Martin Wolkewitz, Mercedes Palomar-Martinez, Francisco Alvarez-Lerma, Pedro Olaechea-Astigarraga, and Martin Schumacher, "Analyzing the impact of duration of ventilation, hospitalization, and ventilation episodes on the risk of pneumonia", Infection Control and Hospital Epidemiology, vol. 40, no. 3, pp. 301-306, Mar. 2019.
M. K. von Cube, J. F. Timsit, H. Sommer, M. Darmon, C. Schwebel, S. Bailly, B. Souweine, and M. Wolkewitz, "Relative risk and population-attributable fraction of ICU death caused by susceptible and resistant Pseudomonas aeruginosa ventilator-associated pneumonia: a competing risks approach to investigate the OUTCOMEREA database", Intensive Care Med, vol. 44, no. 7, pp. 1177-1179, 07 2018.
Martin Wolkewitz, Micha Mandel, Mercedes Palomar-Martinez, Francisco Alvarez-Lerma, Pedro Olaechea-Astigarraga, and Martin Schumacher, "Methodological challenges in using point-prevalence versus cohort data in risk factor analyses of nosocomial infections", Annals of epidemiology, vol. 28, no. 7, pp. 475-480, Elsevier, 2018.
Shahina Rahman, Maja von Cube, Martin Schumacher, and Martin Wolkewitz, "Bias due to censoring of deaths when calculating extra length of stay for patients acquiring a hospital infection", BMC medical research methodology, vol. 18, no. 1, BioMed Central, 2018.
Derek Hazard, Martin Schumacher, Mercedes Palomar-Martinez, Francisco Alvarez-Lerma, Pedro Olaechea-Astigarraga, and Martin Wolkewitz, "Improving nested case-control studies to conduct a full competing-risks analysis for nosocomial infections", Infection Control and Hospital Epidemiology, vol. 39, no. 10, pp. 1196-1201, Cambridge University Press, 2018.
M. Wolkewitz, M. Zortel, M. Palomar-Martinez, F. Alvarez-Lerma, P. Olaechea-Astigarraga, and M. Schumacher, "Landmark prediction of nosocomial infection risk to disentangle short- and long-stay patients", J. Hosp. Infect., vol. 96, no. 1, pp. 81-84, May 2017.
M. Wolkewitz, M. von Cube, and M. Schumacher, "Multistate Modeling to Analyze Nosocomial Infection Data: An Introduction and Demonstration", Infection Control and Hospital Epidemiology, pp. 1-7, June 2017.
M. Huebner, M. Wolkewitz, M. Enriquez-Sarano, and M. Schumacher, "Competing risks need to be considered in survival analysis models for cardiovascular outcomes", J. Thorac. Cardiovasc. Surg., vol. 153, no. 6, pp. 1427-1431, June 2017.
M. von Cube, M. Schumacher, and M. Wolkewitz, "Basic parametric analysis for a multi-state model in hospital epidemiology", Bmc Medical Research Methodology, vol. 17, no. 1, July 2017.
M. von Cube, M. Schumacher, M. Palomar-Martinez, P. Olaechea-Astigarraga, F. Alvarez-Lerma, and M. Wolkewitz, "A case-cohort approach for multi-state models in hospital epidemiology", Stat Med, vol. 36, no. 3, pp. 481-495, Feb. 2017.
M. Wolkewitz and M. Schumacher, "Survival biases lead to flawed conclusions in observational treatment studies of influenza patients", Journal of Clinical Epidemiology, vol. 84, pp. 121-129, Apr. 2017.
M. Wolkewitz, B. S. Cooper, M. Palomar-Martinez, F. Alvarez-Lerma, P. Olaechea-Astigarraga, A. G. Barnett, and M. Schumacher, "Multiple time scales in modeling the incidence of infections acquired in intensive care units", BMC Med Res Methodol, vol. 16, no. 1, Sep. 2016.
M. Wolkewitz, B. S. Cooper, M. Palomar-Martinez, F. Alvarez-Lerma, P. Olaechea-Astigarraga, A. G. Barnett, and M. Schumacher, "Multiple time scales in modeling the incidence of infections acquired in intensive care units", Bmc Medical Research Methodology, vol. 16, no. 1, Sep. 2016.
M. Wolkewitz, M. Palomar-Martinez, P. Olaechea-Astigarraga, F. Alvarez-Lerma, and M. Schumacher, "A full competing risk analysis of hospital-acquired infections can easily be performed by a case-cohort approach", Journal of Clinical Epidemiology, vol. 74, pp. 187-193, June 2016.
M. Wolkewitz, B. S. Cooper, M. Palomar-Martinez, P. Olaechea-Astigarraga, F. Alvarez-Lerma, and M. Schumacher, "Nested case-control studies in cohorts with competing events", Epidemiology, vol. 25, no. 1, pp. 122-125, Jan. 2014.
M. Wolkewitz, A. G. Barnett, M. Palomar Martinez, U. Frank, and M. Schumacher, "Interventions to control nosocomial infections: study designs and statistical issues", J. Hosp. Infect., vol. 86, no. 2, pp. 77-82, Feb. 2014.
M. Wolkewitz, B. S. Cooper, M. Palomar-Martinez, F. Alvarez-Lerma, P. Olaechea-Astigarraga, A. G. Barnett, S. Harbarth, and M. Schumacher, "Multilevel competing risk models to evaluate the risk of nosocomial infection", Crit Care, vol. 18, no. 2, Apr. 2014.
Martin Wolkewitz, Ben S Cooper, Marc JM Bonten, Adrian G Barnett, Martin Schumacher, and others, "Interpreting and comparing risks in the presence of competing events", BMJ, vol. 349, BMJ Publishing Group Ltd, 2014.
Martin Schumacher, Arthur Allignol, Jan Beyersmann, Nadine Binder, and Martin Wolkewitz, "Hospital-acquired infections-appropriate statistical treatment is urgently needed!", International Journal of Epidemiology, vol. 42, no. 5, pp. 1502-1508, Oct. 2013.
M. Wolkewitz, A. Allignol, S. Harbarth, G. de Angelis, M. Schumacher, and J. Beyersmann, "Time-dependent study entries and exposures in cohort studies can easily be sources of different and avoidable types of bias", Journal of Clinical Epidemiology, vol. 65, no. 11, pp. 1171 - 1180, 2012.
M. Wolkewitz and M. Schumacher, "Simulating and analysing infectious disease data in a heterogeneous population with migration", Computer Methods and Programs in Biomedicine., vol. 104, no. 2, pp. 29-36, Nov. 2011.
J. Beyersmann, M. Wolkewitz, A. Allignol, N. Grambauer, and M. Schumacher, "Application of multistate models in hospital epidemiology: advances and challenges", Biometrical Journal, vol. 53, no. 2, pp. 332-350, Mar. 2011.
A. G. Barnett, J. Beyersmann, A. Allignol, V. D. Rosenthal, N. Graves, and M. Wolkewitz, "The time-dependent bias and its effect on extra length of stay due to nosocomial infection", Value Health, vol. 14, no. 2, pp. 381-386, 2011.
M. Wolkewitz, A. Allignol, M. Schumacher, and J. Beyersmann, "Two Pitfalls in Survival Analyses of Time-Dependent Exposure: A Case Study in a Cohort of Oscar Nominees", American Statistician, vol. 64, no. 3, pp. 205-211, ASA, 2010.
M. Wolkewitz, J. Beyersmann, P. Gastmeier, and M. Schumacher, "Efficient risk set sampling when a time-dependent exposure is present: matching for time to exposure versus exposure density sampling", Methods of Information in Medicine, vol. 48, pp. 438-443, 2009.
M. Wolkewitz, M. Dettenkofer, H. Bertz, M. Schumacher, and J. Huebner, "Statistical epidemic modeling with hospital outbreak data", Stat Med, vol. 27, pp. 6522-6531, Dec. 2008.