, Hazel, Mujadidi, Yama F, Nana, Anusha, O’Reilly, Peter J, Padayachee, Sherman D, Pittella, Ana, Plested, Emma, Pollock, Katrina M, Ramasamy, Maheshi N, Rhead, Sarah, Schwarzbold, Alexandre V, Singh, Nisha, Smith, Andrew, Song, Rinn, Snape, Matthew D, Sprinz, Eduardo, Sutherland, Rebecca K, Tarrant, Richard, Thomson, Emma C, Török, M Estée, Toshner, Mark, Turner, David P J, Vekemans, Johan, Villafana, Tonya L, Watson, Marion E E, Williams, Christopher J, Douglas, Alexander D, Hill, Adrian V S, Lambe, Teresa, Gilbert, Sarah C, and Pollard, Andrew J
Published: 2021
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3. Increasing value and reducing waste in research design, conduct, and analysis

Author: Ioannidis, John PA, Greenland, Sander, Hlatky, Mark A, Khoury, Muin J, Macleod, Malcolm R, Moher, David, Schulz, Kenneth F, and Tibshirani, Robert
Subjects: Generic health relevance, Reproducibility of Results, Research Design, Research Personnel, Reward, Statistics as Topic, Medical and Health Sciences, General & Internal Medicine
Abstract: Correctable weaknesses in the design, conduct, and analysis of biomedical and public health research studies can produce misleading results and waste valuable resources. Small effects can be difficult to distinguish from bias introduced by study design and analyses. An absence of detailed written protocols and poor documentation of research is common. Information obtained might not be useful or important, and statistical precision or power is often too low or used in a misleading way. Insufficient consideration might be given to both previous and continuing studies. Arbitrary choice of analyses and an overemphasis on random extremes might affect the reported findings. Several problems relate to the research workforce, including failure to involve experienced statisticians and methodologists, failure to train clinical researchers and laboratory scientists in research methods and design, and the involvement of stakeholders with conflicts of interest. Inadequate emphasis is placed on recording of research decisions and on reproducibility of research. Finally, reward systems incentivise quantity more than quality, and novelty more than reliability. We propose potential solutions for these problems, including improvements in protocols and documentation, consideration of evidence from studies in progress, standardisation of research efforts, optimisation and training of an experienced and non-conflicted scientific workforce, and reconsideration of scientific reward systems.
Published: 2014

4. First experience of COVID-19 screening of health-care workers in England

Author: Ewan Hunter, David A Price, Dennis Lendrem, Ina Schim van der Loeff, Kenneth F Baker, Brendan A I Payne, Elizabeth Murphy, A. R. Welch, Matthias Schmid, Clare Lendrem, Christopher J A Duncan, and Lucia Pareja-Cebrian
Subjects: medicine.medical_specialty, Time Factors, Coronavirus disease 2019 (COVID-19), Health Personnel, Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), Pneumonia, Viral, MEDLINE, Real-Time Polymerase Chain Reaction, Return to work, State Medicine, Betacoronavirus, COVID-19 Testing, Return to Work, Health care, Pandemic, Mass Screening, Medicine, Pandemics, Mass screening, Clinical Laboratory Techniques, SARS-CoV-2, business.industry, COVID-19, General Medicine, England, Family medicine, Quarantine, Coronavirus Infections, business
Published: 2020
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5. Single-dose administration and the influence of the timing of the booster dose on immunogenicity and efficacy of ChAdOx1 nCoV-19 (AZD1222) vaccine: a pooled analysis of four randomised trials

Author: Voysey, Merryn, primary, Costa Clemens, Sue Ann, additional, Madhi, Shabir A, additional, Weckx, Lily Y, additional, Folegatti, Pedro M, additional, Aley, Parvinder K, additional, Angus, Brian, additional, Baillie, Vicky L, additional, Barnabas, Shaun L, additional, Bhorat, Qasim E, additional, Bibi, Sagida, additional, Briner, Carmen, additional, Cicconi, Paola, additional, Clutterbuck, Elizabeth A, additional, Collins, Andrea M, additional, Cutland, Clare L, additional, Darton, Thomas C, additional, Dheda, Keertan, additional, Dold, Christina, additional, Duncan, Christopher J A, additional, Emary, Katherine R W, additional, Ewer, Katie J, additional, Flaxman, Amy, additional, Fairlie, Lee, additional, Faust, Saul N, additional, Feng, Shuo, additional, Ferreira, Daniela M, additional, Finn, Adam, additional, Galiza, Eva, additional, Goodman, Anna L, additional, Green, Catherine M, additional, Green, Christopher A, additional, Greenland, Melanie, additional, Hill, Catherine, additional, Hill, Helen C, additional, Hirsch, Ian, additional, Izu, Alane, additional, Jenkin, Daniel, additional, Joe, Carina C D, additional, Kerridge, Simon, additional, Koen, Anthonet, additional, Kwatra, Gaurav, additional, Lazarus, Rajeka, additional, Libri, Vincenzo, additional, Lillie, Patrick J, additional, Marchevsky, Natalie G, additional, Marshall, Richard P, additional, Mendes, Ana V A, additional, Milan, Eveline P, additional, Minassian, Angela M, additional, McGregor, Alastair, additional, Mujadidi, Yama F, additional, Nana, Anusha, additional, Padayachee, Sherman D, additional, Phillips, Daniel J, additional, Pittella, Ana, additional, Plested, Emma, additional, Pollock, Katrina M, additional, Ramasamy, Maheshi N, additional, Ritchie, Adam J, additional, Robinson, Hannah, additional, Schwarzbold, Alexandre V, additional, Smith, Andrew, additional, Song, Rinn, additional, Snape, Matthew D, additional, Sprinz, Eduardo, additional, Sutherland, Rebecca K, additional, Thomson, Emma C, additional, Török, M Estée, additional, Toshner, Mark, additional, Turner, David P J, additional, Vekemans, Johan, additional, Villafana, Tonya L, additional, White, Thomas, additional, Williams, Christopher J, additional, Douglas, Alexander D, additional, Hill, Adrian V S, additional, Lambe, Teresa, additional, Gilbert, Sarah C, additional, Pollard, Andrew J, additional, Aban, Marites, additional, Abeyskera, Kushala W.M., additional, Aboagye, Jeremy, additional, Adam, Matthew, additional, Adams, Kirsty, additional, Adamson, James P., additional, Adewatan, Gbadebo, additional, Adlou, Syed, additional, Ahmed, Khatija, additional, Akhalwaya, Yasmeen, additional, Akhalwaya, Saajida, additional, Alcock, Andrew, additional, Ali, Aabidah, additional, Allen, Elizabeth R., additional, Allen, Lauren, additional, Alvernaz, Felipe B., additional, Amorim, Fabio Santos, additional, Andrade, Claudia Sala, additional, Andritsou, Foteini, additional, Anslow, Rachel, additional, Arbe-Barnes, Edward H., additional, Ariaans, Mark P., additional, Arns, Beatriz, additional, Arruda, Laiana, additional, Assad, Luiza, additional, Azi, Paula De Almeida, additional, Azi, Lorena De Almeida, additional, Babbage, Gavin, additional, Bailey, Catherine, additional, Baker, Kenneth F., additional, Baker, Megan, additional, Baker, Natalie, additional, Baker, Philip, additional, Baleanu, Ioana, additional, Bandeira, Danieli, additional, Bara, Anna, additional, Barbosa, Marcella A.S., additional, Barker, Debbie, additional, Barlow, Gavin D., additional, Barnes, Eleanor, additional, Barr, Andrew S., additional, Barrett, Jordan R., additional, Barrett, Jessica, additional, Barrett, Kelly, additional, Bates, Louise, additional, Batten, Alexander, additional, Beadon, Kirsten, additional, Beales, Emily, additional, Beckley, Rebecca, additional, Belij-Rammerstorfer, Sandra, additional, Bell, Jonathan, additional, Bellamy, Duncan, additional, Belton, Sue, additional, Berg, Adam, additional, Bermejo, Laura, additional, Berrie, Eleanor, additional, Berry, Lisa, additional, Berzenyi, Daniella, additional, Beveridge, Amy, additional, Bewley, Kevin R., additional, Bharaj, Inderjeet, additional, Bhikha, Sutika, additional, Bhorat, Asad E., additional, Bhorat, Zaheda E., additional, Bijker, Else Margreet, additional, Birch, Sarah, additional, Birch, Gurpreet, additional, Birchall, Kathryn, additional, Bird, Adam, additional, Bird, Olivia, additional, Bisnauthsing, Karen, additional, Bittaye, Mustapha, additional, Blackwell, Luke, additional, Blacow, Rachel, additional, Bletchly, Heather, additional, Blundell, Caitlin L., additional, Blundell, Susannah R., additional, Bodalia, Pritesh, additional, Bolam, Emma, additional, Boland, Elena, additional, Bormans, Daan, additional, Borthwick, Nicola, additional, Bowring, Francesca, additional, Boyd, Amy, additional, Bradley, Penny, additional, Brenner, Tanja, additional, Bridges-Webb, Alice, additional, Brown, Phillip, additional, Brown, Claire, additional, Brown-O'Sullivan, Charlie, additional, Bruce, Scott, additional, Brunt, Emily, additional, Budd, William, additional, Bulbulia, Yusuf A., additional, Bull, Melanie, additional, Burbage, Jamie, additional, Burn, Aileen, additional, Buttigieg, Karen R., additional, Byard, Nicholas, additional, Cabrera Puig, Ingrid, additional, Calvert, Anna, additional, Camara, Susana, additional, Cao, Michelangelo, additional, Cappuccini, Federica, additional, Cardona, Rita, additional, Cardoso, João R., additional, Carr, Melanie, additional, Carroll, Miles W., additional, Carson-Stevens, Andrew, additional, Carvalho, Yasmin de M., additional, Casey, Helen R., additional, Cashen, Paul, additional, Castro, Thais R.Y., additional, Castro, Lucia Carratala, additional, Cathie, Katrina, additional, Cavey, Ana, additional, Cerbino-Neto, José, additional, Cezar, Luiz Fernando F., additional, Chadwick, Jim, additional, Chanice, Chanice, additional, Chapman, David, additional, Charlton, Sue, additional, Cheliotis, Katerina S., additional, Chelysheva, Irina, additional, Chester, Oliver, additional, Chiplin, Emily, additional, Chita, Sunder, additional, Cho, Jee-Sun, additional, Cifuentes, Liliana, additional, Clark, Elizabeth, additional, Clark, Matthew, additional, Colin-Jones, Rachel, additional, Collins, Sarah L.K., additional, Colton, Hayley, additional, Conlon, Christopher P., additional, Connarty, Sean, additional, Coombes, Naomi, additional, Cooper, Cushla, additional, Cooper, Rachel, additional, Cornelissen, Lynne, additional, Corrah, Tumena, additional, Cosgrove, Catherine A., additional, Costa, Fernanda Barroso, additional, Cox, Tony, additional, Crocker, Wendy E.M., additional, Crosbie, Sarah, additional, Cullen, Dan, additional, Cunha, Debora R.M.F., additional, Cunningham, Christina J., additional, Cuthbertson, Fiona C., additional, da Costa, Daniel Marinho, additional, Da Guarda, Suzete N. Farias, additional, da Silva, Larissa P., additional, da Silva Moraes, Antonio Carlos, additional, Damratoski, Brad E., additional, Danos, Zsofia, additional, Dantas, Maria T.D.C., additional, Datoo, Mehreen S., additional, Datta, Chandrabali, additional, Davids, Malika, additional, Davies, Sarah L., additional, Davies, Kelly, additional, Davies, Hannah, additional, Davies, Sophie, additional, Davies, Judith, additional, Davis, Elizabeth J., additional, Davis, John, additional, de Carvalho, José A.M., additional, De Jager, Jeanne, additional, de Jesus Jnr, Sergio, additional, De Oliveira Kalid, Lis Moreno, additional, Dearlove, David, additional, Demissie, Tesfaye, additional, Desai, Amisha, additional, Di Marco, Stefania, additional, Di Maso, Claudio, additional, Dinesh, Tanya, additional, Docksey, Claire, additional, Dong, Tao, additional, Donnellan, Francesca R., additional, Dos Santos, Tannyth Gomes, additional, Dos Santos, Thainá G., additional, Dos Santos, Erika Pachecho, additional, Douglas, Naomi, additional, Downing, Charlotte, additional, Drake, Jonathan, additional, Drake-Brockman, Rachael, additional, Drury, Ruth, additional, Du Plessis, Joan, additional, Dunachie, Susanna J., additional, Duncan, Andrew, additional, Easom, Nicholas J.W., additional, Edwards, Mandy, additional, Edwards, Nick J., additional, Edwards, Frances, additional, El Muhanna, Omar M., additional, Elias, Sean C., additional, Ellison-Handley, Branwen, additional, Elmore, Michael J., additional, English, Marcus Rex, additional, Esmail, Alisgair, additional, Essack, Yakub Moosa, additional, Farooq, Mutjaba, additional, Fedosyuk, Sofiya, additional, Felle, Sally, additional, Ferguson, Susie, additional, Ferreira Da Silva, Carla, additional, Field, Samantha, additional, Fisher, Richard, additional, Fletcher, James, additional, Fofie, Hazel, additional, Fok, Henry, additional, Ford, Karen J., additional, Fothergill, Ross, additional, Fowler, Jamie, additional, Fraiman, Pedro H.A., additional, Francis, Emma, additional, Franco, Marilia M., additional, Frater, John, additional, Freire, Marilúcia S.M., additional, Fry, Samantha H., additional, Fudge, Sabrina, additional, Furlan Filho, Renato, additional, Furze, Julie, additional, Fuskova, Michelle, additional, Galian-Rubio, Pablo, additional, Garlant, Harriet, additional, Gavrila, Madita, additional, Gibbons, Karyna A., additional, Gilbride, Ciaran, additional, Gill, Hardeep, additional, Godwin, Kerry, additional, Gokani, Karishma, additional, Gonçalves, Maria Luisa Freire, additional, Gonzalez, Isabela G.S., additional, Goodall, Jack, additional, Goodwin, Jayne, additional, Goondiwala, Amina, additional, Gordon-Quayle, Katherine, additional, Gorini, Giacomo, additional, Goyanna, Alvaro, additional, Grab, Janet, additional, Gracie, Lara, additional, Green, Justin, additional, Greenwood, Nicola, additional, Greffrath, Johann, additional, Groenewald, Marisa M., additional, Gunawardene, Anishka, additional, Gupta, Gaurav, additional, Hackett, Mark, additional, Hallis, Bassam, additional, Hamaluba, Mainga, additional, Hamilton, Elizabeth, additional, Hamlyn, Joseph, additional, Hammersley, Daniel, additional, Hanrath, Aidan T., additional, Hanumunthadu, Brama, additional, Harris, Stephanie A., additional, Harris, Clair, additional, Harrison, Thomas D., additional, Harrison, Daisy, additional, Harris-Wright, Tara A., additional, Hart, Thomas C., additional, Hartnell, Birgit, additional, Haughney, John, additional, Hawkins, Sophia, additional, Hayano, Laís Y.M., additional, Head, Ian, additional, Heath, Paul T., additional, Henry, John Aaron, additional, Hermosin Herrera, Macarena, additional, Hettle, David B., additional, Higa, Cristhiane, additional, Hill, Jennifer, additional, Hodges, Gina, additional, Hodgson, Susanne, additional, Horne, Elizea, additional, Hou, Mimi M., additional, Houlihan, Catherine F., additional, Howe, Elizabeth, additional, Howell, Nicola, additional, Humphreys, Jonathan, additional, Humphries, Holly E., additional, Hurley, Katrina, additional, Huson, Claire, additional, Hyams, Catherine, additional, Hyder-Wright, Angela, additional, Ikram, Sabina, additional, Ishwarbhai, Alka, additional, Iveson, Poppy, additional, Iyer, Vidyashankara, additional, Jackson, Frederic, additional, Jackson, Susan, additional, Jaumdally, Shameem, additional, Jeffers, Helen, additional, Jesudason, Natasha, additional, Jones, Carina, additional, Jones, Christopher, additional, Jones, Kathryn, additional, Jones, Elizabeth, additional, Jorge, Marianna Rocha, additional, Joshi, Amar, additional, Júnior, Eduardo A.M.S., additional, Kailath, Reshma, additional, Kana, Faeeza, additional, Kar, Arnab, additional, Karampatsas, Konstantinos, additional, Kasanyinga, Mwila, additional, Kay, Linda, additional, Keen, Jade, additional, Kellett Wright, Johanna, additional, Kelly, Elizabeth J., additional, Kelly, Debbie, additional, Kelly, Dearbhla M., additional, Kelly, Sarah, additional, Kerr, David, additional, Khan, Liaquat, additional, Khozoee, Baktash, additional, Khurana, Ankush, additional, Kidd, Sarah, additional, Killen, Annabel, additional, Kinch, Jasmin, additional, Kinch, Patrick, additional, King, Lloyd D.W., additional, King, Thomas B., additional, Kingham, Lucy, additional, Klenerman, Paul, additional, Kluczna, Diana M., additional, Knapper, Francesca, additional, Knight, Julian C., additional, Knott, Daniel, additional, Koleva, Stanislava, additional, Lages, Pedro M., additional, Lang, Matilda, additional, Lang, Gail, additional, Larkworthy, Colin W., additional, Larwood, Jessica P.J., additional, Law, Rebecca, additional, Lawrie, Alison M., additional, Lazarus, Erica M., additional, Leach, Amanda, additional, Lees, Emily A., additional, Lelliott, Alice, additional, Lemm, Nana-Marie, additional, Lessa, Alvaro Edson Ramos, additional, Leung, Stephanie, additional, Li, Yuanyuan, additional, Lias, Amelia M., additional, Liatsikos, Konstantinos, additional, Linder, Aline, additional, Lipworth, Samuel, additional, Liu, Shuchang, additional, Liu, Xinxue, additional, Lloyd, Adam, additional, Lloyd, Stephanie, additional, Loew, Lisa, additional, Lopez Ramon, Raquel, additional, Lora, Leandro Bonecker, additional, Luz, Kleber Giovanni, additional, MacDonald, Jonathan C., additional, MacGregor, Gordon, additional, Madhavan, Meera, additional, Mainwaring, David O., additional, Makambwa, Edson, additional, Makinson, Rebecca, additional, Malahleha, Mookho, additional, Malamatsho, Ross, additional, Mallett, Garry, additional, Manning, Nicola, additional, Mansatta, Kushal, additional, Maoko, Takalani, additional, Marinou, Spyridoula, additional, Marlow, Emma, additional, Marques, Gabriela N., additional, Marriott, Paula, additional, Marshall, Richard P., additional, Marshall, Julia L., additional, Masenya, Masebole, additional, Masilela, Mduduzi, additional, Masters, Shauna K., additional, Mathew, Moncy, additional, Matlebjane, Hosea, additional, Matshidiso, Kedidimetse, additional, Mazur, Olga, additional, Mazzella, Andrea, additional, McCaughan, Hugh, additional, McEwan, Joanne, additional, McGlashan, Joanna, additional, McInroy, Lorna, additional, McRobert, Nicky, additional, McSwiggan, Steve, additional, Megson, Clare, additional, Mehdipour, Savviz, additional, Meijs, Wilma, additional, Mendonça, Renata N.Õ., additional, Mentzer, Alexander J., additional, Mesquita, Ana Carolina F., additional, Miralhes, Patricia, additional, Mirtorabi, Neginsadat, additional, Mitton, Celia, additional, Mnyakeni, Sibusiso, additional, Moghaddas, Fiona, additional, Molapo, Kgaogelo, additional, Moloi, Mapule, additional, Moore, Maria, additional, Moran, Marni, additional, Morey, Ella, additional, Morgans, Róisín, additional, Morris, Susan J., additional, Morris, Sheila, additional, Morrison, Hazel, additional, Morselli, Franca, additional, Morshead, Gertraud, additional, Morter, Richard, additional, Mottay, Lynelle, additional, Moultrie, Andrew, additional, Moyo, Nathifa, additional, Mpelembue, Mushiya, additional, Msomi, Sibekezelo, additional, Mugodi, Yvonne, additional, Mukhopadhyay, Ekta, additional, Muller, Jilly, additional, Munro, Alasdair, additional, Murphy, Sarah, additional, Mweu, Philomena, additional, Myerscough, Christopher, additional, Naik, Gurudutt, additional, Naker, Kush, additional, Nastouli, Eleni, additional, Ndlovu, Bongani, additional, Nikolaou, Elissavet, additional, Njenga, Cecilia, additional, Noal, Helena C., additional, Noé, Andrés, additional, Novaes, Gabrielle, additional, Nugent, Fay L., additional, Nunes, Géssika Lanzillo A., additional, O'Brien, Katie, additional, O'Connor, Daniel, additional, Oelofse, Suzette, additional, Oguti, Blanche, additional, Olchawski, Victoria, additional, Oldfield, Neil J., additional, Oliveira, Marianne G., additional, Oliveira, Catarina, additional, Oliveira, Isabelle Silva Queiroz, additional, Oommen-Jose, Aylin, additional, Oosthuizen, Angela, additional, O'Reilly, Paula, additional, O'Reilly, Peter J., additional, Osborne, Piper, additional, Owen, David R.J., additional, Owen, Lydia, additional, Owens, Daniel, additional, Owino, Nelly, additional, Pacurar, Mihaela, additional, Paiva, Brenda V.B., additional, Palhares, Edna M.F., additional, Palmer, Susan, additional, Parracho, Helena M. R.T., additional, Parsons, Karen, additional, Patel, Dipak, additional, Patel, Bhumika, additional, Patel, Faeezah, additional, Patrick-Smith, Maia, additional, Payne, Ruth O., additional, Peng, Yanchun, additional, Penn, Elizabeth J., additional, Pennington, Anna, additional, Peralta Alvarez, Marco Polo, additional, Pereira Stuchi, Bruno Pereira, additional, Perez, Ana Luiza, additional, Perinpanathan, Tanaraj, additional, Perring, James, additional, Perumal, Rubeshan, additional, Petkar, Sahir Yusuf, additional, Philip, Tricia, additional, Phillips, Jennifer, additional, Phohu, Mary Kgomotso, additional, Pickup, Lorinda, additional, Pieterse, Sonja, additional, Pinheiro, Jessica Morgana, additional, Piper, Jo, additional, Pipini, Dimitra, additional, Plank, Mary, additional, Plant, Sinéad, additional, Pollard, Samuel, additional, Pooley, Jennifer, additional, Pooran, Anil, additional, Poulton, Ian, additional, Powers, Claire, additional, Presa, Fernando B., additional, Price, David A., additional, Price, Vivien, additional, Primeira, Marcelo R., additional, Proud, Pamela C., additional, Provstgaard-Morys, Samuel, additional, Pueschel, Sophie, additional, Pulido, David, additional, Quaid, Sheena, additional, Rabara, Ria, additional, Radia, Kajal, additional, Rajapaska, Durga, additional, Rajeswaran, Thurkka, additional, Ramos, Leonardo, additional, Ramos, Alberto San Francisco, additional, Ramos Lopez, Fernando, additional, Rampling, Tommy, additional, Rand, Jade, additional, Ratcliffe, Helen, additional, Rawlinson, Tom, additional, Rea, David, additional, Rees, Byron, additional, Resuello-Dauti, Mila, additional, Reyes Pabon, Emilia, additional, Rhead, Sarah, additional, Riaz, Tawassal, additional, Ricamara, Marivic, additional, Richards, Alexander, additional, Richter, Alex, additional, Ritchie, Neil, additional, Ritchie, Adam J., additional, Robbins, Alexander J., additional, Roberts, Hannah, additional, Robinson, Ryan E., additional, Roche, Sophie, additional, Rollier, Christine, additional, Rose, Louisa, additional, Ross Russell, Amy L., additional, Rossouw, Lindie, additional, Royal, Simon, additional, Rudiansyah, Indra, additional, Ryalls, Kim, additional, Sabine, Charlotte, additional, Saich, Stephen, additional, Sale, Jessica C., additional, Salman, Ahmed M., additional, Salvador, Natalia, additional, Salvador, Stephannie, additional, Sampaio, Milla Dias, additional, Samson, Annette D., additional, Sanchez-Gonzalez, Amada, additional, Sanders, Helen, additional, Sanders, Katherine, additional, Santos, Erika, additional, Santos Guerra, Mayara F.S., additional, Satti, Iman, additional, Saunders, Jack E., additional, Saunders, Caroline, additional, Sayed, Aakifah Bibi Arif, additional, Schim van der Loeff, Ina, additional, Schmid, Annina B., additional, Schofield, Ella, additional, Screaton, Gavin R., additional, Seddiqi, Samiullah, additional, Segireddy, Rameswara R., additional, Senger, Roberta, additional, Serrano, Sonia, additional, Shaik, Imam, additional, Sharpe, Hannah R., additional, Sharrocks, Katherine, additional, Shaw, Robert, additional, Shea, Adam, additional, Sheehan, Emma, additional, Shepherd, Amy, additional, Shiham, Farah, additional, Silk, Sarah E., additional, Silva-Reyes, Laura, additional, Silveira, Lidiana B. T.D., additional, Silveira, Mariana B.V., additional, Singh, Nisha, additional, Sinha, Jaisi, additional, Skelly, Donal T., additional, Smith, Daniel C., additional, Smith, Nick, additional, Smith, Holly E., additional, Smith, David J., additional, Smith, Catherine C., additional, Soares, Airanuédida S., additional, Solórzano, Carla, additional, Sorio, Guilherme L., additional, Sorley, Kim, additional, Sosa-Rodriguez, Tiffany, additional, Souza, Cinthia M.C.D.L., additional, Souza, Bruno S.D.F., additional, Souza, Alessandra R., additional, Souza Lopez, Thamyres, additional, Sowole, Luciana, additional, Spencer, Alexandra J., additional, Spoors, Louise, additional, Stafford, Lizzie, additional, Stamford, Imogen, additional, Stein, Ricardo, additional, Stockdale, Lisa, additional, Stockwell, Lisa V., additional, Strickland, Louise H., additional, Stuart, Arabella, additional, Sturdy, Ann, additional, Sutton, Natalina, additional, Szigeti, Anna, additional, Tahiri-Alaoui, Abdessamad, additional, Tanner, Rachel, additional, Taoushanis, Carol, additional, Tarr, Alexander W., additional, Tarrant, Richard, additional, Taylor, Keja, additional, Taylor, Ursula, additional, Taylor, Iona Jennifer, additional, Taylor, Justin, additional, te Water Naude, Rebecca, additional, Templeton, Kate, additional, Themistocleous, Yrene, additional, Themistocleous, Andreas, additional, Thomas, Merin, additional, Thomas, Kelly, additional, Thomas, Tonia M., additional, Thombrayil, Asha, additional, Thompson, Julia, additional, Thompson, Fawziyah, additional, Thompson, Ameeka, additional, Thompson, Amber, additional, Thompson, Kevin, additional, Thornton-Jones, Viv, additional, Thotusi, Larissa H.S., additional, Tighe, Patrick J., additional, Tinoco, Lygia Accioly, additional, Tiongson, Gerlynn Ferreras, additional, Tladinyane, Bonolo, additional, Tomasicchio, Michele, additional, Tomic, Adriana, additional, Tonks, Susan, additional, Towner, James, additional, Tran, Nguyen, additional, Tree, Julia A., additional, Trillana, Gerry, additional, Trinham, Charlotte, additional, Trivett, Rose, additional, Truby, Adam, additional, Tsheko, Betty Lebogang, additional, Tubb, Philippa, additional, Turabi, Aadil, additional, Turner, Richard, additional, Turner, Cheryl, additional, Turner, Nicola, additional, Tyagi, Bhavya, additional, Ulaszewska, Marta, additional, Underwood, Benjamin R., additional, van Eck, Samual, additional, Varughese, Rachel, additional, Verbart, Dennis, additional, Verheul, Marije K., additional, Vichos, Iason, additional, Vieira, Taiane A., additional, Walker, Gemma, additional, Walker, Laura, additional, Wand, Matthew E., additional, Wardell, Theresa, additional, Warimwe, George M., additional, Warren, Sarah C., additional, Watkins, Bridget, additional, Watson, Marion E.E., additional, Watson, Ekaterina, additional, Webb, Stewart, additional, Webster, Angela, additional, Welch, Jessica, additional, Wellbelove, Zoe, additional, Wells, Jeanette H., additional, West, Alison J., additional, White, Beth, additional, White, Caroline, additional, White, Rachel, additional, Williams, Paul, additional, Williams, Rachel L., additional, Willingham, Silvia, additional, Winslow, Rebecca, additional, Woods, Danielle, additional, Woodyer, Mark, additional, Worth, Andrew T., additional, Wright, Danny, additional, Wroblewska, Marzena, additional, Yao, Andy, additional, Yim, Yee Ting Nicole, additional, Zambrano, Marina Bauer, additional, Zimmer, Rafael Leal, additional, Zizi, Dalila, additional, and Zuidewind, Peter, additional
Published: 2021
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6. Epidemiology 5: multiplicity in randomised trials II: subgroup and interim analyses

Author: Schulz, Kenneth F. and Grimes, David A.
Subjects: Clinical trials -- Analysis
Published: 2005

7. Multiplicity in randomised trials II: subgroup and interim analyses

Author: Schulz, Kenneth F. and Grimes, David A.
Published: 2005

8. Multiplicity in randomised trials I: endpoints and treatments

Author: Schulz, Kenneth F. and Grimes, David A.
Published: 2005

9. Epidemiology 3: refining clinical diagnosis with likelihood ratios

Author: Grimes, David A. and Schulz, Kenneth F.
Subjects: Medical tests -- Methods, Epidemiologists -- Practice, Evidence-based medicine
Published: 2005

10. Refining clinical diagnosis with likelihood ratios

Author: Grimes, David A. and Schulz, Kenneth F.
Published: 2005

11. Compared to what? Finding controls for case-control studies

Author: Grimes, David A. and Schulz, Kenneth F.
Subjects: Medical case management -- Analysis, Medical research -- Methods, Medical research -- Analysis, Medicine, Experimental -- Methods, Medicine, Experimental -- Analysis, Methodology -- Analysis, Teaching -- Equipment and supplies, Diagnostic imaging
Published: 2005

12. Epidemiology 1: sample size calculations in randomised trials: mandatory and mystical

Author: Schulz, Kenneth F. and Grimes, David A.
Subjects: Public health records -- Analysis, Clinical trials -- Analysis
Published: 2005

13. Sample size calculations in randomised trials: mandatory and mystical

Author: Schulz, Kenneth F. and Grimes, David A.
Published: 2005

14. Unequal group sizes in randomised trials: guarding against guessing

Author: Schulz, Kenneth F. and Grimes, David A.
Published: 2002

15. Uses and abuses of screening tests

Author: Grimes, David A. and Schulz, Kenneth F.
Published: 2002

16. Sample size slippages in randomised trials: exclusions and the lost and wayward

Author: Schulz, Kenneth F. and Grimes, David A.
Published: 2002

17. Blinding in randomised trials: hiding who got what

Author: Schulz, Kenneth F. and Grimes, David A.
Published: 2002

18. Allocation concealment in randomised trials: defending against deciphering

Author: Schulz, Kenneth F. and Grimes, David A.
Published: 2002

19. Generation of allocation sequences in randomised trials: chance, not choice

Author: Schulz, Kenneth F. and Grimes, David A.
Published: 2002

20. Case-control studies: research in reverse

Author: Schulz, Kenneth F. and Grimes, David A.
Published: 2002

21. Cohort studies: marching towards outcomes

Author: Grimes, David A. and Schulz, Kenneth F.
Subjects: Cohort analysis -- Usage, Health risk assessment -- Methods, Outcome and process assessment (Health Care) -- Methods
Published: 2002

22. Bias and causal associations in observational research

Author: Grimes, David A. and Schulz, Kenneth F.
Published: 2002

23. Descriptive studies: what they can and cannot do

Author: Grimes, David A. and Schulz, Kenneth F.
Published: 2002

24. An overview of clinical research: the lay of the land

Author: Grimes, David A. and Schulz, Kenneth F.
Published: 2002

25. Safety and efficacy of the ChAdOx1 nCoV-19 vaccine (AZD1222) against SARS-CoV-2: an interim analysis of four randomised controlled trials in Brazil, South Africa, and the UK

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D. S. C, additional, Alves, Mariana P.S., additional, Amorim, Fabio, additional, Andritsou, Foteini, additional, Anslow, Rachel, additional, Appleby, Matthew, additional, Arbe-Barnes, Edward H., additional, Ariaans, Mark P., additional, Arns, Beatriz, additional, Arruda, Laiana, additional, Azi, Paula, additional, Azi, Lorena, additional, Babbage, Gavin, additional, Bailey, Catherine, additional, Baker, Kenneth F., additional, Baker, Megan, additional, Baker, Natalie, additional, Baker, Philip, additional, Baldwin, Lisa, additional, Baleanu, Ioana, additional, Bandeira, Danieli, additional, Bara, Anna, additional, Barbosa, Marcella A.S., additional, Barker, Debbie, additional, Barlow, Gavin D., additional, Barnes, Eleanor, additional, Barr, Andrew S., additional, Barrett, Jordan R., additional, Barrett, Jessica, additional, Bates, Louise, additional, Batten, Alexander, additional, Beadon, Kirsten, additional, Beales, Emily, additional, Beckley, Rebecca, additional, Belij-Rammerstorfer, Sandra, additional, Bell, Jonathan, additional, Bellamy, Duncan, additional, Bellei, Nancy, additional, Belton, Sue, additional, Berg, Adam, additional, Bermejo, Laura, additional, Berrie, Eleanor, additional, Berry, Lisa, additional, Berzenyi, Daniella, additional, Beveridge, Amy, additional, Bewley, Kevin R., additional, Bexhell, Helen, additional, Bhikha, Sutika, additional, Bhorat, Asad E., additional, Bhorat, Zaheda E., additional, Bijker, Else, additional, Birch, Geeta, additional, Birch, Sarah, additional, Bird, Adam, additional, Bird, Olivia, additional, Bisnauthsing, Karen, additional, Bittaye, Mustapha, additional, Blackstone, Katherine, additional, Blackwell, Luke, additional, Bletchly, Heather, additional, Blundell, Caitlin L., additional, Blundell, Susannah R., additional, Bodalia, Pritesh, additional, Boettger, Bruno C., additional, Bolam, Emma, additional, Boland, Elena, additional, Bormans, Daan, additional, Borthwick, Nicola, additional, Bowring, Francesca, additional, Boyd, Amy, additional, Bradley, Penny, additional, Brenner, Tanja, additional, Brown, Phillip, additional, Brown, Claire, additional, Brown-O'Sullivan, Charlie, additional, Bruce, Scott, additional, Brunt, Emily, additional, Buchan, Ruaridh, additional, Budd, William, additional, Bulbulia, Yusuf A., additional, Bull, Melanie, additional, Burbage, Jamie, additional, Burhan, Hassan, additional, Burn, Aileen, additional, Buttigieg, Karen R., additional, Byard, Nicholas, additional, Cabera Puig, Ingrid, additional, Calderon, Gloria, additional, Calvert, Anna, additional, Camara, Susana, additional, Cao, Michelangelo, additional, Cappuccini, Federica, additional, Cardoso, João R., additional, Carr, Melanie, additional, Carroll, Miles W., additional, Carson-Stevens, Andrew, additional, Carvalho, Yasmin de M., additional, Carvalho, José A.M., additional, Casey, Helen R., additional, Cashen, Paul, additional, Castro, Thais, additional, Castro, Lucia Carratala, additional, Cathie, Katrina, additional, Cavey, Ana, additional, Cerbino-Neto, José, additional, Chadwick, Jim, additional, Chapman, David, additional, Charlton, Sue, additional, Chelysheva, Irina, additional, Chester, Oliver, additional, Chita, Sunder, additional, Cho, Jee-Sun, additional, Cifuentes, Liliana, additional, Clark, Elizabeth, additional, Clark, Matthew, additional, Clarke, Andrea, additional, Clutterbuck, Elizabeth A., additional, Collins, Sarah L.K., additional, Conlon, Christopher P., additional, Connarty, Sean, additional, Coombes, Naomi, additional, Cooper, Cushla, additional, Cooper, Rachel, additional, Cornelissen, Lynne, additional, Corrah, Tumena, additional, Cosgrove, Catherine, additional, Cox, Tony, additional, Crocker, Wendy E.M., additional, Crosbie, Sarah, additional, Cullen, Lorraine, additional, Cullen, Dan, additional, Cunha, Debora R.M.F., additional, Cunningham, Christina, additional, Cuthbertson, Fiona C., additional, Da Guarda, Suzete N. Farias, additional, da Silva, Larissa P., additional, Damratoski, Brad E., additional, Danos, Zsofia, additional, Dantas, Maria T.D.C., additional, Darroch, Paula, additional, Datoo, Mehreen S., additional, Datta, Chandrabali, additional, Davids, Malika, additional, Davies, Sarah L., additional, Davies, Hannah, additional, Davis, Elizabeth, additional, Davis, Judith, additional, Davis, John, additional, De Nobrega, Maristela M.D., additional, De Oliveira Kalid, Lis Moreno, additional, Dearlove, David, additional, Demissie, Tesfaye, additional, Desai, Amisha, additional, Di Marco, Stefania, additional, Di Maso, Claudio, additional, Dinelli, Maria I.S., additional, Dinesh, Tanya, additional, Docksey, Claire, additional, Dold, Christina, additional, Dong, Tao, additional, Donnellan, Francesca R., additional, Dos Santos, Tannyth, additional, dos Santos, Thainá G., additional, Dos Santos, Erika Pachecho, additional, Douglas, Naomi, additional, Downing, Charlotte, additional, Drake, Jonathan, additional, Drake-Brockman, Rachael, additional, Driver, Kimberley, additional, Drury, Ruth, additional, Dunachie, Susanna J., additional, Durham, Benjamin S., additional, Dutra, Lidiana, additional, Easom, Nicholas J.W., additional, van Eck, Samual, additional, Edwards, Mandy, additional, Edwards, Nick J., additional, El Muhanna, Omar M., additional, Elias, Sean C., additional, Elmore, Mike, additional, English, Marcus, additional, Esmail, Alisgair, additional, Essack, Yakub Moosa, additional, Farmer, Eoghan, additional, Farooq, Mutjaba, additional, Farrar, Madi, additional, Farrugia, Leonard, additional, Faulkner, Beverley, additional, Fedosyuk, Sofiya, additional, Felle, Sally, additional, Ferreira Da Silva, Carla, additional, Field, Samantha, additional, Fisher, Richard, additional, Flaxman, Amy, additional, Fletcher, James, additional, Fofie, Hazel, additional, Fok, Henry, additional, Ford, Karen J., additional, Fowler, Jamie, additional, Fraiman, Pedro H.A., additional, Francis, Emma, additional, Franco, Marilia M., additional, Frater, John, additional, Freire, Marilúcia S.M., additional, Fry, Samantha H., additional, Fudge, Sabrina, additional, Furze, Julie, additional, Fuskova, Michelle, additional, Galian-Rubio, Pablo, additional, Galiza, Eva, additional, Garlant, Harriet, additional, Gavrila, Madita, additional, Geddes, Ailsa, additional, Gibbons, Karyna A., additional, Gilbride, Ciaran, additional, Gill, Hardeep, additional, Glynn, Sharon, additional, Godwin, Kerry, additional, Gokani, Karishma, additional, Goldoni, Ursula Carvalho, additional, Goncalves, Maria, additional, Gonzalez, Isabela G.S., additional, Goodwin, Jayne, additional, Goondiwala, Amina, additional, Gordon-Quayle, Katherine, additional, Gorini, Giacomo, additional, Grab, Janet, additional, Gracie, Lara, additional, Greenland, Melanie, additional, Greenwood, Nicola, additional, Greffrath, Johann, additional, Groenewald, Marisa M., additional, Grossi, Leonardo, additional, Gupta, Gaurav, additional, Hackett, Mark, additional, Hallis, Bassam, additional, Hamaluba, Mainga, additional, Hamilton, Elizabeth, additional, Hamlyn, Joseph, additional, Hammersley, Daniel, additional, Hanrath, Aidan T., additional, Hanumunthadu, Brama, additional, Harris, Stephanie A., additional, Harris, Clair, additional, Harris, Tara, additional, Harrison, Thomas D., additional, Harrison, Daisy, additional, Hart, Thomas C., additional, Hartnell, Birgit, additional, Hassan, Shadin, additional, Haughney, John, additional, Hawkins, Sophia, additional, Hay, Jodie, additional, Head, Ian, additional, Henry, John, additional, Hermosin Herrera, Macarena, additional, Hettle, David B., additional, Hill, Jennifer, additional, Hodges, Gina, additional, Horne, Elizea, additional, Hou, Mimi M., additional, Houlihan, Catherine, additional, Howe, Elizabeth, additional, Howell, Nicola, additional, Humphreys, Jonathan, additional, Humphries, Holly E., additional, Hurley, Katrina, additional, Huson, Claire, additional, Hyder-Wright, Angela, additional, Hyams, Catherine, additional, Ikram, Sabina, additional, Ishwarbhai, Alka, additional, Ivan, Monica, additional, Iveson, Poppy, additional, Iyer, Vidyashankara, additional, Jackson, Frederic, additional, De Jager, Jeanne, additional, Jaumdally, Shameem, additional, Jeffers, Helen, additional, Jesudason, Natasha, additional, Jones, Bryony, additional, Jones, Kathryn, additional, Jones, Elizabeth, additional, Jones, Christopher, additional, Jorge, Marianna Rocha, additional, Jose, Aylin, additional, Joshi, Amar, additional, Júnior, Eduardo A.M.S., additional, Kadziola, Joanne, additional, Kailath, Reshma, additional, Kana, Faeeza, additional, Karampatsas, Konstantinos, additional, Kasanyinga, Mwila, additional, Keen, Jade, additional, Kelly, Elizabeth J., additional, Kelly, Dearbhla M., additional, Kelly, Debbie, additional, Kelly, Sarah, additional, Kerr, David, additional, Kfouri, Renato de Ávila, additional, Khan, Liaquat, additional, Khozoee, Baktash, additional, Kidd, Sarah, additional, Killen, Annabel, additional, Kinch, Jasmin, additional, Kinch, Patrick, additional, King, Lloyd D.W., additional, King, Thomas B., additional, Kingham, Lucy, additional, Klenerman, Paul, additional, Knapper, Francesca, additional, Knight, Julian C., additional, Knott, Daniel, additional, Koleva, Stanislava, additional, Lang, Matilda, additional, Lang, Gail, additional, Larkworthy, Colin W., additional, Larwood, Jessica P.J., additional, Law, Rebecca, additional, Lazarus, Erica M., additional, Leach, Amanda, additional, Lees, Emily A., additional, Lemm, Nana-Marie, additional, Lessa, Alvaro, additional, Leung, Stephanie, additional, Li, Yuanyuan, additional, Lias, Amelia M., additional, Liatsikos, Kostas, additional, Linder, Aline, additional, Lipworth, Samuel, additional, Liu, Shuchang, additional, Liu, Xinxue, additional, Lloyd, Adam, additional, Lloyd, Stephanie, additional, Loew, Lisa, additional, Lopez Ramon, Raquel, additional, Lora, Leandro, additional, Lowthorpe, Vicki, additional, Luz, Kleber, additional, MacDonald, Jonathan C., additional, MacGregor, Gordon, additional, Madhavan, Meera, additional, Mainwaring, David O., additional, Makambwa, Edson, additional, Makinson, Rebecca, additional, Malahleha, Mookho, additional, Malamatsho, Ross, additional, Mallett, Garry, additional, Mansatta, Kushal, additional, Maoko, Takalani, additional, Mapetla, Katlego, additional, Marchevsky, Natalie G., additional, Marinou, Spyridoula, additional, Marlow, Emma, additional, Marques, Gabriela N., additional, Marriott, Paula, additional, Marshall, Richard P., additional, Marshall, Julia L., additional, Martins, Flávia J., additional, Masenya, Masebole, additional, Masilela, Mduduzi, additional, Masters, Shauna K., additional, Mathew, Moncy, additional, Matlebjane, Hosea, additional, Matshidiso, Kedidimetse, additional, Mazur, Olga, additional, Mazzella, Andrea, additional, McCaughan, Hugh, additional, McEwan, Joanne, additional, McGlashan, Joanna, additional, McInroy, Lorna, additional, McIntyre, Zoe, additional, McLenaghan, Daniela, additional, McRobert, Nicky, additional, McSwiggan, Steve, additional, Megson, Clare, additional, Mehdipour, Savviz, additional, Meijs, Wilma, additional, Mendonça, Renata N.Á., additional, Mentzer, Alexander J., additional, Mirtorabi, Neginsadat, additional, Mitton, Celia, additional, Mnyakeni, Sibusiso, additional, Moghaddas, Fiona, additional, Molapo, Kgaogelo, additional, Moloi, Mapule, additional, Moore, Maria, additional, Moraes-Pinto, M. Isabel, additional, Moran, Marni, additional, Morey, Ella, additional, Morgans, Róisín, additional, Morris, Susan, additional, Morris, Sheila, additional, Morris, Helen C., additional, Morselli, Franca, additional, Morshead, Gertraud, additional, Morter, Richard, additional, Mottal, Lynelle, additional, Moultrie, Andrew, additional, Moya, Nathifa, additional, Mpelembue, Mushiya, additional, Msomi, Sibekezelo, additional, Mugodi, Yvonne, additional, Mukhopadhyay, Ekta, additional, Muller, Jilly, additional, Munro, Alasdair, additional, Munro, Claire, additional, Murphy, Sarah, additional, Mweu, Philomena, additional, Myasaki, Celia Hatsuko, additional, Naik, Gurudutt, additional, Naker, Kush, additional, Nastouli, Eleni, additional, Nazir, Abida, additional, Ndlovu, Bongani, additional, Neffa, Fabio, additional, Njenga, Cecilia, additional, Noal, Helena, additional, Noé, Andrés, additional, Novaes, Gabrielle, additional, Nugent, Fay L., additional, Nunes, Géssika, additional, O'Brien, Katie, additional, O'Connor, Daniel, additional, Odam, Miranda, additional, Oelofse, Suzette, additional, Oguti, Blanche, additional, Olchawski, Victoria, additional, Oldfield, Neil J., additional, Oliveira, Marianne G., additional, Oliveira, Catarina, additional, Oosthuizen, Angela, additional, O'Reilly, Paula, additional, Osborne, Piper, additional, Owen, David R.J., additional, Owen, Lydia, additional, Owens, Daniel, additional, Owino, Nelly, additional, Pacurar, Mihaela, additional, Paiva, Brenda V.B., additional, Palhares, Edna M.F., additional, Palmer, Susan, additional, Parkinson, Sivapriyai, additional, Parracho, Helena M.R.T., additional, Parsons, Karen, additional, Patel, Dipak, additional, Patel, Bhumika, additional, Patel, Faeezah, additional, Patel, Kelly, additional, Patrick-Smith, Maia, additional, Payne, Ruth O., additional, Peng, Yanchun, additional, Penn, Elizabeth J., additional, Pennington, Anna, additional, Peralta Alvarez, Marco Polo, additional, Perring, James, additional, Perry, Nicola, additional, Perumal, Rubeshan, additional, Petkar, Sahir, additional, Philip, Tricia, additional, Phillips, Daniel J., additional, Phillips, Jennifer, additional, Phohu, Mary Kgomotso, additional, Pickup, Lorinda, additional, Pieterse, Sonja, additional, Piper, Jo, additional, Pipini, Dimitra, additional, Plank, Mary, additional, Du Plessis, Joan, additional, Pollard, Samuel, additional, Pooley, Jennifer, additional, Pooran, Anil, additional, Poulton, Ian, additional, Powers, Claire, additional, Presa, Fernando B., additional, Price, David A., additional, Price, Vivien, additional, Primeira, Marcelo, additional, Proud, Pamela C., additional, Provstgaard-Morys, Samuel, additional, Pueschel, Sophie, additional, Pulido, David, additional, Quaid, Sheena, additional, Rabara, Ria, additional, Radford, Alexandra, additional, Radia, Kajal, additional, Rajapaska, Durga, additional, Rajeswaran, Thurkka, additional, Ramos, Alberto San Francisco, additional, Ramos Lopez, Fernando, additional, Rampling, Tommy, additional, Rand, Jade, additional, Ratcliffe, Helen, additional, Rawlinson, Tom, additional, Rea, David, additional, Rees, Byron, additional, Reiné, Jesús, additional, Resuello-Dauti, Mila, additional, Reyes Pabon, Emilia, additional, Ribiero, Carla M., additional, Ricamara, Marivic, additional, Richter, Alex, additional, Ritchie, Neil, additional, Ritchie, Adam J., additional, Robbins, Alexander J., additional, Roberts, Hannah, additional, Robinson, Ryan E., additional, Robinson, Hannah, additional, Rocchetti, Talita T., additional, Rocha, Beatriz Pinho, additional, Roche, Sophie, additional, Rollier, Christine, additional, Rose, Louisa, additional, Ross Russell, Amy L., additional, Rossouw, Lindie, additional, Royal, Simon, additional, Rudiansyah, Indra, additional, Ruiz, Sarah, additional, Saich, Stephen, additional, Sala, Claudia, additional, Sale, Jessica, additional, Salman, Ahmed M., additional, Salvador, Natalia, additional, Salvador, Stephannie, additional, Sampaio, Milla, additional, Samson, Annette D., additional, Sanchez-Gonzalez, Amada, additional, Sanders, Helen, additional, Sanders, Katherine, additional, Santos, Erika, additional, Santos Guerra, Mayara F.S., additional, Satti, Iman, additional, Saunders, Jack E., additional, Saunders, Caroline, additional, Sayed, Aakifah, additional, Schim van der Loeff, Ina, additional, Schmid, Annina B., additional, Schofield, Ella, additional, Screaton, Gavin, additional, Seddiqi, Samiullah, additional, Segireddy, Rameswara R., additional, Senger, Roberta, additional, Serrano, Sonia, additional, Shah, Rajiv, additional, Shaik, Imam, additional, Sharpe, Hannah E., additional, Sharrocks, Katherine, additional, Shaw, Robert, additional, Shea, Adam, additional, Shepherd, Amy, additional, Shepherd, James G., additional, Shiham, Farah, additional, Sidhom, Emad, additional, Silk, Sarah E., additional, da Silva Moraes, Antonio Carlos, additional, Silva-Junior, Gilberto, additional, Silva-Reyes, Laura, additional, Silveira, Anderson D., additional, Silveira, Mariana B.V., additional, Sinha, Jaisi, additional, Skelly, Donal T., additional, Smith, Daniel C., additional, Smith, Nick, additional, Smith, Holly E., additional, Smith, David J., additional, Smith, Catherine C., additional, Soares, Airanuédida, additional, Soares, Tiago, additional, Solórzano, Carla, additional, Sorio, Guilherme L., additional, Sorley, Kim, additional, Sosa-Rodriguez, Tiffany, additional, Souza, Cinthia M.C.D.L., additional, Souza, Bruno S.D.F., additional, Souza, Alessandra R., additional, Spencer, Alexandra J., additional, Spina, Fernanda, additional, Spoors, Louise, additional, Stafford, Lizzie, additional, Stamford, Imogen, additional, Starinskij, Igor, additional, Stein, Ricardo, additional, Steven, Jill, additional, Stockdale, Lisa, additional, Stockwell, Lisa V., additional, Strickland, Louise H., additional, Stuart, Arabella C., additional, Sturdy, Ann, additional, Sutton, Natalina, additional, Szigeti, Anna, additional, Tahiri-Alaoui, Abdessamad, additional, Tanner, Rachel, additional, Taoushanis, Carol, additional, Tarr, Alexander W., additional, Taylor, Keja, additional, Taylor, Ursula, additional, Taylor, Iona Jennifer, additional, Taylor, Justin, additional, te Water Naude, Rebecca, additional, Themistocleous, Yrene, additional, Themistocleous, Andreas, additional, Thomas, Merin, additional, Thomas, Kelly, additional, Thomas, Tonia M., additional, Thombrayil, Asha, additional, Thompson, Fawziyah, additional, Thompson, Amber, additional, Thompson, Kevin, additional, Thompson, Ameeka, additional, Thomson, Julia, additional, Thornton-Jones, Viv, additional, Tighe, Patrick J., additional, Tinoco, Lygia Accioly, additional, Tiongson, Gerlynn, additional, Tladinyane, Bonolo, additional, Tomasicchio, Michele, additional, Tomic, Adriana, additional, Tonks, Susan, additional, Towner, James, additional, Tran, Nguyen, additional, Tree, Julia, additional, Trillana, Gerry, additional, Trinham, Charlotte, additional, Trivett, Rose, additional, Truby, Adam, additional, Tsheko, Betty Lebogang, additional, Turabi, Aadil, additional, Turner, Richard, additional, Turner, Cheryl, additional, Ulaszewska, Marta, additional, Underwood, Benjamin R., additional, Varughese, Rachel, additional, Verbart, Dennis, additional, Verheul, Marije, additional, Vichos, Iason, additional, Vieira, Taiane, additional, Waddington, Claire S., additional, Walker, Laura, additional, Wallis, Erica, additional, Wand, Matthew, additional, Warbick, Deborah, additional, Wardell, Theresa, additional, Warimwe, George, additional, Warren, Sarah C., additional, Watkins, Bridget, additional, Watson, Ekaterina, additional, Webb, Stewart, additional, Webb-Bridges, Alice, additional, Webster, Angela, additional, Welch, Jessica, additional, Wells, Jeanette, additional, West, Alison, additional, White, Caroline, additional, White, Rachel, additional, Williams, Paul, additional, Williams, Rachel L., additional, Winslow, Rebecca, additional, Woodyer, Mark, additional, Worth, Andrew T., additional, Wright, Danny, additional, Wroblewska, Marzena, additional, Yao, Andy, additional, Zimmer, Rafael, additional, Zizi, Dalila, additional, and Zuidewind, Peter, additional
Published: 2021
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26. First experience of COVID-19 screening of health-care workers in England

Author: Hunter, Ewan, primary, Price, David A, additional, Murphy, Elizabeth, additional, van der Loeff, Ina Schim, additional, Baker, Kenneth F, additional, Lendrem, Dennis, additional, Lendrem, Clare, additional, Schmid, Matthias L, additional, Pareja-Cebrian, Lucia, additional, Welch, Andrew, additional, Payne, Brendan A I, additional, and Duncan, Christopher J A, additional
Published: 2020
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27. The Good Clinical Practice guideline: a bronze standard for clinical research

Author: Grimes, David A., Hubacher, David, Nanda, Kavita, Schulz, Kenneth F., Moher, David, and Altman, Douglas G.
Subjects: Practice guidelines (Medicine) -- Evaluation
Published: 2005

28. Randomised trials, human nature, and reporting guidelines

Author: Schulz, Kenneth F.
Published: 1996

29. Meta-analyses of interventional trials done in populations with different risks

Author: Schulz, Kenneth F
Published: 1995

30. WHO multicentre randomised trial of misoprostol in the management of the third stage of labour

Author: Gülmezoglu, A Metin, Villar, José, Ngoc, Nguyen Thi Nhu, Piaggio, Gilda, Carroli, Guillermo, Adetoro, Lekan, Abdel-Aleem, Hany, Cheng, Linan, Hofmeyr, G Justus, Lumbiganon, Pisake, Unger, Christian, Prendiville, Walter, Pinol, Alain, Elbourne, Diana, El-Refaey, Hazem, and Schulz, Kenneth F
Published: 2001
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31. Increasing value and reducing waste in research design, conduct, and analysis

Author: Sander Greenland, David Moher, Muin J. Khoury, Malcolm R. Macleod, Kenneth F. Schulz, Robert Tibshirani, John P. A. Ioannidis, and Mark A. Hlatky
Subjects: Research design, Value (ethics), business.industry, media_common.quotation_subject, Statistics as Topic, Novelty, Reproducibility of Results, General Medicine, Research Personnel, Article, Reward system, Documentation, Reward, Risk analysis (engineering), Research Design, Workforce, Medicine, Quality (business), business, Reliability (statistics), media_common
Abstract: Correctable weaknesses in the design, conduct, and analysis of biomedical and public health research studies can produce misleading results and waste valuable resources. Small effects can be difficult to distinguish from bias introduced by study design and analyses. An absence of detailed written protocols and poor documentation of research is common. Information obtained might not be useful or important, and statistical precision or power is often too low or used in a misleading way. Insufficient consideration might be given to both previous and continuing studies. Arbitrary choice of analyses and an overemphasis on random extremes might affect the reported findings. Several problems relate to the research workforce, including failure to involve experienced statisticians and methodologists, failure to train clinical researchers and laboratory scientists in research methods and design, and the involvement of stakeholders with conflicts of interest. Inadequate emphasis is placed on recording of research decisions and on reproducibility of research. Finally, reward systems incentivise quantity more than quality, and novelty more than reliability. We propose potential solutions for these problems, including improvements in protocols and documentation, consideration of evidence from studies in progress, standardisation of research efforts, optimisation and training of an experienced and non-conflicted scientific workforce, and reconsideration of scientific reward systems.
Published: 2014
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32. Epidemiology research

Author: Grimes, David A, Schulz, Kenneth F, Momoli, Franco, Brogly, Susan, Hagel, Brent, Kulaga, Sophie, Schuck, Peter, Kaptchuk, Ted J, Campbell, Mike, Nicholl, Jon, Shau, Wen-Yi, and Fang, Chi-Tai
Subjects: Epidemiological research -- Methods, Experimental design -- Methods
Published: 2002

33. Refining clinical diagnosis with likelihood ratios

Author: Kenneth F. Schulz and David A. Grimes
Subjects: Likelihood Functions, Pediatrics, medicine.medical_specialty, Models, Statistical, business.industry, Signs and symptoms, Diagnostic accuracy, General Medicine, Disease, Odds ratio, Likelihood ratios in diagnostic testing, Clinical diagnosis, Diagnosis, Epidemiology, Odds Ratio, Medicine, High likelihood, business
Abstract: Likelihood ratios can refine clinical diagnosis on the basis of signs and symptoms; however, they are underused for patients' care. A likelihood ratio is the percentage of ill people with a given test result divided by the percentage of well individuals with the same result. Ideally, abnormal test results should be much more typical in ill individuals than in those who are well (high likelihood ratio) and normal test results should be most frequent in well people than in sick people (low likelihood ratio). Likelihood ratios near unity have little effect on decision-making; by contrast, high or low ratios can greatly shift the clinician's estimate of the probability of disease. Likelihood ratios can be calculated not only for dichotomous (positive or negative) tests but also for tests with multiple levels of results, such as creatine kinase or ventilation-perfusion scans. When combined with an accurate clinical diagnosis, likelihood ratios from ancillary tests improve diagnostic accuracy in a synergistic manner.
Published: 2005
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34. Sample size calculations in randomised trials: mandatory and mystical

Author: Kenneth F. Schulz and David A. Grimes
Subjects: medicine.medical_specialty, business.industry, Statistics as Topic, General Medicine, Publication bias, Clinical trial, Sample size determination, Sample Size, medicine, Medical physics, Methodological quality, business, Publication, Randomized Controlled Trials as Topic
Abstract: Summary Investigators should properly calculate sample sizes before the start of their randomised trials and adequately describe the details in their published report. In these a-priori calculations, determining the effect size to detect—eg, event rates in treatment and control groups—reflects inherently subjective clinical judgments. Furthermore, these judgments greatly affect sample size calculations. We question the branding of trials as unethical on the basis of an imprecise sample size calculation process. So-called underpowered trials might be acceptable if investigators use methodological rigor to eliminate bias, properly report to avoid misinterpretation, and always publish results to avert publication bias. Some shift of emphasis from a fixation on sample size to a focus on methodological quality would yield more trials with less bias. Unbiased trials with imprecise results trump no results at all. Clinicians and patients deserve guidance now.
Published: 2005
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35. Compared to what? Finding controls for case-control studies

Author: David A. Grimes and Kenneth F. Schulz
Subjects: education.field_of_study, Sample (material), Population, Case-control study, food and beverages, Crash, General Medicine, Emergency department, Harm, Case-Control Studies, Humans, Epidemiologic Methods, education, Psychology, Control (linguistics), Neighbourhood (mathematics), Demography
Abstract: Use of control (comparison) groups is a powerful research tool. In case-control studies, controls estimate the frequency of an exposure in the population under study. Controls can be taken from known or unknown study populations. A known group consists of a defined population observed over a period, such as passengers on a cruise ship. When the study group is known, a sample of the population can be used as controls. If no population roster exists, then techniques such as random-digit dialling can be used. Sometimes, however, the study group is unknown, for example, motor-vehicle crash victims brought to an emergency department, who may come from far away. In this situation, hospital controls, neighbourhood controls, and friend, associate, or relative controls can be used. In general, one well-selected control group is better than two or more. When the number of cases is small, the ratio of controls to cases can be raised to improve the ability to find important differences. Although no ideal control group exists, readers need to think carefully about how representative the controls are. Poor choice of controls can lead to both wrong results and possible medical harm.
Published: 2005
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36. Analysis of air contrast barium enema, computed tomographic colonography, and colonoscopy: prospective comparison

Author: Henderson J, Abraham H. Dachman, Kenneth R. McQuaid, Hatten P, Erik K. Paulson, Geetanjali A. Akerkar, William M. Thompson, Burdick S, Davis W, Judy Yee, Linda L. Sanders, William Foster, R Halvorsen, M Sterling, Don C. Rockey, J Garvie, Bhutani, Arun J. Sanyal, David T. Rubin, Kenneth F. Binmoeller, Edmund J. Bini, Donna Niedzwiecki, and Hayden B. Bosworth
Subjects: Male, medicine.medical_specialty, Virtual colonoscopy, Colon, Colorectal cancer, Colonic Polyps, Colonoscopy, Enema, Sensitivity and Specificity, Computed Tomography Colonography, Humans, Medicine, Air contrast barium enema, neoplasms, Barium enema, medicine.diagnostic_test, business.industry, General Medicine, Middle Aged, medicine.disease, digestive system diseases, Colon polyps, Endoscopy, Pneumoradiography, Colonic Neoplasms, Female, Radiology, Barium Sulfate, business, Colonography, Computed Tomographic
Abstract: Summary Background The usefulness of currently available colon imaging tests, including air contrast barium enema (ACBE), computed tomographic colonography (CTC), and colonoscopy, to detect colon polyps and cancers is uncertain. We aimed to assess the sensitivity of these three imaging tests. Methods Patients with faecal occult blood, haematochezia, iron-deficiency anaemia, or a family history of colon cancer underwent three separate colon-imaging studies—ACBE, followed 7–14 days later by CTC and colonoscopy on the same day. The primary outcome was detection of colonic polyps and cancers. Outcomes were assessed by building an aggregate view of the colon, taking into account results of all three tests. Findings 614 patients completed all three imaging tests. When analysed on a per-patient basis, for lesions 10 mm or larger in size (n=63), the sensitivity of ACBE was 48% (95% CI 35–61), CTC 59% (46–71, p=0·1083 for CTC vs ACBE), and colonoscopy 98% (91–100, p vs CTC). For lesions 6–9 mm in size (n=116), sensitivity was 35% for ACBE (27–45), 51% for CTC (41–60, p=0·0080 for CTC vs ACBE), and 99% for colonoscopy (95–100, p vs CTC). For lesions of 10 mm or larger in size, the specificity was greater for colonoscopy (0·996) than for either ACBE (0·90) or CTC (0·96) and declined for ACBE and CTC when smaller lesions were considered. Interpretation Colonoscopy was more sensitive than other tests, as currently undertaken, for detection of colonic polyps and cancers. These data have important implications for diagnostic use of colon imaging tests. Published online December 17, 2004 http://image.thelancet.com/extras/04art11289web.pdf
Published: 2005
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37. The CONSORT statement: revised recommendations for improving the quality of reports of parallel-group randomised trials

Author: Moher, David, Schulz, Kenneth F, and Altman, Douglas G
Subjects: Clinical trials -- Reports, Report writing -- Standards
Published: 2001

38. Sample size slippages in randomised trials: exclusions and the lost and wayward

Author: Kenneth F. Schulz and David A. Grimes
Subjects: medicine.medical_specialty, Patient Dropouts, media_common.quotation_subject, Sample (material), Appeal, MEDLINE, Treatment comparison, General Medicine, Commit, Clinical trial, Bias, Sample size determination, Sample Size, Outcome Assessment, Health Care, medicine, Humans, Psychiatry, Psychology, Seriousness, Follow-Up Studies, Randomized Controlled Trials as Topic, media_common
Abstract: Summary Proper randomisation means little if investigators cannot include all randomised participants in the primary analysis. Participants might ignore follow-up, leave town, or take aspartame when instructed to take aspirin. Exclusions before randomisation do not bias the treatment comparison, but they can hurt generalisability. Eligibility criteria for a trial should be clear, specific, and applied before randomisation. Readers should assess whether any of the criteria make the trial sample atypical or unrepresentative of the people in which they are interested. In principle, assessment of exclusions after randomisation is simple: none are allowed. For the primary analysis, all participants enrolled should be included and analysed as part of the original group assigned (an intent-to-treat analysis). In reality, however, losses frequently occur. Investigators should, therefore, commit adequate resources to develop and implement procedures to maximise retention of participants. Moreover, researchers should provide clear, explicit information on the progress of all randomised participants through the trial by use of, for instance, a trial profile. Investigators can also do secondary analyses on, for instance, per-protocol or as-treated participants. Such analyses should be described as secondary and non-randomised comparisons. Mishandling of exclusions causes serious methodological difficulties. Unfortunately, some explanations for mishandling exclusions intuitively appeal to readers, disguising the seriousness of the issues. Creative mismanagement of exclusions can undermine trial validity.
Published: 2002
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39. Case-control studies: research in reverse

Author: Kenneth F. Schulz and David A. Grimes
Subjects: medicine.medical_specialty, education.field_of_study, Recall, business.industry, Clinical study design, Control (management), Confounding, Population, Case-control study, General Medicine, Epidemiology, Selection (linguistics), Medicine, business, education, Cognitive psychology
Abstract: Summary Epidemiologists benefit greatly from having case-control study designs in their research armamentarium. Case-control studies can yield important scientific findings with relatively little time, money, and effort compared with other study designs. This seemingly quick road to research results entices many newly trained epidemiologists. Indeed, investigators implement case-control studies more frequently than any other analytical epidemiological study. Unfortunately, case-control designs also tend to be more susceptible to biases than other comparative studies. Although easier to do, they are also easier to do wrong. Five main notions guide investigators who do, or readers who assess, case-control studies. First, investigators must explicitly define the criteria for diagnosis of a case and any eligibility criteria used for selection. Second, controls should come from the same population as the cases, and their selection should be independent of the exposures of interest. Third, investigators should blind the data gatherers to the case or control status of participants or, if impossible, at least blind them to the main hypothesis of the study. Fourth, data gatherers need to be thoroughly trained to elicit exposure in a similar manner from cases and controls; they should use memory aids to facilitate and balance recall between cases and controls. Finally, investigators should address confounding in case-control studies, either in the design stage or with analytical techniques. Devotion of meticulous attention to these points enhances the validity of the results and bolsters the reader's confidence in the findings.
Published: 2002
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40. Generation of allocation sequences in randomised trials: chance, not choice

Author: David A. Grimes and Kenneth F. Schulz
Subjects: Random allocation, Actuarial science, Randomization, Epidemiology, Computer science, General Medicine, law.invention, Clinical trial, Random Allocation, Randomized controlled trial, law, Sample size determination, Credibility, Humans, Selection (genetic algorithm), Randomized Controlled Trials as Topic
Abstract: Summary The randomised controlled trial sets the gold standard of clinical research. However, randomisation persists as perhaps the least-understood aspect of a trial. Moreover, anything short of proper randomisation courts selection and confounding biases. Researchers should spurn all systematic, non-random methods of allocation. Trial participants should be assigned to comparison groups based on a random process. Simple (unrestricted) randomisation, analogous to repeated fair coin-tossing, is the most basic of sequence generation approaches. Furthermore, no other approach, irrespective of its complexity and sophistication, surpasses simple randomisation for prevention of bias. Investigators should, therefore, use this method more often than they do, and readers should expect and accept disparities in group sizes. Several other complicated restricted randomisation procedures limit the likelihood of undesirable sample size imbalances in the intervention groups. The most frequently used restricted sequence generation procedure is blocked randomisation. If this method is used, investigators should randomly vary the block sizes and use larger block sizes, particularly in an unblinded trial. Other restricted procedures, such as urn randomisation, combine beneficial attributes of simple and restricted randomisation by preserving most of the unpredictability while achieving some balance. The effectiveness of stratified randomisation depends on use of a restricted randomisation approach to balance the allocation sequences for each stratum. Generation of a proper randomisation sequence takes little time and effort but affords big rewards in scientific accuracy and credibility. Investigators should devote appropriate resources to the generation of properly randomised trials and reporting their methods clearly.
Published: 2002
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41. Randomised trials, human nature, and reporting guidelines

Author: Kenneth F. Schulz
Subjects: Publishing, Quality Control, medicine.medical_specialty, Randomization, Research Subjects, business.industry, Patient Selection, Public health, MEDLINE, Guidelines as Topic, General Medicine, Empirical Research, Control Groups, Empirical research, Bias, Family medicine, Humans, Medicine, business, Editorial Policies, Randomized Controlled Trials as Topic
Published: 1996
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42. CONSORT 2010 changes and testing blindness in RCTs

Author: Schulz, Kenneth F, Altman, Douglas G, Moher, David, and Fergusson, Dean
Published: 2010
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43. CONSORT 2010

Author: David Moher, Kenneth F. Schulz, and Douglas G. Altman
Subjects: business.industry, Medicine, General Medicine, business
Published: 2010
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44. CONSORT for reporting randomised trials in journal and conference abstracts

Author: Hopewell, Sally, Clarke, Mike, Moher, David, Wager, Elizabeth, Middleton, Philippa, Altman, Douglas G, and Schulz, Kenneth F
Published: 2008
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45. CONSORT 2010

Author: Schulz, Kenneth F, primary, Moher, David, additional, and Altman, Douglas G, additional
Published: 2010
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46. Protocols, probity, and publication

Author: Schulz, Kenneth F, primary, Altman, Douglas G, additional, and Moher, David, additional
Published: 2009
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