Items where Author is "Leyrat, Clémence"

Number of items: 73.
Article
  • Effects of ACE inhibitors and angiotensin receptor blockers: protocol for a UK cohort study using routinely collected electronic health records with validation against the ONTARGET trial. (2022) Baptiste, Paris J; Wong, Angel YS; Schultze, Anna; Cunnington, Marianne; Mann, Johannes FE; Clase, Catherine; Leyrat, Clémence; Tomlinson, Laurie A; Wing, Kevin
  • Open science saves lives: lessons from the COVID-19 pandemic. (2021) Besançon, Lonni; Peiffer-Smadja, Nathan; Segalas, Corentin; Jiang, Haiting; Masuzzo, Paola; Smout, Cooper; Billy, Eric; Deforet, Maxime; Leyrat, Clémence
  • Application of Inverse-Probability-of-Treatment Weighting to Estimate the Effect of Daytime Sleepiness in Patients with Obstructive Sleep Apnea. (2022) Bettega, François; Leyrat, Clémence; Tamisier, Renaud; Mendelson, Monique; Grillet, Yves; Sapène, Marc; Bonsignore, Maria R; Pépin, Jean Louis; Kattan, Michael W; Bailly, Sébastien
  • Use and reporting of inverse-probability-of-treatment weighting for multicategory treatments in medical research: a systematic review. (2024) Bettega, François; Mendelson, Monique; Leyrat, Clémence; Bailly, Sébastien
  • Is there an association between long-term antibiotics for acne and subsequent infection sequelae and antimicrobial resistance? A systematic review. (2021) Bhate, Ketaki; Lin, Liang-Yu; Barbieri, John S; Leyrat, Clémence; Hopkins, Susan; Stabler, Richard; Shallcross, Laura; Smeeth, Liam; Francis, Nick; Mathur, Rohini; Langan, Sinéad M; Sinnott, Sarah-Jo picture_as_pdf
  • Is there an association between long-term antibiotics for acne and subsequent infection sequelae and antimicrobial resistance? A systematic review protocol. (2020) Bhate, Ketaki; Lin, Liang-Yu; Barbieri, John; Leyrat, Clémence; Hopkins, Susan; Stabler, Richard; Shallcross, Laura; Smeeth, Liam; Francis, Nick A; Mathur, Rohini; Langan, Sinéad M; Sinnott, Sarah-Jo picture_as_pdf
  • Long-term oral antibiotic use in people with acne vulgaris in UK primary care: a drug utilization study. (2023) Bhate, Ketaki; Mansfield, Kathryn E; Sinnott, Sarah-Jo; Margolis, David J; Adesanya, Elizabeth; Francis, Nick; Leyrat, Clemence; Hopkins, Susan; Stabler, Richard; Shallcross, Laura; Langan, Sinéad M; Mathur, Rohini
  • Stopping renin-angiotensin system blockers after acute kidney injury and risk of adverse outcomes: parallel population-based cohort studies in English and Swedish routine care. (2020) Bidulka, Patrick; Fu, Edouard L; Leyrat, Clémence; Kalogirou, Fotini; McAllister, Katherine SL; Kingdon, Edward J; Mansfield, Kathryn E; Iwagami, Masao; Smeeth, Liam; Clase, Catherine M; Bhaskaran, Krishnan; van Diepen, Merel; Carrero, Juan-Jesus; Nitsch, Dorothea; Tomlinson, Laurie A
  • How should a cluster randomized trial be analyzed? (2024) Billot, Laurent; Copas, Andrew; Leyrat, Clemence; Forbes, Andrew; Turner, Elizabeth L
  • Propensity scores using missingness pattern information: a practical guide. (2019) Blake, Helen A; Leyrat, Clemence; Mansfield, Kathryn E; Seaman, Shaun; Tomlinson, Laurie A; Carpenter, James; Williamson, Elizabeth J
  • Propensity scores using missingness pattern information: a practical guide. (2020) Blake, Helen A; Leyrat, Clémence; Mansfield, Kathryn E; Seaman, Shaun; Tomlinson, Laurie A; Carpenter, James; Williamson, Elizabeth J picture_as_pdf
  • Estimating treatment effects with partially observed covariates using outcome regression with missing indicators. (2019) Blake, Helen A; Leyrat, Clémence; Mansfield, Kathryn E; Tomlinson, Laurie A; Carpenter, James; Williamson, Elizabeth J picture_as_pdf
  • Systemic Fluoroquinolone Use and Risk of Uveitis or Retinal Detachment. (2024) Brown, Jeremy P; Wing, Kevin; Evans, Stephen J; Leyrat, Clémence; Mansfield, Kathryn E; Smeeth, Liam; Wong, Angel YS; Yorston, David; Galwey, Nicholas W; Douglas, Ian J
  • Association Between Fluoroquinolone Use and Hospitalization With Aortic Aneurysm or Aortic Dissection. (2023) Brown, Jeremy P; Wing, Kevin; Leyrat, Clémence; Evans, Stephen J; Mansfield, Kathryn E; Wong, Angel YS; Smeeth, Liam; Galwey, Nicholas W; Douglas, Ian J
  • Timeline cluster: a graphical tool to identify risk of bias in cluster randomised trials. (2016) Caille, A; Kerry, S; Tavernier, E; Leyrat, C; Eldridge, S; Giraudeau, B
  • Dichotomizing a continuous outcome in cluster randomized trials: impact on power. (2012) Caille, Agnès; Leyrat, Clémence; Giraudeau, Bruno
  • A comparison of imputation strategies in cluster randomized trials with missing binary outcomes. (2014) Caille, Agnès; Leyrat, Clémence; Giraudeau, Bruno
  • Quality of reporting of pilot and feasibility cluster randomised trials: a systematic review. (2017) Chan, Claire L; Leyrat, Clémence; Eldridge, Sandra M
  • A website for cluster randomised trials including stepped wedge: facilitating quality trials and methodological research. (2024) Chan, Claire L; Leyrat, Clémence; Martin, James; Thompson, Jennifer; Turner, Elizabeth L; Eldridge, Sandra M
  • G-computation and doubly robust standardisation for continuous-time data: A comparison with inverse probability weighting. (2021) Chatton, Arthur; Borgne, Florent Le; Leyrat, Clémence; Foucher, Yohann
  • G-computation, propensity score-based methods, and targeted maximum likelihood estimator for causal inference with different covariates sets: a comparative simulation study. (2020) Chatton, Arthur; Le Borgne, Florent; Leyrat, Clémence; Gillaizeau, Florence; Rousseau, Chloé; Barbin, Laetitia; Laplaud, David; Léger, Maxime; Giraudeau, Bruno; Foucher, Yohann
  • Trimethoprim use for urinary tract infection and risk of adverse outcomes in older patients: cohort study. (2018) Crellin, Elizabeth; Mansfield, Kathryn E; Leyrat, Clémence; Nitsch, Dorothea; Douglas, Ian J; Root, Adrian; Williamson, Elizabeth; Smeeth, Liam; Tomlinson, Laurie A
  • Falling Asleep on the Job: The Efficacy of a Short App-Based Mindfulness Intervention to Improve Sleep Quality and Quantity Within the Workforce. (2025) Daniel, Carole; Leyrat, Clémence; Gentina, Elodie; Mesmer-Magnus, Jessica; Guidice, Rebecca; Bailly, Sebastien picture_as_pdf
  • Primary prevention of acute cardiovascular events by influenza vaccination: an observational study. (2022) Davidson, Jennifer A; Banerjee, Amitava; Douglas, Ian; Leyrat, Clémence; Pebody, Richard; McDonald, Helen I; Herrett, Emily; Forbes, Harriet; Smeeth, Liam; Warren-Gash, Charlotte
  • Peer review of grant applications: a simple method to identify proposals with discordant reviews. (2011) Giraudeau, Bruno; Leyrat, Clémence; Le Gouge, Amélie; Léger, Julie; Caille, Agnès
  • The effect of initiation of renin-angiotensin system inhibitors on haemoglobin: A national cohort study. (2020) Greenhall, George HB; Mansfield, Kathryn E; Nitsch, Dorothea; Iwagami, Masao; Leyrat, Clemence; Johnston, Rosalynd; Smeeth, Liam; Tomlinson, Laurie A
  • The effect of initiation of renin-angiotensin system inhibitors on haemoglobin: A national cohort study. (2021) Greenhall, George HB; Mansfield, Kathryn E; Nitsch, Dorothea; Iwagami, Masao; Leyrat, Clémence; Johnston, Rosalynd; Smeeth, Liam; Tomlinson, Laurie A
  • Causal and Associational Language in Observational Health Research: A Systematic Evaluation. (2022) Haber, Noah A; Wieten, Sarah E; Rohrer, Julia M; Arah, Onyebuchi A; Tennant, Peter WG; Stuart, Elizabeth A; Murray, Eleanor J; Pilleron, Sophie; Lam, Sze Tung; Riederer, Emily; Howcutt, Sarah Jane; Simmons, Alison E; Leyrat, Clémence; Schoenegger, Philipp; Booman, Anna; Dufour, Mi-Suk Kang; O'Donoghue, Ashley L; Baglini, Rebekah; Do, Stefanie; Takashima, Mari De La Rosa; Evans, Thomas Rhys; Rodriguez-Molina, Daloha; Alsalti, Taym M; Dunleavy, Daniel J; Meyerowitz-Katz, Gideon; Antonietti, Alberto; Calvache, Jose A; Kelson, Mark J; Salvia, Meg G; Parra, Camila Olarte; Khalatbari-Soltani, Saman; McLinden, Taylor; Chatton, Arthur; Seiler, Jessie; Steriu, Andreea; Alshihayb, Talal S; Twardowski, Sarah E; Dabravolskaj, Julia; Au, Eric; Hoopsick, Rachel A; Suresh, Shashank; Judd, Nicholas; Peña, Sebastián; Axfors, Cathrine; Khan, Palwasha; Rivera Aguirre, Ariadne E; Odo, Nnaemeka U; Schmid, Ian; Fox, Matthew P
  • Extracorporeal Membrane Oxygenation for Severe Acute Respiratory Distress Syndrome Associated with COVID-19: An Emulated Target Trial Analysis. (2022) Hajage, David; Combes, Alain; Guervilly, Christophe; Lebreton, Guillaume; Mercat, Alain; Pavot, Arthur; Nseir, Saad; Mekontso-Dessap, Armand; Mongardon, Nicolas; Mira, Jean Paul; Ricard, Jean-Damien; Beurton, Alexandra; Tachon, Guillaume; Kontar, Loay; Le Terrier, Christophe; Richard, Jean Christophe; Mégarbane, Bruno; Keogh, Ruth H; Belot, Aurélien; Maringe, Camille; Leyrat, Clémence; Schmidt, Matthieu; COVID-ICU Investigators
  • Guidelines for the content of statistical analysis plans in clinical trials: protocol for an extension to cluster randomized trials. (2025) Hemming, Karla; Thompson, Jacqueline Y; Hooper, Richard L; Ukoumunne, Obioha C; Li, Fan; Caille, Agnes; Kahan, Brennan C; Leyrat, Clemence; Grayling, Michael J; Mohammed, Nuredin I; Thompson, Jennifer A; Giraudeau, Bruno; Turner, Elizabeth L; Watson, Samuel I; Goulão, Beatriz; Kasza, Jessica; Forbes, Andrew B; Copas, Andrew J; Taljaard, Monica picture_as_pdf
  • Increased risk of type I errors in cluster randomised trials with small or medium numbers of clusters: a review, reanalysis, and simulation study. (2016) Kahan, Brennan C; Forbes, Gordon; Ali, Yunus; Jairath, Vipul; Bremner, Stephen; Harhay, Michael O; Hooper, Richard; Wright, Neil; Eldridge, Sandra M; Leyrat, Clémence
  • Bariatric Surgery and Cardiovascular Disease: The Target Trial Emulation Framework Provides Transparency in Articulating the Limits of Observational Studies. (2024) Katsoulis, Michail; Leyrat, Clemence; Hingorani, Aroon; Gomes, Manuel picture_as_pdf
  • Projecting the impact of triple CFTR modulator therapy on intravenous antibiotic requirements in cystic fibrosis using patient registry data combined with treatment effects from randomised trials. (2021) Keogh, Ruth H; Cosgriff, Rebecca; Andrinopoulou, Eleni-Rosalina; Brownlee, Keith G; Carr, Siobhán B; Diaz-Ordaz, Karla; Granger, Emily; Jewell, Nicholas P; Lewin, Alex; Leyrat, Clemence; Schlüter, Daniela K; van Smeden, Maarten; Szczesniak, Rhonda D; Connett, Gary J
  • Probabilities of ICU admission and hospital discharge according to patient characteristics in the designated COVID-19 hospital of Kuwait. (2021) Kipourou, Dimitra-Kleio; Leyrat, Clémence; Alsheridah, Nourah; Almazeedi, Sulaiman; Al-Youha, Sarah; Jamal, Mohammad H; Al-Haddad, Mohannad; Al-Sabah, Salman; Rachet, Bernard; Belot, Aurélien
  • Correction to: Probabilities of ICU admission and hospital discharge according to patient characteristics in the designated COVID-19 hospital of Kuwait. (2021) Kipourou, Dimitra-Kleio; Leyrat, Clémence; Alsheridah, Nourah; Almazeedi, Sulaiman; Al-Youha, Sarah; Jamal, Mohammad H; Al-Haddad, Mohannad; Al-Sabah, Salman; Rachet, Bernard; Belot, Aurélien
  • Propensity scores used for analysis of cluster randomized trials with selection bias: a simulation study. (2013) Leyrat, C; Caille, A; Donner, A; Giraudeau, B
  • Propensity score analysis with partially observed covariates: How should multiple imputation be used? (2017) Leyrat, C; Seaman, SR; White, IR; Douglas, I; Smeeth, L; Kim, J; Resche-Rigon, M; Carpenter, JR; Williamson, EJ
  • Propensity score methods for estimating relative risks in cluster randomized trials with low-incidence binary outcomes and selection bias. (2014) Leyrat, Clémence; Caille, Agnès; Donner, Allan; Giraudeau, Bruno
  • Intervention effect estimates in cluster randomized versus individually randomized trials: a meta-epidemiological study. (2018) Leyrat, Clémence; Caille, Agnès; Eldridge, Sandra; Kerry, Sally; Dechartres, Agnès; Giraudeau, Bruno
  • Propensity score to detect baseline imbalance in cluster randomized trials: the role of the c-statistic. (2015) Leyrat, Clémence; Caille, Agnès; Foucher, Yohann; Giraudeau, Bruno
  • Common Methods for Handling Missing Data in Marginal Structural Models: What Works and Why. (2020) Leyrat, Clémence; Carpenter, James R; Bailly, Sébastien; Williamson, Elizabeth J
  • Cluster randomized trials with a small number of clusters: which analyses should be used? (2017) Leyrat, Clémence; Morgan, Katy E; Leurent, Baptiste; Kahan, Brennan C
  • Response to: How to design and analyse cluster randomized trials with a small number of clusters? Comment on Leyrat et al. (2018) Leyrat, Clémence; Morgan, Katy E; Leurent, Baptiste; Kahan, Brennan C
  • Associations between treatments, comorbidities and multidimensional aspects of quality of life among patients with advanced cancer in the Netherlands-a 2017-2020 multicentre cross-sectional study. (2023) Malhotra, Ananya; Fransen, Heidi P; Quaresma, Manuela; Raijmakers, Natasja; Versluis, Moyke AJ; Rachet, Bernard; van Maaren, Marissa C; Leyrat, Clémence
  • Changes in global quality of life after treatment with immune checkpoint inhibitors in patients receiving different treatment regimens for advanced stage lung cancer in the Netherlands: a 2015-2021 cohort study. (2025) Malhotra, Ananya; Suazo-Zepeda, Erick; Vinke, Petra C; de Bock, Geertruida H; Maas, Willemijn J; Hiltermann, Jeroen TJN; Rachet, Bernard; Leyrat, Clémence; Quaresma, Manuela picture_as_pdf
  • Reply to: Versatility of the clone-censor-weight approach: response to ''trial emulation in the presence of immortal-time bias''. (2020) Maringe, Camille; Benitez Majano, Sara; Exarchakou, Aimilia; Smith, Matthew; Rachet, Bernard; Belot, Aurélien; Leyrat, Clémence picture_as_pdf
  • Applying the Estimands Framework to Non-Inferiority Trials: Guidance on Choice of Hypothetical Estimands for Non-Adherence and Comparison of Estimation Methods. (2025) Morgan, Katy E; White, Ian R; Leyrat, Clémence; Stanworth, Simon; Kahan, Brennan C picture_as_pdf
  • Re: Subramanian and Kumar. Vaccination rates and COVID-19 cases. (2021) Mulot, Matthieu; Segalas, Corentin; Leyrat, Clémence; Besançon, Lonni
  • Immortal-time bias in older vs younger age groups: a simulation study with application to a population-based cohort of patients with colon cancer. (2023) Pilleron, Sophie; Maringe, Camille; Morris, Eva JA; Leyrat, Clémence
  • MatchThem:: Matching and Weighting after Multiple Imputation. (2021) Pishgar, Farhad; Greifer, Noah; Leyrat, Clemence; Stuart, Elizabeth
  • Performance of principal scores to estimate the marginal compliers causal effect of an intervention. (2015) Porcher, Raphaël; Leyrat, Clémence; Baron, Gabriel; Giraudeau, Bruno; Boutron, Isabelle
  • Effectiveness of a multicomponent pharmacist intervention at hospital discharge for drug-related problems: A cluster randomised cross-over trial. (2020) Pourrat, Xavier; Leyrat, Clémence; Allenet, Benoît; Bouzige, Brigitte; Develay, Armelle; Fraysse, Martial; Garnier, Valérie; Halimi, Jean-Michel; Roux-Marson, Clarisse; Giraudeau, Bruno
  • Characteristics of interventions aimed at reducing inequalities along the cancer continuum: A scoping review. (2025) Safari, Wende C; Gravenhorst, Katja; Leyrat, Clemence; Shimizu, Koki; Smith, Matthew J; Aggarwal, Ajay; Maringe, Camille picture_as_pdf
  • Letter to the Editor: Pulling Unmeasured Confounding Out by your Bootstraps: Too Good to be True? (2022) Segalas, Corentin; Leyrat, Clemence; Williamson, Elizabeth
  • Addressing missing data in the estimation of time-varying treatments in comparative effectiveness research. (2023) Segura-Buisan, Juan; Leyrat, Clemence; Gomes, Manuel
  • Introduction to computational causal inference using reproducible Stata, R, and Python code: A tutorial. (2021) Smith, Matthew J; Mansournia, Mohammad A; Maringe, Camille; Zivich, Paul N; Cole, Stephen R; Leyrat, Clémence; Belot, Aurélien; Rachet, Bernard; Luque-Fernandez, Miguel A
  • Association between multimorbidity and socioeconomic deprivation on short-term mortality among patients with diffuse large B-cell or follicular lymphoma in England: a nationwide cohort study. (2021) Smith, Matthew James; Njagi, Edmund Njeru; Belot, Aurelien; Leyrat, Clémence; Bonaventure, Audrey; Benitez Majano, Sara; Rachet, Bernard; Luque Fernandez, Miguel Angel
  • Propensity score matching after multiple imputation when a confounder has missing data. (2023) Ségalas, Corentin; Leyrat, Clémence; Carpenter, James R; Williamson, Elizabeth
  • A comparison of covariate adjustment approaches under model misspecification in individually randomized trials. (2023) Tackney, Mia S; Morris, Tim; White, Ian; Leyrat, Clemence; Diaz-Ordaz, Karla; Williamson, Elizabeth
  • Cluster randomised trials with a binary outcome and a small number of clusters: comparison of individual and cluster level analysis method. (2022) Thompson, Jennifer A; Leyrat, Clemence; Fielding, Katherine L; Hayes, Richard J
  • Monitoring multidimensional aspects of quality of life after cancer immunotherapy: protocol for the international multicentre, observational QUALITOP cohort study. (2023) Vinke, Petra C; Combalia, Marc; de Bock, Geertruida H; Leyrat, Clémence; Spanjaart, Anne Mea; Dalle, Stephane; Gomes da Silva, Maria; Fouda Essongue, Aurore; Rabier, Aurélie; Pannard, Myriam; Jalali, Mohammad S; Elgammal, Amal; Papazoglou, Mike; Hacid, Mohand-Said; Rioufol, Catherine; Kersten, Marie-José; van Oijen, Martijn Gh; Suazo-Zepeda, Erick; Malhotra, Ananya; Coquery, Emmanuel; Anota, Amélie; Preau, Marie; Fauvernier, Mathieu; Coz, Elsa; Puig, Susana; Maucort-Boulch, Delphine
  • The association between proton pump inhibitors and the risk of gastrointestinal bleeding in oral anticoagulants users. (2025) Wang, Zixuan; Yu, Qiuyan; Warren-Gash, Charlotte; Bhaskaran, Krishnan; Leyrat, Clémence; Cheung, Ka Shing; Chui, Celine SL; Chan, Esther W; Wong, Ian CK; Banerjee, Amitava; Smeeth, Liam; Douglas, Ian J; Wong, Angel YS
  • Effects of proactive vs fixed community health care delivery on child health and access to care: a cluster randomised trial secondary endpoint analysis. (2023) Whidden, Caroline; Kayentao, Kassoum; Koné, Naimatou; Liu, Jenny; Traoré, Mohamed Bana; Diakité, Djoumé; Coumaré, Mama; Berthé, Mohamed; Guindo, Mahamadou; Greenwood, Brian; Chandramohan, Daniel; Leyrat, Clémence; Treleaven, Emily; Johnson, Ari
  • Proactive case detection of common childhood illnesses by community health workers: a systematic review. (2019) Whidden, Caroline; Thwing, Julie; Gutman, Julie; Wohl, Ethan; Leyrat, Clémence; Kayentao, Kassoum; Johnson, Ari David; Greenwood, Brian; Chandramohan, Daniel
  • Does internet-accessed STI (e-STI) testing increase testing uptake for chlamydia and other STIs among a young population who have never tested? Secondary analyses of data from a randomised controlled trial. (2019) Wilson, Emma; Leyrat, Clémence; Baraitser, Paula; Free, Caroline
  • Improving the validity of noninterventional comparative effectiveness research by basing study design on a specified existing randomized controlled trial. (2024) Wing, Kevin; Leyrat, Clémence
  • Potential interactions between medications for rate control and direct oral anticoagulants: Population-based cohort and case-crossover study. (2024) Wong, Angel YS; Warren-Gash, Charlotte; Bhaskaran, Krishnan; Leyrat, Clémence; Banerjee, Amitava; Smeeth, Liam; Douglas, Ian J picture_as_pdf
  • Potential interactions between digoxin and direct oral anticoagulants: application of cohort & novel case-crossover designs. (2025) Wong, Angel YS; Warren-Gash, Charlotte; Bhaskaran, Krishnan; Leyrat, Clémence; Banerjee, Amitava; Smeeth, Liam; Douglas, Ian J picture_as_pdf
  • Potential interactions between antimicrobials and direct oral anticoagulants: Population-based cohort and case-crossover study. (2025) Wong, Angel YS; Warren-Gash, Charlotte; Bhaskaran, Krishnan; Leyrat, Clémence; Banerjee, Amitava; Smeeth, Liam; Douglas, Ian J picture_as_pdf
  • Potential interactions between direct oral anticoagulants and atorvastatin/simvastatin: a cohort and case-crossover study. (2024) Wong, Angel Ys; Warren-Gash, Charlotte; Bhaskaran, Krishnan; Leyrat, Clémence; Banerjee, Amitava; Smeeth, Liam; Douglas, Ian J picture_as_pdf
  • Ivermectin treatment in humans for reducing malaria transmission. (2021) de Souza, Dziedzom K; Thomas, Rebecca; Bradley, John; Leyrat, Clemence; Boakye, Daniel A; Okebe, Joseph
    • Conference or Workshop Item
  • The quality of reporting of pilot and feasibility cluster randomised trials: a systematic review. (2015) Coleman, Claire; Leyrat, Clemence; Eldridge, Sandra
    • Thesis
  • Comparison of causal inference methods for observational data with a hierarchical structure. (2024) Kostouraki, A