Tackney, Mia S; Morris, Tim; White, Ian; Leyrat, Clemence; Diaz-Ordaz, Karla; Williamson, Elizabeth; (2023) A comparison of covariate adjustment approaches under model misspecification in individually randomized trials. Trials, 24 (1). p. 14. ISSN 1745-6215 DOI: https://doi.org/10.1186/s13063-022-06967-6

Baptiste, Paris J; Wong, Angel YS; Schultze, Anna; Cunnington, Marianne; Mann, Johannes FE; Clase, Catherine; Leyrat, Clémence; Tomlinson, Laurie A; Wing, Kevin; (2022) 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. BMJ Open, 12 (3). e051907-. ISSN 2044-6055 DOI: https://doi.org/10.1136/bmjopen-2021-051907

Bettega, François; Leyrat, Clémence; Tamisier, Renaud; Mendelson, Monique; Grillet, Yves; Sapène, Marc; Bonsignore, Maria R; Pépin, Jean Louis; Kattan, Michael W; Bailly, Sébastien; (2022) Application of Inverse-Probability-of-Treatment Weighting to Estimate the Effect of Daytime Sleepiness in Patients with Obstructive Sleep Apnea. Annals of the American Thoracic Society, 19 (9). pp. 1570-1580. ISSN 2329-6933 DOI: https://doi.org/10.1513/AnnalsATS.202109-1036OC Item availability may be restricted.

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; +39 more... 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; (2022) Causal and Associational Language in Observational Health Research: A Systematic Evaluation. American journal of epidemiology, 191 (12). pp. 2084-2097. ISSN 0002-9262 DOI: https://doi.org/10.1093/aje/kwac137 Item availability may be restricted.

Hajage, David; Combes, Alain; Guervilly, Christophe; Lebreton, Guillaume; Mercat, Alain; Pavot, Arthur; Nseir, Saad; Mekontso-Dessap, Armand; Mongardon, Nicolas; Mira, Jean Paul; +13 more... 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; (2022) Extracorporeal Membrane Oxygenation for Severe Acute Respiratory Distress Syndrome Associated with COVID-19: An Emulated Target Trial Analysis. American journal of respiratory and critical care medicine, 206 (3). pp. 281-294. ISSN 1073-449X DOI: https://doi.org/10.1164/rccm.202111-2495OC

Segalas, Corentin; Leyrat, Clemence; Williamson, Elizabeth; (2022) Letter to the Editor: Pulling Unmeasured Confounding Out by your Bootstraps: Too Good to be True? Journal of Statistical Research, 55 (2). pp. 293-297. ISSN 0256-422X DOI: https://doi.org/10.3329/jsr.v55i2.58806

Thompson, Jennifer A; Leyrat, Clemence; Fielding, Katherine L; Hayes, Richard J; (2022) Cluster randomised trials with a binary outcome and a small number of clusters: comparison of individual and cluster level analysis method. BMC Medical Research Methodology, 22 (1). 222-. ISSN 1471-2288 DOI: https://doi.org/10.1186/s12874-022-01699-2

Besançon, Lonni; Peiffer-Smadja, Nathan; Segalas, Corentin; Jiang, Haiting; Masuzzo, Paola; Smout, Cooper; Billy, Eric; Deforet, Maxime; Leyrat, Clémence; (2021) Open science saves lives: lessons from the COVID-19 pandemic. BMC medical research methodology, 21 (1). 117-. ISSN 1471-2288 DOI: https://doi.org/10.1186/s12874-021-01304-y

Bhate, Ketaki; Lin, Liang-Yu; Barbieri, John S; Leyrat, Clémence; Hopkins, Susan; Stabler, Richard; Shallcross, Laura; Smeeth, Liam; Francis, Nick; Mathur, Rohini; +2 more... Langan, Sinéad M; Sinnott, Sarah-Jo; (2021) Is there an association between long-term antibiotics for acne and subsequent infection sequelae and antimicrobial resistance? A systematic review. British Journal of General Practice Open, 5 (3). BJGPO.2020.0181-. DOI: https://doi.org/10.3399/BJGPO.2020.0181

Bhate, Ketaki; Lin, Liang-Yu; Barbieri, John; Leyrat, Clémence; Hopkins, Susan; Stabler, Richard; Shallcross, Laura; Smeeth, Liam; Francis, Nick A; Mathur, Rohini; +2 more... Langan, Sinéad M; Sinnott, Sarah-Jo; (2021) Is there an association between long-term antibiotics for acne and subsequent infection sequelae and antimicrobial resistance? A systematic review protocol. BMJ open, 10 (7). e033662-. ISSN 2044-6055 DOI: https://doi.org/10.1136/bmjopen-2019-033662

Chatton, Arthur; Borgne, Florent Le; Leyrat, Clémence; Foucher, Yohann; (2021) G-computation and doubly robust standardisation for continuous-time data: A comparison with inverse probability weighting. Statistical Methods in Medical Research, 31 (4). pp. 706-718. ISSN 0962-2802 DOI: https://doi.org/10.1177/09622802211047345

Greenhall, George HB; Mansfield, Kathryn E; Nitsch, Dorothea; Iwagami, Masao; Leyrat, Clémence; Johnston, Rosalynd; Smeeth, Liam; Tomlinson, Laurie A; (2021) The effect of initiation of renin-angiotensin system inhibitors on haemoglobin: A national cohort study. British journal of clinical pharmacology, 87 (2). pp. 622-631. ISSN 0306-5251 DOI: https://doi.org/10.1111/bcp.14429

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; +4 more... Schlüter, Daniela K; van Smeden, Maarten; Szczesniak, Rhonda D; Connett, Gary J; (2021) 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. Thorax, 77 (9). pp. 873-881. ISSN 0040-6376 DOI: https://doi.org/10.1136/thoraxjnl-2020-216265

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; (2021) Probabilities of ICU admission and hospital discharge according to patient characteristics in the designated COVID-19 hospital of Kuwait. BMC Public Health, 21 (1). 799-. DOI: https://doi.org/10.1186/s12889-021-10759-z

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; (2021) Correction to: Probabilities of ICU admission and hospital discharge according to patient characteristics in the designated COVID-19 hospital of Kuwait. BMC public health, 21 (1). 1193-. ISSN 1471-2458 DOI: https://doi.org/10.1186/s12889-021-11146-4

Mulot, Matthieu; Segalas, Corentin; Leyrat, Clémence; Besançon, Lonni; (2021) Re: Subramanian and Kumar. Vaccination rates and COVID-19 cases. EUROPEAN JOURNAL OF EPIDEMIOLOGY, 36 (12). pp. 1243-1244. ISSN 0393-2990 DOI: https://doi.org/10.1007/s10654-021-00817-6

Pishgar, Farhad; Greifer, Noah; Leyrat, Clemence; Stuart, Elizabeth; (2021) MatchThem:: Matching and Weighting after Multiple Imputation. R JOURNAL, 13 (2). pp. 292-305. ISSN 2073-4859 https://journal.r-project.org/archive/2021-2/

Smith, Matthew J; Mansournia, Mohammad A; Maringe, Camille; Zivich, Paul N; Cole, Stephen R; Leyrat, Clémence; Belot, Aurélien; Rachet, Bernard; Luque-Fernandez, Miguel A; (2021) Introduction to computational causal inference using reproducible Stata, R, and Python code: A tutorial. Statistics in medicine, 41 (2). pp. 407-432. ISSN 0277-6715 DOI: https://doi.org/10.1002/sim.9234

Smith, Matthew James; Njagi, Edmund Njeru; Belot, Aurelien; Leyrat, Clémence; Bonaventure, Audrey; Benitez Majano, Sara; Rachet, Bernard; Luque Fernandez, Miguel Angel; (2021) 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. BMJ OPEN, 11 (11). e049087-. ISSN 2044-6055 DOI: https://doi.org/10.1136/bmjopen-2021-049087

de Souza, Dziedzom K; Thomas, Rebecca; Bradley, John; Leyrat, Clemence; Boakye, Daniel A; Okebe, Joseph; (2021) Ivermectin treatment in humans for reducing malaria transmission. Cochrane Database of Systematic Reviews, 6 (6). CD013117-. ISSN 1469-493X DOI: https://doi.org/10.1002/14651858.CD013117.pub2

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; +5 more... Bhaskaran, Krishnan; van Diepen, Merel; Carrero, Juan-Jesus; Nitsch, Dorothea; Tomlinson, Laurie A; (2020) 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. BMC Medicine, 18 (1). 195-. DOI: https://doi.org/10.1186/s12916-020-01659-x

Blake, Helen A; Leyrat, Clémence; Mansfield, Kathryn E; Seaman, Shaun; Tomlinson, Laurie A; Carpenter, James; Williamson, Elizabeth J; (2020) Propensity scores using missingness pattern information: a practical guide. Statistics in Medicine, 39 (11). pp. 1641-1657. ISSN 0277-6715 DOI: https://doi.org/10.1002/sim.8503

Blake, Helen A; Leyrat, Clémence; Mansfield, Kathryn E; Tomlinson, Laurie A; Carpenter, James; Williamson, Elizabeth J; (2020) Estimating treatment effects with partially observed covariates using outcome regression with missing indicators. Biometrical Journal, 62 (2). pp. 428-443. ISSN 0323-3847 DOI: https://doi.org/10.1002/bimj.201900041

Chatton, Arthur; Le Borgne, Florent; Leyrat, Clémence; Gillaizeau, Florence; Rousseau, Chloé; Barbin, Laetitia; Laplaud, David; Léger, Maxime; Giraudeau, Bruno; Foucher, Yohann; (2020) G-computation, propensity score-based methods, and targeted maximum likelihood estimator for causal inference with different covariates sets: a comparative simulation study. Scientific Reports, 10 (1). 9219-. DOI: https://doi.org/10.1038/s41598-020-65917-x

Greenhall, George HB; Mansfield, Kathryn E; Nitsch, Dorothea; Iwagami, Masao; Leyrat, Clemence; Johnston, Rosalynd; Smeeth, Liam; Tomlinson, Laurie A; (2020) The effect of initiation of renin-angiotensin system inhibitors on haemoglobin: A national cohort study. British Journal of Clinical Pharmacology, 87 (2). pp. 622-631. ISSN 0306-5251 DOI: https://doi.org/10.1111/bcp.14429

Leyrat, Clémence; Carpenter, James R; Bailly, Sébastien; Williamson, Elizabeth J; (2020) Common Methods for Handling Missing Data in Marginal Structural Models: What Works and Why. American journal of epidemiology, 190 (4). pp. 663-672. ISSN 0002-9262 DOI: https://doi.org/10.1093/aje/kwaa225

Maringe, Camille; Benitez Majano, Sara; Exarchakou, Aimilia; Smith, Matthew; Rachet, Bernard; Belot, Aurélien; Leyrat, Clémence; (2020) Reply to: Versatility of the clone-censor-weight approach: response to ''trial emulation in the presence of immortal-time bias''. International Journal of Epidemiology, 50 (2). 696-. ISSN 0300-5771 DOI: https://doi.org/10.1093/ije/dyaa225

Maringe, Camille; Benitez Majano, Sara; Exarchakou, Aimilia; Smith, Matthew; Rachet, Bernard; Belot, Aurélien; Leyrat, Clémence; (2020) Reflection on modern methods: trial emulation in the presence of immortal-time bias. Assessing the benefit of major surgery for elderly lung cancer patients using observational data. Int J Epidemiol, 49 (5). pp. 1719-1729. ISSN 0300-5771 DOI: https://doi.org/10.1093/ije/dyaa057

Pourrat, Xavier; Leyrat, Clémence; Allenet, Benoît; Bouzige, Brigitte; Develay, Armelle; Fraysse, Martial; Garnier, Valérie; Halimi, Jean-Michel; Roux-Marson, Clarisse; Giraudeau, Bruno; (2020) Effectiveness of a multicomponent pharmacist intervention at hospital discharge for drug-related problems: A cluster randomised cross-over trial. British Journal of Clinical Pharmacology, 86 (12). pp. 2441-2454. ISSN 0306-5251 DOI: https://doi.org/10.1111/bcp.14349

Blake, Helen A; Leyrat, Clemence; Mansfield, Kathryn E; Seaman, Shaun; Tomlinson, Laurie A; Carpenter, James; Williamson, Elizabeth J; (2019) Propensity scores using missingness pattern information: a practical guide. ArXiv. https://arxiv.org/abs/1901.03981 (Unpublished)

Whidden, Caroline; Thwing, Julie; Gutman, Julie; Wohl, Ethan; Leyrat, Clémence; Kayentao, Kassoum; Johnson, Ari David; Greenwood, Brian; Chandramohan, Daniel; (2019) Proactive case detection of common childhood illnesses by community health workers: a systematic review. BMJ Global Health, 4 (6). e001799-. ISSN 2059-7908 DOI: https://doi.org/10.1136/bmjgh-2019-001799

Wilson, Emma; Leyrat, Clémence; Baraitser, Paula; Free, Caroline; (2019) 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. Sexually Transmitted Infections, 95 (8). pp. 569-574. ISSN 1368-4973 DOI: https://doi.org/10.1136/sextrans-2019-053992

Crellin, Elizabeth; Mansfield, Kathryn E; Leyrat, Clémence; Nitsch, Dorothea; Douglas, Ian J; Root, Adrian; Williamson, Elizabeth; Smeeth, Liam; Tomlinson, Laurie A; (2018) Trimethoprim use for urinary tract infection and risk of adverse outcomes in older patients: cohort study. BMJ (Clinical research ed), 360. k341-. ISSN 0959-8138 DOI: https://doi.org/10.1136/bmj.k341

Leyrat, Clémence; Caille, Agnès; Eldridge, Sandra; Kerry, Sally; Dechartres, Agnès; Giraudeau, Bruno; (2018) Intervention effect estimates in cluster randomized versus individually randomized trials: a meta-epidemiological study. International Journal of Epidemiology, 48 (2). pp. 609-619. ISSN 0300-5771 DOI: https://doi.org/10.1093/ije/dyy229

Leyrat, Clémence; Morgan, Katy E; Leurent, Baptiste; Kahan, Brennan C; (2018) Response to: How to design and analyse cluster randomized trials with a small number of clusters? Comment on Leyrat et al. International journal of epidemiology, 47 (3). pp. 1001-1002. ISSN 0300-5771 DOI: https://doi.org/10.1093/ije/dyy062

Chan, Claire L; Leyrat, Clémence; Eldridge, Sandra M; (2017) Quality of reporting of pilot and feasibility cluster randomised trials: a systematic review. BMJ open, 7 (11). e016970-. ISSN 2044-6055 DOI: https://doi.org/10.1136/bmjopen-2017-016970

Leyrat, C; Seaman, SR; White, IR; Douglas, I; Smeeth, L; Kim, J; Resche-Rigon, M; Carpenter, JR; Williamson, EJ; (2017) Propensity score analysis with partially observed covariates: How should multiple imputation be used? Statistical methods in medical research. p. 962280217713032. ISSN 0962-2802 DOI: https://doi.org/10.1177/0962280217713032

Leyrat, Clémence; Morgan, Katy E; Leurent, Baptiste; Kahan, Brennan C; (2017) Cluster randomized trials with a small number of clusters: which analyses should be used? International journal of epidemiology, 47 (1). pp. 321-331. ISSN 0300-5771 DOI: https://doi.org/10.1093/ije/dyx169

Caille, A; Kerry, S; Tavernier, E; Leyrat, C; Eldridge, S; Giraudeau, B; (2016) Timeline cluster: a graphical tool to identify risk of bias in cluster randomised trials. BMJ (Clinical research ed), 354. i4291. ISSN 0959-8138 DOI: https://doi.org/10.1136/bmj.i4291

Kahan, Brennan C; Forbes, Gordon; Ali, Yunus; Jairath, Vipul; Bremner, Stephen; Harhay, Michael O; Hooper, Richard; Wright, Neil; Eldridge, Sandra M; Leyrat, Clémence; (2016) Increased risk of type I errors in cluster randomised trials with small or medium numbers of clusters: a review, reanalysis, and simulation study. Trials, 17 (1). 438-. ISSN 1745-6215 DOI: https://doi.org/10.1186/s13063-016-1571-2

Leyrat, Clémence; Caille, Agnès; Foucher, Yohann; Giraudeau, Bruno; (2016) Propensity score to detect baseline imbalance in cluster randomized trials: the role of the c-statistic. BMC medical research methodology, 16 (1). 9-. ISSN 1471-2288 DOI: https://doi.org/10.1186/s12874-015-0100-4

Coleman, Claire; Leyrat, Clemence; Eldridge, Sandra; (2015) The quality of reporting of pilot and feasibility cluster randomised trials: a systematic review. In: 3rd International Clinical Trials Methodology Conference, 16-17 November 2015, Glasgow, UK. DOI: https://doi.org/10.1186/1745-6215-16-S2-P13

Porcher, Raphaël; Leyrat, Clémence; Baron, Gabriel; Giraudeau, Bruno; Boutron, Isabelle; (2015) Performance of principal scores to estimate the marginal compliers causal effect of an intervention. Statistics in medicine, 35 (5). pp. 752-767. ISSN 0277-6715 DOI: https://doi.org/10.1002/sim.6735 Full text not available from this repository.

Caille, Agnès; Leyrat, Clémence; Giraudeau, Bruno; (2014) A comparison of imputation strategies in cluster randomized trials with missing binary outcomes. Statistical methods in medical research, 25 (6). pp. 2650-2669. ISSN 0962-2802 DOI: https://doi.org/10.1177/0962280214530030 Full text not available from this repository.

Leyrat, Clémence; Caille, Agnès; Donner, Allan; Giraudeau, Bruno; (2014) Propensity score methods for estimating relative risks in cluster randomized trials with low-incidence binary outcomes and selection bias. Statistics in medicine, 33 (20). pp. 3556-3575. ISSN 0277-6715 DOI: https://doi.org/10.1002/sim.6185 Full text not available from this repository.

Leyrat, C; Caille, A; Donner, A; Giraudeau, B; (2013) Propensity scores used for analysis of cluster randomized trials with selection bias: a simulation study. Statistics in medicine, 32 (19). pp. 3357-3372. ISSN 0277-6715 DOI: https://doi.org/10.1002/sim.5795 Full text not available from this repository.

Caille, Agnès; Leyrat, Clémence; Giraudeau, Bruno; (2012) Dichotomizing a continuous outcome in cluster randomized trials: impact on power. Statistics in medicine, 31 (24). pp. 2822-2832. ISSN 0277-6715 DOI: https://doi.org/10.1002/sim.5409 Full text not available from this repository.

Giraudeau, Bruno; Leyrat, Clémence; Le Gouge, Amélie; Léger, Julie; Caille, Agnès; (2011) Peer review of grant applications: a simple method to identify proposals with discordant reviews. PloS one, 6 (11). e27557-. ISSN 1932-6203 DOI: https://doi.org/10.1371/journal.pone.0027557