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1. Model-Agnostic Hybrid Numerical Weather Prediction and Machine Learning Paradigm for Solar Forecasting in the Tropics

Author

Ng, Nigel Yuan Yun, Gopalan, Harish, Raghavan, Venugopalan S. G., and Ooi, Chin Chun

Subjects
Computer Science - Machine Learning, Physics - Atmospheric and Oceanic Physics
Abstract

Numerical weather prediction (NWP) and machine learning (ML) methods are popular for solar forecasting. However, NWP models have multiple possible physical parameterizations, which requires site-specific NWP optimization. This is further complicated when regional NWP models are used with global climate models with different possible parameterizations. In this study, an alternative approach is proposed and evaluated for four radiation models. Weather Research and Forecasting (WRF) model is run in both global and regional mode to provide an estimate for solar irradiance. This estimate is then post-processed using ML to provide a final prediction. Normalized root-mean-square error from WRF is reduced by up to 40-50% with this ML error correction model. Results obtained using CAM, GFDL, New Goddard and RRTMG radiation models were comparable after this correction, negating the need for WRF parameterization tuning. Other models incorporating nearby locations and sensor data are also evaluated, with the latter being particularly promising.

Published
2021

6. IMPACT-Global Hip Fracture Audit: Nosocomial infection, risk prediction and prognostication, minimum reporting standards and global collaborative audit. Lessons from an international multicentre study of 7,090 patients conducted in 14 nations during the COVID-19 pandemic

Author

Hall, A, Clement, N, Ojeda-Thies, C, Maclullich, A, Toro, G, Johansen, A, White, T, Duckworth, A, Abdul-Jabar, H, Abu-Rajab, R, Abugarja, A, Adam, K, Aguado Hernández, H, Améstica Lazcano, G, Anderson, S, Ansar, M, Antrobus, J, Aragón Achig, E, Archunan, M, Arrieta Salinas, M, Ashford-Wilson, S, Assens Gibert, C, Athanasopoulou, K, Awadelkarim, M, Baird, S, Bajada, S, Balakrishnan, S, Balasubramanian, S, Ballantyne, J, Bárcena Goitiandia, L, Barkham, B, Barmpagianni, C, Barres-Carsi, M, Barrett, S, Baskaran, D, Bell, J, Bell, K, Bell, S, Bellelli, G, Benchimol, J, Boietti, B, Boswell, S, Braile, A, Brennan, C, Brent, L, Brooke, B, Bruno, G, Burahee, A, Burns, S, Calabrò, G, Campbell, L, Carabelli, G, Carnegie, C, Carretero Cristobal, G, Caruana, E, Cassinello Ogea, M, Castellanos Robles, J, Castillon, P, Chakrabarti, A, Cecere, A, Chen, P, Clarke, J, Collins, G, Corrales Cardenal, J, Corsi, M, Cózar Adelantado, G, Craxford, S, Crooks, M, Cuarental-García, J, Cuthbert, R, Dall, G, Daskalakis, I, De Cicco, A, Diana, D, Demaria, P, Dereix, J, Díaz Jiménez, J, Dinamarca Montecinos, J, Do Le, H, Donoso Coppa, J, Drosos, G, Duffy, A, East, J, Eastwood, D, Elbahari, H, Elias de Molins Peña, C, Elmamoun, M, Emmerson, B, Escobar Sánchez, D, Faimali, M, Farré-Mercadé, M, Farrow, L, Fayez, A, Fell, A, Fenner, C, Ferguson, D, Finlayson, L, Flores Gómez, A, Freeman, N, French, J, Gabardo Calvo, S, Gagliardo, N, Garcia Albiñana, J, García Cruz, G, García de Cortázar Antolín, U, García Virto, V, Gealy, S, Gil Caballero, S, Gill, M, González González, M, Gopireddy, R, Guntley, D, Gurung, B, Guzmán Rosales, G, Haddad, N, Hafeez, M, Haller, P, Halligan, E, Hardie, J, Hawker, I, Helal, A, Herrera Cruz, M, Herreros Ruiz-Valdepeñas, R, Horton, J, Howells, S, Howieson, A, Hughes, L, Hünicken Torrez, F, Hurtado Ortega, A, Huxley, P, Hamid, H, Ilahi, N, Iliadis, A, Inman, D, Jadhao, P, Jandoo, R, Jawad, L, Jayatilaka, M, Jenkins, P, Jeyapalan, R, Johnson, D, Johnston, A, Joseph, S, Kapoor, S, Karagiannidis, G, Karanam, K, Kattakayam, F, Konarski, A, Kontakis, G, Labrador Hernández, G, Lancaster, V, Landi, G, Le, B, Liew, I, Logishetty, K, Lopez Marquez, A, Lopez, J, Lum, J, Macpherson, G, Madan, S, Mahroof, S, Malik-Tabassum, K, Mallina, R, Maqsood, A, Marson, B, Martin Legorburo, M, Martin-Perez, E, Martínez Jiménez, T, Martinez Martin, J, Mayne, A, Mayor, A, Mcalinden, G, Mclean, L, Mcdonald, L, Mcintyre, J, Mckay, P, Mckean, G, Mcshane, H, Medici, A, Meeke, C, Meldrum, E, Mendez, M, Mercer, S, Merino Perez, J, Mesa-Lampré, M, Mighton, S, Milne, K, Mohamed Yaseen, M, Moppett, I, Mora, J, Morales-Zumel, S, Moreno Fenoll, I, Mousa, A, Murray, A, Murray, E, Nair, R, Neary, F, Negri, G, Negus, O, Newham-Harvey, F, Ng, N, Nightingale, J, Noor Mohamed Anver, S, Nunag, P, O'Hare, M, Ollivere, B, Ortés Gómez, R, Owens, A, Page, S, Palloni, V, Panagiotopoulos, A, Panagiotopoulos, E, Panesar, P, Papadopoulos, A, Spyridon, P, Pareja Sierra, T, Park, C, Parwaiz, H, Paterson-Byrne, P, Patton, S, Pearce, J, Porter, M, Pellegrino, A, Pèrez Cuellar, A, Pezzella, R, Phadnis, A, Pinder, C, Piper, D, Powell-Bowns, M, Prieto Martín, R, Probert, A, Ramesh, A, Ramírez de Arellano, M, Renton, D, Rickman, S, Robertson, A, Roche Albero, A, Rodrigo Verguizas, J, Rodríguez Couso, M, Rooney, J, Sáez-López, P, Saldaña-Díaz, A, Santulli, A, Sanz Pérez, M, Sarraf, K, Scarsbrook, C, Scott, C, Scott, J, Shah, S, Sharaf, S, Sharma, S, Shirley, D, Siano, A, Simpson, J, Singh, A, Sinnett, T, Sisodia, G, Smith, P, Sophena Bert, E, Steel, M, Stewart, A, Stewart, C, Sugand, K, Sullivan, N, Sweeting, L, Symes, M, Tan, D, Tancredi, F, Tatani, I, Thomas, P, Thomson, F, Toner, N, Tong, A, Toro, A, Tosounidis, T, Tottas, S, Trinidad Leo, A, Tucker, D, Vemulapalli, K, Ventura Garces, D, Vernon, O, Viveros Garcia, J, Ward, A, Ward, K, Watson, K, Weerasuriya, T, Wickramanayake, U, Wilkinson, H, Windley, J, Wood, J, Wynell-Mayow, W, Zatti, G, Zeiton, M, Zurrón Lobato, M, Hall, Andrew J., Clement, Nicholas D., Ojeda-Thies, Cristina, MacLullich, Alasdair MJ., Toro, Giuseppe, Johansen, Antony, White, Tim O., Duckworth, Andrew D., Abdul-Jabar, Hani, Abu-Rajab, Rashid, Abugarja, Ahmed, Adam, Karen, Aguado Hernández, Héctor J., Améstica Lazcano, Gedeón, Anderson, Sarah, Ansar, Mahmood, Antrobus, Jonathan, Aragón Achig, Esteban Javier, Archunan, Maheswaran, Arrieta Salinas, Mirentxu, Ashford-Wilson, Sarah, Assens Gibert, Cristina, Athanasopoulou, Katerina, Awadelkarim, Mohamed, Baird, Stuart, Bajada, Stefan, Balakrishnan, Shobana, Balasubramanian, Sathishkumar, Ballantyne, James A., Bárcena Goitiandia, Leopoldo, Barkham, Benjamin, Barmpagianni, Christina, Barres-Carsi, Mariano, Barrett, Sarah, Baskaran, Dinnish, Bell, Jean, Bell, Katrina, Bell, Stuart, Bellelli, Giuseppe, Benchimol, Javier Alberto, Boietti, Bruno Rafael, Boswell, Sally, Braile, Adriano, Brennan, Caitlin, Brent, Louise, Brooke, Ben, Bruno, Gaetano, Burahee, Abdus, Burns, Shirley, Calabrò, Giampiero, Campbell, Lucy, Carabelli, Guido Sebastian, Carnegie, Carol, Carretero Cristobal, Guillermo, Caruana, Ethan, Cassinello Ogea, M. a Concepción, Castellanos Robles, Juan, Castillon, Pablo, Chakrabarti, Anil, Cecere, Antonio Benedetto, Chen, Ping, Clarke, Jon V., Collins, Grace, Corrales Cardenal, Jorge E., Corsi, Maurizio, Cózar Adelantado, Gara María, Craxford, Simon, Crooks, Melissa, Cuarental-García, Javier, Cuthbert, Rory, Dall, Graham, Daskalakis, Ioannis, De Cicco, Annalisa, Diana, de la Fuente de Dios, Demaria, Pablo, Dereix, John, Díaz Jiménez, Julian, Dinamarca Montecinos, José Luis, Do Le, Ha Phuong, Donoso Coppa, Juan Pablo, Drosos, Georgios, Duffy, Andrew, East, Jamie, Eastwood, Deborah, Elbahari, Hassan, Elias de Molins Peña, Carmen, Elmamoun, Mamoun, Emmerson, Ben, Escobar Sánchez, Daniel, Faimali, Martina, Farré-Mercadé, Maria Victòria, Farrow, Luke, Fayez, Almari, Fell, Adam, Fenner, Christopher, Ferguson, David, Finlayson, Louise, Flores Gómez, Aldo, Freeman, Nicholas, French, Jonathan, Gabardo Calvo, Santiago, Gagliardo, Nicola, Garcia Albiñana, Joan, García Cruz, Guillermo, García de Cortázar Antolín, Unai, García Virto, Virginia, Gealy, Sophie, Gil Caballero, Sandra Marcela, Gill, Moneet, González González, María Soledad, Gopireddy, Rajesh, Guntley, Diane, Gurung, Binay, Guzmán Rosales, Guadalupe, Haddad, Nedaa, Hafeez, Mahum, Haller, Petra, Halligan, Emer, Hardie, John, Hawker, Imogen, Helal, Amr, Herrera Cruz, Mariana, Herreros Ruiz-Valdepeñas, Ruben, Horton, James, Howells, Sean, Howieson, Alan, Hughes, Luke, Hünicken Torrez, Flavia Lorena, Hurtado Ortega, Ana, Huxley, Peter, Hamid, Hytham K. S., Ilahi, Nida, Iliadis, Alexis, Inman, Dominic, Jadhao, Piyush, Jandoo, Rajan, Jawad, Lucy, Jayatilaka, Malwattage Lara Tania, Jenkins, Paul J., Jeyapalan, Rathan, Johnson, David, Johnston, Andrew, Joseph, Sarah, Kapoor, Siddhant, Karagiannidis, Georgios, Karanam, Krishna Saga, Kattakayam, Freddy, Konarski, Alastair, Kontakis, Georgios, Labrador Hernández, Gregorio, Lancaster, Victoria, Landi, Giovanni, Le, Brian, Liew, Ignatius, Logishetty, Kartik, Lopez Marquez, Andrew Carlomaria Daniel, Lopez, Judit, Lum, Joann, Macpherson, Gavin J., Madan, Suvira, Mahroof, Sabreena, Malik-Tabassum, Khalid, Mallina, Ravi, Maqsood, Afnan, Marson, Ben, Martin Legorburo, M José, Martin-Perez, Encarna, Martínez Jiménez, Tania, Martinez Martin, Javier, Mayne, Alistair, Mayor, Amy, McAlinden, Gavan, McLean, Lucille, McDonald, Lorna, McIntyre, Joshua, McKay, Pamela, McKean, Greg, McShane, Heather, Medici, Antonio, Meeke, Chelsea, Meldrum, Evonne, Mendez, Mijail, Mercer, Scott, Merino Perez, Josu, Mesa-Lampré, María-Pilar, Mighton, Shuna, Milne, Kirsty, Mohamed Yaseen, Muhammed, Moppett, Iain, Mora, Jesus, Morales-Zumel, Sira, Moreno Fenoll, Irene Blanca, Mousa, Adham, Murray, Alastair W., Murray, Elspeth V., Nair, Radhika, Neary, Fiona, Negri, Giacomo, Negus, Oliver, Newham-Harvey, Fiona, Ng, Nigel, Nightingale, Jess, Noor Mohamed Anver, Sumiya, Nunag, Perrico, O'Hare, Matthew, Ollivere, Ben, Ortés Gómez, Raquel, Owens, AnneMarie, Page, Siobhan, Palloni, Valentina, Panagiotopoulos, Andreas, Panagiotopoulos, Elias, Panesar, Paul, Papadopoulos, Antonios, Spyridon, Papagiannis, Pareja Sierra, Teresa, Park, Chang, Parwaiz, Hammad, Paterson-Byrne, Paul, Patton, Sam, Pearce, Jack, Porter, Marina, Pellegrino, Achille, Pèrez Cuellar, Arturo, Pezzella, Raffaele, Phadnis, Ashish, Pinder, Charlotte, Piper, Danielle, Powell-Bowns, Matilda, Prieto Martín, Rocío, Probert, Annabel, Ramesh, Ashwanth, Ramírez de Arellano, Manuel Vicente Mejía, Renton, Duncan, Rickman, Stephen, Robertson, Alastair, Roche Albero, Adrian, Rodrigo Verguizas, José Alberto, Rodríguez Couso, Myriam, Rooney, Joanna, Sáez-López, Pilar, Saldaña-Díaz, Andres, Santulli, Adriano, Sanz Pérez, Marta Isabel, Sarraf, Khaled M., Scarsbrook, Christine, Scott, Chloe E. H., Scott, Jennifer, Shah, Sachi, Sharaf, Sharief, Sharma, Sidharth, Shirley, Denise, Siano, Antonio, Simpson, James, Singh, Abhinav, Singh, Amit, Sinnett, Tim, Sisodia, Gurudatt, Smith, Philomena, Sophena Bert, Eugenia, Steel, Michael, Stewart, Avril, Stewart, Claire, Sugand, Kapil, Sullivan, Niall, Sweeting, Lauren, Symes, Michael, Tan, Dylan Jun Hao, Tancredi, Francesco, Tatani, Irini, Thomas, Philip, Thomson, Fraser, Toner, Niamh S., Tong, Anna, Toro, Antonio, Tosounidis, Theodoros, Tottas, Stylianos, Trinidad Leo, Andrea, Tucker, Damien, Vemulapalli, Krishna, Ventura Garces, Diego, Vernon, Olivia Katherine, Viveros Garcia, Juan Carlos, Ward, Alex, Ward, Kirsty, Watson, Kate, Weerasuriya, Thisara, Wickramanayake, Udara, Wilkinson, Hannah, Windley, Joseph, Wood, Janet, Wynell-Mayow, William, Zatti, Giovanni, Zeiton, Moez, Zurrón Lobato, Miriam, Hall, A, Clement, N, Ojeda-Thies, C, Maclullich, A, Toro, G, Johansen, A, White, T, Duckworth, A, Abdul-Jabar, H, Abu-Rajab, R, Abugarja, A, Adam, K, Aguado Hernández, H, Améstica Lazcano, G, Anderson, S, Ansar, M, Antrobus, J, Aragón Achig, E, Archunan, M, Arrieta Salinas, M, Ashford-Wilson, S, Assens Gibert, C, Athanasopoulou, K, Awadelkarim, M, Baird, S, Bajada, S, Balakrishnan, S, Balasubramanian, S, Ballantyne, J, Bárcena Goitiandia, L, Barkham, B, Barmpagianni, C, Barres-Carsi, M, Barrett, S, Baskaran, D, Bell, J, Bell, K, Bell, S, Bellelli, G, Benchimol, J, Boietti, B, Boswell, S, Braile, A, Brennan, C, Brent, L, Brooke, B, Bruno, G, Burahee, A, Burns, S, Calabrò, G, Campbell, L, Carabelli, G, Carnegie, C, Carretero Cristobal, G, Caruana, E, Cassinello Ogea, M, Castellanos Robles, J, Castillon, P, Chakrabarti, A, Cecere, A, Chen, P, Clarke, J, Collins, G, Corrales Cardenal, J, Corsi, M, Cózar Adelantado, G, Craxford, S, Crooks, M, Cuarental-García, J, Cuthbert, R, Dall, G, Daskalakis, I, De Cicco, A, Diana, D, Demaria, P, Dereix, J, Díaz Jiménez, J, Dinamarca Montecinos, J, Do Le, H, Donoso Coppa, J, Drosos, G, Duffy, A, East, J, Eastwood, D, Elbahari, H, Elias de Molins Peña, C, Elmamoun, M, Emmerson, B, Escobar Sánchez, D, Faimali, M, Farré-Mercadé, M, Farrow, L, Fayez, A, Fell, A, Fenner, C, Ferguson, D, Finlayson, L, Flores Gómez, A, Freeman, N, French, J, Gabardo Calvo, S, Gagliardo, N, Garcia Albiñana, J, García Cruz, G, García de Cortázar Antolín, U, García Virto, V, Gealy, S, Gil Caballero, S, Gill, M, González González, M, Gopireddy, R, Guntley, D, Gurung, B, Guzmán Rosales, G, Haddad, N, Hafeez, M, Haller, P, Halligan, E, Hardie, J, Hawker, I, Helal, A, Herrera Cruz, M, Herreros Ruiz-Valdepeñas, R, Horton, J, Howells, S, Howieson, A, Hughes, L, Hünicken Torrez, F, Hurtado Ortega, A, Huxley, P, Hamid, H, Ilahi, N, Iliadis, A, Inman, D, Jadhao, P, Jandoo, R, Jawad, L, Jayatilaka, M, Jenkins, P, Jeyapalan, R, Johnson, D, Johnston, A, Joseph, S, Kapoor, S, Karagiannidis, G, Karanam, K, Kattakayam, F, Konarski, A, Kontakis, G, Labrador Hernández, G, Lancaster, V, Landi, G, Le, B, Liew, I, Logishetty, K, Lopez Marquez, A, Lopez, J, Lum, J, Macpherson, G, Madan, S, Mahroof, S, Malik-Tabassum, K, Mallina, R, Maqsood, A, Marson, B, Martin Legorburo, M, Martin-Perez, E, Martínez Jiménez, T, Martinez Martin, J, Mayne, A, Mayor, A, Mcalinden, G, Mclean, L, Mcdonald, L, Mcintyre, J, Mckay, P, Mckean, G, Mcshane, H, Medici, A, Meeke, C, Meldrum, E, Mendez, M, Mercer, S, Merino Perez, J, Mesa-Lampré, M, Mighton, S, Milne, K, Mohamed Yaseen, M, Moppett, I, Mora, J, Morales-Zumel, S, Moreno Fenoll, I, Mousa, A, Murray, A, Murray, E, Nair, R, Neary, F, Negri, G, Negus, O, Newham-Harvey, F, Ng, N, Nightingale, J, Noor Mohamed Anver, S, Nunag, P, O'Hare, M, Ollivere, B, Ortés Gómez, R, Owens, A, Page, S, Palloni, V, Panagiotopoulos, A, Panagiotopoulos, E, Panesar, P, Papadopoulos, A, Spyridon, P, Pareja Sierra, T, Park, C, Parwaiz, H, Paterson-Byrne, P, Patton, S, Pearce, J, Porter, M, Pellegrino, A, Pèrez Cuellar, A, Pezzella, R, Phadnis, A, Pinder, C, Piper, D, Powell-Bowns, M, Prieto Martín, R, Probert, A, Ramesh, A, Ramírez de Arellano, M, Renton, D, Rickman, S, Robertson, A, Roche Albero, A, Rodrigo Verguizas, J, Rodríguez Couso, M, Rooney, J, Sáez-López, P, Saldaña-Díaz, A, Santulli, A, Sanz Pérez, M, Sarraf, K, Scarsbrook, C, Scott, C, Scott, J, Shah, S, Sharaf, S, Sharma, S, Shirley, D, Siano, A, Simpson, J, Singh, A, Sinnett, T, Sisodia, G, Smith, P, Sophena Bert, E, Steel, M, Stewart, A, Stewart, C, Sugand, K, Sullivan, N, Sweeting, L, Symes, M, Tan, D, Tancredi, F, Tatani, I, Thomas, P, Thomson, F, Toner, N, Tong, A, Toro, A, Tosounidis, T, Tottas, S, Trinidad Leo, A, Tucker, D, Vemulapalli, K, Ventura Garces, D, Vernon, O, Viveros Garcia, J, Ward, A, Ward, K, Watson, K, Weerasuriya, T, Wickramanayake, U, Wilkinson, H, Windley, J, Wood, J, Wynell-Mayow, W, Zatti, G, Zeiton, M, Zurrón Lobato, M, Hall, Andrew J., Clement, Nicholas D., Ojeda-Thies, Cristina, MacLullich, Alasdair MJ., Toro, Giuseppe, Johansen, Antony, White, Tim O., Duckworth, Andrew D., Abdul-Jabar, Hani, Abu-Rajab, Rashid, Abugarja, Ahmed, Adam, Karen, Aguado Hernández, Héctor J., Améstica Lazcano, Gedeón, Anderson, Sarah, Ansar, Mahmood, Antrobus, Jonathan, Aragón Achig, Esteban Javier, Archunan, Maheswaran, Arrieta Salinas, Mirentxu, Ashford-Wilson, Sarah, Assens Gibert, Cristina, Athanasopoulou, Katerina, Awadelkarim, Mohamed, Baird, Stuart, Bajada, Stefan, Balakrishnan, Shobana, Balasubramanian, Sathishkumar, Ballantyne, James A., Bárcena Goitiandia, Leopoldo, Barkham, Benjamin, Barmpagianni, Christina, Barres-Carsi, Mariano, Barrett, Sarah, Baskaran, Dinnish, Bell, Jean, Bell, Katrina, Bell, Stuart, Bellelli, Giuseppe, Benchimol, Javier Alberto, Boietti, Bruno Rafael, Boswell, Sally, Braile, Adriano, Brennan, Caitlin, Brent, Louise, Brooke, Ben, Bruno, Gaetano, Burahee, Abdus, Burns, Shirley, Calabrò, Giampiero, Campbell, Lucy, Carabelli, Guido Sebastian, Carnegie, Carol, Carretero Cristobal, Guillermo, Caruana, Ethan, Cassinello Ogea, M. a Concepción, Castellanos Robles, Juan, Castillon, Pablo, Chakrabarti, Anil, Cecere, Antonio Benedetto, Chen, Ping, Clarke, Jon V., Collins, Grace, Corrales Cardenal, Jorge E., Corsi, Maurizio, Cózar Adelantado, Gara María, Craxford, Simon, Crooks, Melissa, Cuarental-García, Javier, Cuthbert, Rory, Dall, Graham, Daskalakis, Ioannis, De Cicco, Annalisa, Diana, de la Fuente de Dios, Demaria, Pablo, Dereix, John, Díaz Jiménez, Julian, Dinamarca Montecinos, José Luis, Do Le, Ha Phuong, Donoso Coppa, Juan Pablo, Drosos, Georgios, Duffy, Andrew, East, Jamie, Eastwood, Deborah, Elbahari, Hassan, Elias de Molins Peña, Carmen, Elmamoun, Mamoun, Emmerson, Ben, Escobar Sánchez, Daniel, Faimali, Martina, Farré-Mercadé, Maria Victòria, Farrow, Luke, Fayez, Almari, Fell, Adam, Fenner, Christopher, Ferguson, David, Finlayson, Louise, Flores Gómez, Aldo, Freeman, Nicholas, French, Jonathan, Gabardo Calvo, Santiago, Gagliardo, Nicola, Garcia Albiñana, Joan, García Cruz, Guillermo, García de Cortázar Antolín, Unai, García Virto, Virginia, Gealy, Sophie, Gil Caballero, Sandra Marcela, Gill, Moneet, González González, María Soledad, Gopireddy, Rajesh, Guntley, Diane, Gurung, Binay, Guzmán Rosales, Guadalupe, Haddad, Nedaa, Hafeez, Mahum, Haller, Petra, Halligan, Emer, Hardie, John, Hawker, Imogen, Helal, Amr, Herrera Cruz, Mariana, Herreros Ruiz-Valdepeñas, Ruben, Horton, James, Howells, Sean, Howieson, Alan, Hughes, Luke, Hünicken Torrez, Flavia Lorena, Hurtado Ortega, Ana, Huxley, Peter, Hamid, Hytham K. S., Ilahi, Nida, Iliadis, Alexis, Inman, Dominic, Jadhao, Piyush, Jandoo, Rajan, Jawad, Lucy, Jayatilaka, Malwattage Lara Tania, Jenkins, Paul J., Jeyapalan, Rathan, Johnson, David, Johnston, Andrew, Joseph, Sarah, Kapoor, Siddhant, Karagiannidis, Georgios, Karanam, Krishna Saga, Kattakayam, Freddy, Konarski, Alastair, Kontakis, Georgios, Labrador Hernández, Gregorio, Lancaster, Victoria, Landi, Giovanni, Le, Brian, Liew, Ignatius, Logishetty, Kartik, Lopez Marquez, Andrew Carlomaria Daniel, Lopez, Judit, Lum, Joann, Macpherson, Gavin J., Madan, Suvira, Mahroof, Sabreena, Malik-Tabassum, Khalid, Mallina, Ravi, Maqsood, Afnan, Marson, Ben, Martin Legorburo, M José, Martin-Perez, Encarna, Martínez Jiménez, Tania, Martinez Martin, Javier, Mayne, Alistair, Mayor, Amy, McAlinden, Gavan, McLean, Lucille, McDonald, Lorna, McIntyre, Joshua, McKay, Pamela, McKean, Greg, McShane, Heather, Medici, Antonio, Meeke, Chelsea, Meldrum, Evonne, Mendez, Mijail, Mercer, Scott, Merino Perez, Josu, Mesa-Lampré, María-Pilar, Mighton, Shuna, Milne, Kirsty, Mohamed Yaseen, Muhammed, Moppett, Iain, Mora, Jesus, Morales-Zumel, Sira, Moreno Fenoll, Irene Blanca, Mousa, Adham, Murray, Alastair W., Murray, Elspeth V., Nair, Radhika, Neary, Fiona, Negri, Giacomo, Negus, Oliver, Newham-Harvey, Fiona, Ng, Nigel, Nightingale, Jess, Noor Mohamed Anver, Sumiya, Nunag, Perrico, O'Hare, Matthew, Ollivere, Ben, Ortés Gómez, Raquel, Owens, AnneMarie, Page, Siobhan, Palloni, Valentina, Panagiotopoulos, Andreas, Panagiotopoulos, Elias, Panesar, Paul, Papadopoulos, Antonios, Spyridon, Papagiannis, Pareja Sierra, Teresa, Park, Chang, Parwaiz, Hammad, Paterson-Byrne, Paul, Patton, Sam, Pearce, Jack, Porter, Marina, Pellegrino, Achille, Pèrez Cuellar, Arturo, Pezzella, Raffaele, Phadnis, Ashish, Pinder, Charlotte, Piper, Danielle, Powell-Bowns, Matilda, Prieto Martín, Rocío, Probert, Annabel, Ramesh, Ashwanth, Ramírez de Arellano, Manuel Vicente Mejía, Renton, Duncan, Rickman, Stephen, Robertson, Alastair, Roche Albero, Adrian, Rodrigo Verguizas, José Alberto, Rodríguez Couso, Myriam, Rooney, Joanna, Sáez-López, Pilar, Saldaña-Díaz, Andres, Santulli, Adriano, Sanz Pérez, Marta Isabel, Sarraf, Khaled M., Scarsbrook, Christine, Scott, Chloe E. H., Scott, Jennifer, Shah, Sachi, Sharaf, Sharief, Sharma, Sidharth, Shirley, Denise, Siano, Antonio, Simpson, James, Singh, Abhinav, Singh, Amit, Sinnett, Tim, Sisodia, Gurudatt, Smith, Philomena, Sophena Bert, Eugenia, Steel, Michael, Stewart, Avril, Stewart, Claire, Sugand, Kapil, Sullivan, Niall, Sweeting, Lauren, Symes, Michael, Tan, Dylan Jun Hao, Tancredi, Francesco, Tatani, Irini, Thomas, Philip, Thomson, Fraser, Toner, Niamh S., Tong, Anna, Toro, Antonio, Tosounidis, Theodoros, Tottas, Stylianos, Trinidad Leo, Andrea, Tucker, Damien, Vemulapalli, Krishna, Ventura Garces, Diego, Vernon, Olivia Katherine, Viveros Garcia, Juan Carlos, Ward, Alex, Ward, Kirsty, Watson, Kate, Weerasuriya, Thisara, Wickramanayake, Udara, Wilkinson, Hannah, Windley, Joseph, Wood, Janet, Wynell-Mayow, William, Zatti, Giovanni, Zeiton, Moez, and Zurrón Lobato, Miriam

Abstract

Aims: This international study aimed to assess: 1) the prevalence of preoperative and postoperative COVID-19 among patients with hip fracture, 2) the effect on 30-day mortality, and 3) clinical factors associated with the infection and with mortality in COVID-19-positive patients. Methods: A multicentre collaboration among 112 centres in 14 countries collected data on all patients presenting with a hip fracture between 1st March-31st May 2020. Demographics, residence, place of injury, presentation blood tests, Nottingham Hip Fracture Score, time to surgery, management, ASA grade, length of stay, COVID-19 and 30-day mortality status were recorded. Results: A total of 7090 patients were included, with a mean age of 82.2 (range 50–104) years and 4959 (69.9%) being female. Of 651 (9.2%) patients diagnosed with COVID-19, 225 (34.6%) were positive at presentation and 426 (65.4%) were positive postoperatively. Positive COVID-19 status was independently associated with male sex (odds ratio (OR) 1.38, p = 0.001), residential care (OR 2.15, p < 0.001), inpatient fall (OR 2.23, p = 0.003), cancer (OR 0.63, p = 0.009), ASA grades 4 (OR 1.59, p = 0.008) or 5 (OR 8.28, p < 0.001), and longer admission (OR 1.06 for each increasing day, p < 0.001). Patients with COVID-19 at any time had a significantly lower chance of 30-day survival versus those without COVID-19 (72.7% versus 92.6%, p < 0.001). COVID-19 was independently associated with an increased 30-day mortality risk (hazard ratio (HR) 2.83, p < 0.001). Increasing age (HR 1.03, p = 0.028), male sex (HR 2.35, p < 0.001), renal disease (HR 1.53, p = 0.017), and pulmonary disease (HR 1.45, p = 0.039) were independently associated with a higher 30-day mortality risk in patients with COVID-19 when adjusting for confounders. Conclusion: The prevalence of COVID-19 in hip fracture patients during the first wave of the pandemic was 9%, and was independently associated with a three-fold increased 30-day mortality risk.

Published
2022

10. Reply: Concerns with the use of Genelyn cadavers for surgical simulation

Author

Loh, Charles, Ng, Nigel, and Athanassopoulos, Thanassi

Subjects
Patient simulation -- Methods, Plastic surgery -- Study and teaching, Cadavers -- Usage, Health
Abstract

Byline: Charles. Loh, Nigel. Ng, Thanassi. Athanassopoulos Sir, Thank you for your comments. You question our statement on the softness and pliability quoting a review article which contains that single [...]

Published
2016

11. A cost-effective cadaveric model for plastic surgery simulation

Author

Ng, Nigel, Loh, Charles, and Athanassopoulos, Thanassi

Subjects
Medical personnel training -- Methods, Cost benefit analysis, Plastic surgery -- Methods, Cadavers -- Usage, Cost benefit analysis, Health
Abstract

Byline: Nigel. Ng, Charles. Loh, Thanassi. Athanassopoulos Sir, The hours plastic surgery trainees spend in the operating theatre are increasingly limited compared to their predecessors due to current working time [...]

Published
2016

12. Simple ways to improve undergraduate plastic surgery education

Author

Ng, Nigel and Twoon, Mark

Subjects
Health
Abstract

Byline: Nigel. Ng, Mark. Twoon Sir, We read with great interest the recent article 'Plastic surgery for undergraduates: The basis of exceptional doctors as demonstrated by India.' [sup][1] Lemon demonstrated [...]

Published
2015

14. Iatrogenic metacarpal fracture complication secondary to K-wire fixation

Author

Loh, Charles Yuen, Ng, Nigel Yong, Loh, Meiling, Kandamany, Nanda, and Athanassopoulos, Thanassi

Subjects
Orthopedic surgery -- Methods -- Patient outcomes, Metacarpus -- Injuries -- Care and treatment, Health
Abstract

Byline: Charles Yuen. Loh, Nigel Yong. Ng, Meiling. Loh, Nanda. Kandamany, Thanassi. Athanassopoulos Sir, We present a K-wire-related complication in the management of a Bennett fracture and would like to [...]

Published
2014

16. Bioengineered nerve conduits and wraps for peripheral nerve repair of the upper limb

Author

Thomson, Suzanne E., Ng, Nigel Y.B., Riehle, Mathis O., Kingham, Paul J., Dahlin, Lars B., Wiberg, Mikael, Hart, Andrew M., Thomson, Suzanne E., Ng, Nigel Y.B., Riehle, Mathis O., Kingham, Paul J., Dahlin, Lars B., Wiberg, Mikael, and Hart, Andrew M.

Abstract

This is a protocol for a Cochrane Review (Intervention). The objectives are as follows: To assess and compare the effects and complication rates of licensed bioengineered nerve conduits or wraps for surgical repair of traumatic peripheral nerve injuries of the upper limb. To compare effects and complications against the current gold surgical standard (nerve autograft)., Newer version: https://doi.org/10.1002/14651858.CD012574.pub2

Published
2017
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18. A Phosphorus Burn

Author

Ng, Nigel Yong Boon, Abdullah, Anas, and Milner, Stephen M.

Subjects
Interesting Case Series, injury, burn, grenade, phosphorus, management
Published
2015

19. Cement Burn

Author

Ng, Nigel Yong Boon, Abdullah, Anas, and Milner, Stephen M.

Subjects
cement, Interesting Case Series, chemical injury, treatment, burn, alkaline
Published
2015

20. Lymphoplasmacytic Sclerosing Pancreatitis and Retroperitoneal Fibrosis

Author

Koo Ng, Nigel K. F., Bong, Jin J., and Williamson, Robin C.

Subjects
Article Subject, parasitic diseases, fungi
Abstract

Although cases of lymphoplasmacytic sclerosing pancreatitis (LSP) associated with idiopathic retroperitoneal fibrosis have been reported, the association is rare. We describe a 74-year-old man who presented with obstructive jaundice and weight loss. Nineteen months earlier, he had been diagnosed with idiopathic retroperitoneal fibrosis and treated with bilateral ureteric stents. Initial investigations were suggestive of a diagnosis of LSP, however, a malignant cause could not be ruled out. He underwent an exploratory laparotomy and frozen sections confirmed the diagnosis of LSP. An internal biliary bypass was performed using a Roux loop of jejunum, and the patient made an uneventful recovery. This case illustrates the difficulty in distinguishing LSP from pancreatic carcinoma preoperatively.

Published
2008
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22. A cost-effective cadaveric model for plastic surgery simulation.

Author

Yong Boon Ng, Nigel, Yuen Yung Loh, Charles, and Athanassopoulos, Thanassi

Subjects
*MEDICAL cadavers, *PLASTIC surgery, *SIMULATION methods & models, *SURGICAL flaps, *SURGERY
Abstract

This article discusses the use of a cadaveric model for plastic surgery stimulation and presents a pilot study on the comparison between Genelyn and formalin cadavers in raising microvascular flaps. It tackles the downside of the use of fresh frozen cadavers in providing a realistic simulation of live surgery, and factors to be considered in choosing a technique for plastic surgery simulation.

Published
2016
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24. Simple ways to improve undergraduate plastic surgery education.

Author

Yong Boon Ng, Nigel and Twoon, Mark

Subjects
*PLASTIC surgery, *MEDICAL students, *EDUCATION
Abstract

A letter to the editor is presented in response to the article "Plastic surgery for undergraduates: The basis of exceptional doctors as demonstrated by India" by T. I. Lemon that was published in the previous issue.

Published
2015
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25. Bioengineered nerve conduits and wraps for peripheral nerve repair of the upper limb.

Author

Thomson SE, Ng NY, Riehle MO, Kingham PJ, Dahlin LB, Wiberg M, and Hart AM

Subjects
Humans, Upper Extremity surgery, Peripheral Nerves surgery
Abstract

Background: Traumatic peripheral nerve injury is common and incurs significant cost to individuals and society. Healing following direct nerve repair or repair with autograft is slow and can be incomplete. Several bioengineered nerve wraps or devices have become available as an alternative to direct repair or autologous nerve graft. Nerve wraps attempt to reduce axonal escape across a direct repair site and nerve devices negate the need for a donor site defect, required by an autologous nerve graft. Comparative evidence to guide clinicians in their potential use is lacking. We collated existing evidence to guide the clinical application of currently available nerve wraps and conduits., Objectives: To assess and compare the effects and complication rates of licensed bioengineered nerve conduits or wraps for surgical repair of traumatic peripheral nerve injuries of the upper limb. To compare effects and complications against the current gold surgical standard (direct repair or nerve autograft)., Search Methods: We used standard, extensive Cochrane search methods. The latest search was 26 January 2022. We searched online and, where not accessible, contacted societies' secretariats to review abstracts from the British Surgical Society of the Hand, International Federation of Surgical Societies of the Hand, Federation of European Surgical Societies of the Hand, and the American Society for Peripheral Nerve from October 2007 to October 2018., Selection Criteria: We included parallel group randomised controlled trials (RCTs) and quasi-RCTs of nerve repair in the upper limb using a bioengineered wrap or conduit, with at least 12 months of follow-up., Data Collection and Analysis: We used standard Cochrane procedures. Our primary outcomes were 1. muscle strength and 2. sensory recovery at 24 months or more. Our secondary outcomes were 3. British Medical Research Council (BMRC) grading, 4. integrated functional outcome (Rosén Model Instrument (RMI)), 5. touch threshold, 6. two-point discrimination, 7. cold intolerance, 8. impact on daily living measured using the Disability of Arm Shoulder and Hand Patient-Reported Outcome Measure (DASH-PROM), 9. sensory nerve action potential, 10. cost of the device, and 11. adverse events (any and specific serious adverse events (further surgery)). We used GRADE to assess the certainty of the evidence., Main Results: Five studies involving 213 participants and 257 nerve injuries reconstructed with wraps or conduits (129 participants) or standard repair (128 participants) met the inclusion criteria. Of those in the standard repair group, 119 nerve injuries were managed with direct epineurial repair, and nine autologous nerve grafts were performed. One study excluded the outcome data for the repair using an autologous nerve graft from their analysis, as it was the only autologous nerve graft in the study, so data were available for 127 standard repairs. There was variation in the functional outcome measures reported and the time postoperatively at which they were recorded. Mean sensory recovery, assessed with BMRC sensory grading (range S0 to S4, higher score considered better) was 0.03 points higher in the device group (range 0.43 lower to 0.49 higher; 1 RCT, 28 participants; very low-certainty evidence) than in the standard repair group (mean 2.75 points), which suggested little or no difference between the groups, but the evidence is very uncertain. There may be little or no difference at 24 months in mean touch thresholds between standard repair (0.81) and repair using devices, which was 0.01 higher but this evidence is also very uncertain (95% confidence interval (CI) 0.06 lower to 0.08 higher; 1 trial, 32 participants; very low-certainty evidence). Data were not available to assess BMRC motor grading at 24 months or more. Repair using bioengineered devices may not improve integrated functional outcome scores at 24 months more than standard techniques, as assessed by the Rosén Model Instrument (RMI; range 0 to 3, higher scores better); the CIs allow for both no important difference and a better outcome with standard repair (mean RMI 1.875), compared to the device group (0.17 lower, 95% CI 0.38 lower to 0.05 higher; P = 0.13; 2 trials, 60 participants; low-certainty evidence). Data from one study suggested that the five-year postoperative outcome of RMI may be slightly improved after repair using a device (mean difference (MD) 0.23, 95% CI 0.07 to 0.38; 1 trial, 28 participants; low-certainty evidence). No studies measured impact on daily living using DASH-PROM. The proportion of people with adverse events may be greater with nerve wraps or conduits than with standard techniques, but the evidence is very uncertain (risk ratio (RR) 7.15, 95% CI 1.74 to 29.42; 5 RCTs, 213 participants; very low-certainty evidence). This corresponds to 10 adverse events per 1000 people in the standard repair group and 68 per 1000 (95% CI 17 to 280) in the device group. The use of nerve repair devices may be associated with a greater need for revision surgery but this evidence is also very uncertain (12/129 device repairs required revision surgery (removal) versus 0/127 standard repairs; RR 7.61, 95% CI 1.48 to 39.02; 5 RCTs, 256 nerve repairs; very low-certainty evidence)., Authors' Conclusions: Based on the available evidence, this review does not support use of currently available nerve repair devices over standard repair. There is significant heterogeneity in participants, injury pattern, repair timing, and outcome measures and their timing across studies of nerve repair using bioengineered devices, which make comparisons unreliable. Studies were generally small and at high or unclear risk of bias. These factors render the overall certainty of evidence for any outcome low or very low. The data reviewed here provide some evidence that more people may experience adverse events with use of currently available bioengineered devices than with standard repair techniques, and the need for revision surgery may also be greater. The evidence for sensory recovery is very uncertain and there are no data for muscle strength at 24 months (our primary outcome measures). We need further trials, adhering to a minimum standard of outcome reporting (with at least 12 months' follow-up, including integrated sensorimotor evaluation and patient-reported outcomes) to provide high-certainty evidence and facilitate more detailed analysis of effectiveness of emerging, increasingly sophisticated, bioengineered repair devices., (Copyright © 2022 The Cochrane Collaboration. Published by John Wiley & Sons, Ltd.)

Published
2022
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26. Lymphoplasmacytic sclerosing pancreatitis and retroperitoneal fibrosis.

Author

Ng NK, Bong JJ, and Williamson RC

Abstract

Although cases of lymphoplasmacytic sclerosing pancreatitis (LSP) associated with idiopathic retroperitoneal fibrosis have been reported, the association is rare. We describe a 74-year-old man who presented with obstructive jaundice and weight loss. Nineteen months earlier, he had been diagnosed with idiopathic retroperitoneal fibrosis and treated with bilateral ureteric stents. Initial investigations were suggestive of a diagnosis of LSP, however, a malignant cause could not be ruled out. He underwent an exploratory laparotomy and frozen sections confirmed the diagnosis of LSP. An internal biliary bypass was performed using a Roux loop of jejunum, and the patient made an uneventful recovery. This case illustrates the difficulty in distinguishing LSP from pancreatic carcinoma preoperatively.

Published
2008
Full Text
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