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; Mansfield, Kathryn; Nitsch, Dorothea; Iwagami, Masao; Leyrat, Clemence; Johnston, Rosalynd; Smeeth, Liam; Tomlinson, Laurie; (2020) The effect of initiation of renin–angiotensin system inhibitors on haemoglobin: A national cohort study. British Journal of Clinical Pharmacology, 87 (2). pp. 1-10. 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 Missing Data in Marginal Structural Models: What Works and Why. American journal of epidemiology. ISSN 0002-9262 DOI: https://doi.org/10.1093/aje/kwaa225

Maringe, Camille; Benitez Majano, Sara; Exarchakou, Aimilia; Smith, Matthew; Rachet, Bernard; Belot, Aurelien; Leyrat, Clémence; (2020) A tutorial on trial emulation in the presence of immortal-time bias. Assessing the benefit of major surgery for elderly lung cancer patients using observational data. International Journal of Epidemiology. ISSN 0300-5771 https://researchonline.lshtm.ac.uk/id/eprint/4656339 (In Press) Item availability may be restricted.

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

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. ISSN 0300-5771 DOI: https://doi.org/10.1093/ije/dyaa225 (In Press) Item availability may be restricted.

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 Item availability may be restricted.

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