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1

Improving nested case-control studies to conduct a full competing-risks analysis for nosocomial infections

Hazard, Derek, Schumacher, Martin, Palomar-Martinez, Mercedes, Alvarez-Lerma, Francisco, Olaechea-Astigarraga, Pedro, Wolkewitz, Martin

Journal:

Infection Control and Hospital Epidemiology

Year:

2018

Language:

english

File:

PDF, 206 KB

english, 2018

2

Effect of carbamide peroxide and hydrogen peroxide on enamel surface: an in vitro study

Thaer Abouassi, Martin Wolkewitz, Petra Hahn

Journal:

Clinical Oral Investigations

Year:

2011

Language:

english

File:

PDF, 346 KB

english, 2011

3

Influence of preparation design and ceramic thicknesses on fracture resistance and failure modes of premolar partial coverage restorations

Guess, Petra C., Schultheis, Stefan, Wolkewitz, Martin, Zhang, Yu, Strub, Joerg R.

Journal:

The Journal of Prosthetic Dentistry

Year:

2013

Language:

english

File:

PDF, 475 KB

english, 2013

4

Microhardness of Composite Materials With Different Organic Phases in Deep Class II Cavities: An In Vitro Study

Tchorz, JP, Doll, R, Wolkewitz, M, Hellwig, E, Hannig, C

Journal:

Operative Dentistry

Year:

2011

Language:

english

File:

PDF, 705 KB

english, 2011

5

Prevention of hospital infections by intervention and training (PROHIBIT): results of a pan-European cluster-randomized multicentre study to reduce central venous catheter-related bloodstream infections

van der Kooi, Tjallie, Sax, Hugo, Pittet, Didier, van Dissel, Jaap, van Benthem, Birgit, Walder, Bernhard, Cartier, Vanessa, Clack, Lauren, de Greeff, Sabine, Wolkewitz, Martin, Hieke, Stefanie, Boshu

Journal:

Intensive Care Medicine

Year:

2017

Language:

english

File:

PDF, 1.15 MB

english, 2017

6

Infectious disease consultation for candidaemia

Lambert, Jerome, von Cube, Maja, Biard, Lucie, Rieg, Siegbert, Wolkewitz, Martin

Journal:

The Lancet Infectious Diseases

Year:

2020

Language:

english

File:

PDF, 367 KB

english, 2020

7

Statistical Analysis of Clinical COVID-19 Data: A Concise Overview of Lessons Learned, Common Errors and How to Avoid Them

Wolkewitz, Martin, Lambert, Jerome, von Cube, Maja, Bugiera, Lars, Grodd, Marlon, Hazard, Derek, White, Nicole, Barnett, Adrian, Kaier, Klaus

Journal:

Clinical Epidemiology

Year:

2020

File:

PDF, 283 KB

2020

8

The impact of time-dependent bias in proportional hazards modelling

Jan Beyersmann, Martin Wolkewitz, Martin Schumacher

Journal:

Statistics in Medicine

Year:

2008

Language:

english

File:

PDF, 307 KB

english, 2008

9

Health and Economic Impacts of Antibiotic Resistance in European Hospitals – Outlook on the BURDEN Project

K. Kaier, C. Wilson, M. Chalkley, P. G. Davey, C. Suetens, H. Grundmann, M. de Kraker, M. Schumacher, M. Wolkewitz, U. Frank

Journal:

Year:

2008

Language:

english

File:

PDF, 202 KB

english, 2008

10

An easy mathematical proof showed that time-dependent bias inevitably leads to biased effect estimation

Jan Beyersmann, Petra Gastmeier, Martin Wolkewitz, Martin Schumacher

Journal:

Journal of Clinical Epidemiology

Year:

2008

Language:

english

File:

PDF, 239 KB

english, 2008

11

In vivo study of the initial bacterial adhesion on different implant materials

Al-Ahmad, A., Wiedmann-Al-Ahmad, M., Fackler, A., Follo, M., Hellwig, E., Bächle, M., Hannig, C., Han, J.-S., Wolkewitz, M., Kohal, R.

Journal:

Archives of Oral Biology

Year:

2013

Language:

english

File:

PDF, 1.20 MB

english, 2013

12

Bond strength of composite resin to glass ceramic after saliva contamination

Frank Nikolaus, Martin Wolkewitz, Petra Hahn

Journal:

Clinical Oral Investigations

Year:

2013

Language:

english

File:

PDF, 209 KB

english, 2013

13

Burden of antimicrobial resistance in European hospitals: excess mortality and length of hospital stay associated with bloodstream infections due to Escherichia coli resistant to third-generation cephalosporins

de Kraker, M. E. A., Wolkewitz, M., Davey, P. G., Koller, W., Berger, J., Nagler, J., Icket, C., Kalenic, S., Horvatic, J., Seifert, H., Kaasch, A., Paniara, O., Argyropoulou, A., Bompola, M., Smyth,

Journal:

Journal of Antimicrobial Chemotherapy

Year:

2011

Language:

english

File:

PDF, 271 KB

english, 2011

14

Competing risks need to be considered in survival analysis models for cardiovascular outcomes

Huebner, Marianne, Wolkewitz, Martin, Enriquez-Sarano, Maurice, Schumacher, Martin

Journal:

The Journal of Thoracic and Cardiovascular Surgery

Year:

2017

Language:

english

File:

PDF, 435 KB

english, 2017

15

Simulation shows undesirable results for competing risks analysis with time-dependent covariates for clinical outcomes

Poguntke, Inga, Schumacher, Martin, Beyersmann, Jan, on behalf of COMBACTE-MAGNET Consor, Martin Wolkewitz

Journal:

BMC Medical Research Methodology

Year:

2018

Language:

english

File:

PDF, 618 KB

english, 2018

16

Sublocalization of putative tumor suppressor gene loci on chromosome arm 14q in neuroblastoma

Marco Theobald, Holger Christiansen, Anke Schmidt, Badrig Melekian, Nicole Wolkewitz, Nina M. Christiansen, Christian Brinkschmidt, Frank Berthold, Fritz Lampert

Journal:

Genes, Chromosomes and Cancer

Year:

1999

Language:

english

File:

PDF, 177 KB

english, 1999

17

S43.5: Lifetime prevalence of atopic diseases in a population-based sample of an elderly population: results of the ESTHER-study

Martin Wolkewitz, Dietrich Rothenbacher, Michael Löw, Christa Stegmaier, Hartwig Ziegler, Magda Radulescu, Herrmann Brenner, Thomas L. Diepgen

Journal:

Biometrical Journal

Year:

2004

Language:

english

File:

PDF, 76 KB

english, 2004

18

Application of multistate models in hospital epidemiology: Advances and challenges

Jan Beyersmann, Martin Wolkewitz, Arthur Allignol, Nadine Grambauer, Martin Schumacher

Journal:

Biometrical Journal

Year:

2011

Language:

english

File:

PDF, 302 KB

english, 2011

19

Biofilm formation and composition on different implant materials in vivo

A. Al-Ahmad, M. Wiedmann-Al-Ahmad, J. Faust, M. Bächle, M. Follo, M. Wolkewitz, C. Hannig, E. Hellwig, C. Carvalho, R. Kohal

Journal:

Journal of Biomedical Materials Research Part B: Applied Biomaterials

Year:

2010

Language:

english

File:

PDF, 511 KB

english, 2010

20

The effect of storage medium on the elution of monomers from composite materials

Olga Polydorou, Catherine Huberty, Martin Wolkewitz, Richard Bolek, Elmar Hellwig, Klaus Kümmerer

Journal:

Journal of Biomedical Materials Research Part B: Applied Biomaterials

Year:

2012

Language:

english

File:

PDF, 386 KB

english, 2012

21

Risk factors disrupting mucosal integrity and subsequent vancomycin-resistant enterococcus infection

Jan Beyersmann, Jörg Meerpohl, Markus Dettenkofer, Martin Wolkewitz, Martin Schumacher

Journal:

Pediatric Blood & Cancer

Year:

2010

Language:

english

File:

PDF, 27 KB

english, 2010

22

Statistical epidemic modeling with hospital outbreak data

M. Wolkewitz, M. Dettenkofer, H. Bertz, M. Schumacher, J. Huebner

Journal:

Statistics in Medicine

Year:

2008

Language:

english

File:

PDF, 148 KB

english, 2008

23

Comparative performance of different crop production functions for wheat (Triticum aestivumL.)

Pratap Singh, Hermann Wolkewitz, Ranvir Kumar

Journal:

Irrigation Science

Year:

1987

Language:

english

File:

PDF, 971 KB

english, 1987

24

Modeling the effect of time-dependent exposure on intensive care unit mortality

Martin Wolkewitz, Jan Beyersmann, Petra Gastmeier, Martin Schumacher

Journal:

Intensive Care Medicine

Year:

2009

Language:

english

File:

PDF, 259 KB

english, 2009

25

A note on statistical association and causality derived from epidemiological ICU data

Martin Wolkewitz, Jan Beyersmann, Martin Schumacher

Journal:

Intensive Care Medicine

Year:

2010

Language:

english

File:

PDF, 107 KB

english, 2010

26

Change in diet and oral hygiene over an 8-week period: effects on oral health and oral biofilm

Ali Al-Ahmad, Dominik Roth, Martin Wolkewitz, Margit Wiedmann-Al-Ahmad, Marie Follo, Petra Ratka-Krüger, Daniela Deimling, Elmar Hellwig, Christian Hannig

Journal:

Clinical Oral Investigations

Year:

2010

Language:

english

File:

PDF, 166 KB

english, 2010

27

Human saliva exposure modulates bone cell performance in vitro

Susanne Proksch, Thorsten Steinberg, Constantin Keller, Martin Wolkewitz, Margit Wiedmann-Al-Ahmad, Guenter Finkenzeller, Christian Hannig, Elmar Hellwig, Ali Al-Ahmad

Journal:

Clinical Oral Investigations

Year:

2012

Language:

english

File:

PDF, 578 KB

english, 2012

28

Participation and Priorities: An Assessment of Developing Countries Concerns in the Trade/Environment Interface

Beatrice Chaytor, Mathias Wolkewitz

Journal:

Review of European Community & International Environmental Law

Year:

1997

Language:

english

File:

PDF, 245 KB

english, 1997

29

LIFETIME PREVALENCE OF ATOPIC DISEASES IN A POPULATION-BASED SAMPLE OF AN ELDERLY POPULATION: RESULTS OF THE ESTHER-STUDY

Wolkewitz, M, Rothenbacher, D, Löw, M, Stegmaier, C, Ziegler, H, Radulescu, M, Brenner, H, Diepgen, TL

Journal:

The Journal of Investigative Dermatology

Year:

2005

Language:

english

File:

PDF, 66 KB

english, 2005

30

Lifetime prevalence of self-reported atopic diseases in a population-based sample of elderly subjects: results of the ESTHER study

M. Wolkewitz, D. Rothenbacher, M. Löw, C. Stegmaier, H. Ziegler, M. Radulescu, H. Brenner, T.L. Diepgen

Journal:

British Journal of Dermatology

Year:

2007

Language:

english

File:

PDF, 289 KB

english, 2007

31

Cleanliness of dentinal tubules following gutta-percha removal with and without solvents: a scanning electron microscopic study

S. D. Horvath, M. J. Altenburger, M. Naumann, M. Wolkewitz, J. F. Schirrmeister

Journal:

International Endodontic Journal

Year:

2009

Language:

english

File:

PDF, 209 KB

english, 2009

32

Results of a prospective randomized controlled trial of posterior ZrSiO4-ceramic crowns

B. S. ENCKE, G. HEYDECKE, M. WOLKEWITZ, J. R. STRUB

Journal:

Journal of Oral Rehabilitation

Year:

2009

Language:

english

File:

PDF, 180 KB

english, 2009

33

Biomechanical and histological behavior of zirconia implants: an experiment in the rat

Ralf J. Kohal, Martin Wolkewitz, Marc Hinze, Jung-Suk Han, Maria Bächle, Frank Butz

Journal:

Clinical Oral Implants Research

Year:

2009

Language:

english

File:

PDF, 1.19 MB

english, 2009

34

Alumina-reinforced zirconia implants: survival rate and fracture strength in a masticatory simulation trial

Ralf-J. Kohal, Martin Wolkewitz, Constanze Mueller

Journal:

Clinical Oral Implants Research

Year:

2010

Language:

english

File:

PDF, 547 KB

english, 2010

35

The effects of cyclic loading and preparation on the fracture strength of zirconium-dioxide implants: an in vitro investigation

Ralf J. Kohal, Martin Wolkewitz, Anastasia Tsakona

Journal:

Clinical Oral Implants Research

Year:

2011

Language:

english

File:

PDF, 428 KB

english, 2011

36

Patient ratings of chewing ability from a randomised crossover trial: lingualised vs. first premolar/canine-guided occlusion for complete dentures

Guido Heydecke, Ahmed Shadi Akkad, Martin Wolkewitz, Michael Vogeler, Jens C. Türp, Joerg R. Strub

Journal:

Year:

2007

Language:

english

File:

PDF, 530 KB

english, 2007

37

Enterococcus faecalisaffects the proliferation and differentiation of ovine osteoblast-like cells

Karygianni, Lamprini, Wiedmann-Al-Ahmad, Margit, Finkenzeller, Günter, Sauerbier, Sebastian, Wolkewitz, Martin, Hellwig, Elmar, Al-Ahmad, Ali

Journal:

Clinical Oral Investigations

Year:

2012

Language:

english

File:

PDF, 468 KB

english, 2012

38

Reliability of shade selection using an intraoral spectrophotometer

Witkowski, Siegbert, Yajima, Nao-Daniel, Wolkewitz, Martin, Strub, Jorge R.

Journal:

Clinical Oral Investigations

Year:

2012

Language:

english

File:

PDF, 214 KB

english, 2012

39

Implementing strategic bundles for infection prevention and management

K. Kaier, C. Wilson, M. Hulscher, H. Wollersheim, A. Huis, M. Borg, E. Scicluna, M.-L. Lambert, M. Palomar, E. Tacconelli, G. De Angelis, M. Schumacher, M. Wolkewitz, E.-M. Kleissle, U. Frank

Journal:

Year:

2012

Language:

english

File:

PDF, 176 KB

english, 2012

40

Simulating and analysing infectious disease data in a heterogeneous population with migration

Martin Wolkewitz, Martin Schumacher

Journal:

Computer Methods and Programs in Biomedicine

Year:

2011

Language:

english

File:

PDF, 851 KB

english, 2011

41

Shear bond strengths between different zirconia cores and veneering ceramics and their susceptibility to thermocycling

Petra C. Guess, Andreja Kuliš, Siegbert Witkowski, Martin Wolkewitz, Yu Zhang, Jörg R. Strub

Journal:

Dental Materials

Year:

2008

Language:

english

File:

PDF, 470 KB

english, 2008

42

Extended-spectrum β-lactamase-producing Enterobacter cloacae in mobile dialysis units in the medical and surgical departments of a university hospital: a case–control study

E.-B. Kruse, A. Conrad, S. Wenzler-Röttele, D. Jonas, M. Dettenkofer, M. Wolkewitz, E. Meyer, A. Serr

Journal:

Journal of Hospital Infection

Year:

2010

Language:

english

File:

PDF, 142 KB

english, 2010

43

Multistate modelling to estimate the excess length of stay associated with meticillin-resistant Staphylococcus aureus colonisation and infection in surgical patients

G. De Angelis, A. Allignol, A. Murthy, M. Wolkewitz, J. Beyersmann, E. Safran, J. Schrenzel, D. Pittet, S. Harbarth

Journal:

Journal of Hospital Infection

Year:

2011

Language:

english

File:

PDF, 182 KB

english, 2011

44

Influence of Preparation and Wall Thickness on the Resistance to Fracture of Zirconia Implant Abutments

Wael Att, Nao-Daniel Yajima, Martin Wolkewitz, Siegbert Witkowski, Joerg Rudolf Strub

Journal:

Clinical Implant Dentistry and Related Research

Year:

2012

Language:

english

File:

PDF, 551 KB

english, 2012

45

All-ceramic partial coverage restorations—Midterm results of a 5-year prospective clinical splitmouth study

Petra C. Guess, Joerg R. Strub, Niclas Steinhart, Martin Wolkewitz, Christian F.J. Stappert

Journal:

Journal of Dentistry

Year:

2009

Language:

english

File:

PDF, 331 KB

english, 2009

46

Paediatric hospital-acquired bacteraemia in developing countries

Martin Wolkewitz, Susanna Di Termini, Ben Cooper, Joerg Meerpohl, Martin Schumacher

Journal:

Year:

2012

Language:

english

File:

PDF, 88 KB

english, 2012

47

Clinical outcomes of health-care-associated infections and antimicrobial resistance in patients admitted to European intensive-care units: a cohort study

Marie-Laurence Lambert, Carl Suetens, Anne Savey, Mercedes Palomar, Michael Hiesmayr, Ingrid Morales, Antonella Agodi, Uwe Frank, Karl Mertens, Martin Schumacher, Martin Wolkewitz

Journal:

The Lancet Infectious Diseases

Year:

2011

Language:

english

File:

PDF, 165 KB

english, 2011

48

Clinical impact of antimicrobial resistance: design matters – Authors' reply

Marie-Laurence Lambert, Carl Suetens, Uwe Frank, Martin Wolkewitz

Journal:

The Lancet Infectious Diseases

Year:

2011

Language:

english

File:

PDF, 44 KB

english, 2011

49

Treatment of hospital-acquired pneumonia

Martin Wolkewitz, Ben Cooper, Adrian G Barnett, Nadine Binder, Martin Schumacher

Journal:

The Lancet Infectious Diseases

Year:

2011

Language:

english

File:

PDF, 58 KB

english, 2011

50

Efficacy of tooth bleaching with and without light activation and its effect on the pulp temperature: an in vitro study

Hahn, Petra, Schondelmaier, Nina, Wolkewitz, Martin, Altenburger, Markus Jörg, Polydorou, Olga

Journal:

Year:

2013

Language:

english

File:

PDF, 195 KB

english, 2013

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