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51

Time-dependent study entries and exposures in cohort studies can easily be sources of different and avoidable types of bias

Wolkewitz, Martin, Allignol, Arthur, Harbarth, Stephan, de Angelis, Giulia, Schumacher, Martin, Beyersmann, Jan

Journal:

Journal of Clinical Epidemiology

Year:

2012

Language:

english

File:

PDF, 291 KB

english, 2012

52

The Time-Dependent Bias and its Effect on Extra Length of Stay due to Nosocomial Infection

Adrian G. Barnett, Jan Beyersmann, Arthur Allignol, Victor D. Rosenthal, Nicholas Graves, Martin Wolkewitz

Journal:

Value in Health

Year:

2011

Language:

english

File:

PDF, 512 KB

english, 2011

53

O083: Prohibit (preventing hospital-acquired infections by intervention and training): preliminary results of a European multi-center study on the effectiveness of a hand hygiene campaign and a central venous catheter bundle

T van der Kooi, M Wolkewitz, B van Benthem…

Journal:

Antimicrobial Resistance and Infection Control

Year:

2013

Language:

english

File:

PDF, 83 KB

english, 2013

54

A retrospective evaluation of teeth restored with zirconia ceramic posts: 10-year results

Maria Bateli, Matthias Kern, Martin Wolkewitz…

Journal:

Clinical Oral Investigations

Year:

2014

Language:

english

File:

PDF, 255 KB

english, 2014

55

Responding to manuscript CLOI-D-10-00562: Reliability of shade selection using an intraoral spectrophotometer

Siegbert Witkowski, Nao-Daniel Yajima, Martin Wolkewitz…

Journal:

Clinical Oral Investigations

Year:

2013

Language:

english

File:

PDF, 67 KB

english, 2013

56

Avoidable statistical pitfalls in analyzing length of stay in intensive care units or hospitals

Wolkewitz, Martin

Journal:

Critical Care (BioMed Central)

Year:

2014

Language:

english

File:

PDF, 98 KB

english, 2014

57

Elution of monomers from three different bonding systems and their antibacterial effect

Olga Polydorou,Philipp Rogatti,Richard Bolek,Martin Wolkewitz…

Journal:

Year:

2013

Language:

english

File:

PDF, 262 KB

english, 2013

58

Marginal and internal fit of heat pressed versus CAD/CAM fabricated all-ceramic onlays after exposure to thermo-mechanical fatigue

Guess, Petra C., Vagkopoulou, Thaleia, Zhang, Yu, Wolkewitz, Martin, Strub, Joerg R.

Journal:

Journal of Dentistry

Year:

2014

Language:

english

File:

PDF, 1.52 MB

english, 2014

59

Pull-out bond strength of a fibre-reinforced composite post system luted with self-adhesive resin cements

Nova, Vassiliki, Karygianni, Lamprini, Altenburger, Markus J., Wolkewitz, Martin, Kielbassa, Andrej M., Wrbas, Karl-Thomas

Journal:

Journal of Dentistry

Year:

2013

Language:

english

File:

PDF, 860 KB

english, 2013

60

Interventions to control nosocomial infections: study designs and statistical issues

Wolkewitz, M., Barnett, A.G., Palomar Martinez, M., Frank, U., Schumacher, M.

Journal:

Journal of Hospital Infection

Year:

2014

Language:

english

File:

PDF, 247 KB

english, 2014

61

Evapotranspiration, pan evaporation and soil water relationships for wheat (Triticum aestivum)

Singh, Pratap, Wolkewitz, Hermann

Journal:

Agricultural Water Management

Year:

1988

Language:

english

File:

PDF, 815 KB

english, 1988

62

Aggressive versus conservative initiation of antibiotics

Wolkewitz, Martin, Tacconelli, Evelina, Schumacher, Martin

Journal:

The Lancet Infectious Diseases

Year:

2013

Language:

english

File:

PDF, 51 KB

english, 2013

63

The Importance of Good Data, Analysis, and Interpretation for Showing the Economics of Reducing Healthcare-Associated Infection •

Nicholas Graves, PhD, Adrian G. Barnett, PhD, Kate Halton, PhD, Christopher Crnich, MD, MS, Ben Cooper, PhD, Jan Beyersmann, PhD, Martin Wolkewitz, PhD, Matthew Samore, MD, Stephan Harbarth, MD, MS

Journal:

Infection Control and Hospital Epidemiology

Year:

2011

Language:

english

File:

PDF, 184 KB

english, 2011

64

Impact of availability of guidelines and active surveillance in reducing the incidence of ventilator-associated pneumonia in Europe and worldwide

Kaier, Klaus, Lambert, Marie-Laurence, Frank, Uwe K, Vach, Werner, Wolkewitz, Martin, Tacconelli, Evelina, Rello, Jordi, Theuretzbacher, Ursula, Martin, Maria

Journal:

BMC Infectious Diseases

Year:

2014

Language:

english

File:

PDF, 319 KB

english, 2014

65

Statistical and methodological concerns about the beneficial effect of neuraminidase inhibitors on mortality

Wolkewitz, Martin, Schumacher, Martin

Journal:

The Lancet Respiratory Medicine

Year:

2014

Language:

english

File:

PDF, 48 KB

english, 2014

66

Interpreting and comparing risks in the presence of competing events

Wolkewitz, M., Cooper, B. S., Bonten, M. J. M., Barnett, A. G., Schumacher, M.

Journal:

Year:

2014

Language:

english

File:

PDF, 1.34 MB

english, 2014

67

Risk factors for the development of nosocomial pneumonia and mortality on intensive care units: application of competing risks models

Martin Wolkewitz,Ralf Peter Vonberg,Hajo Grundmann,Jan Beyersmann…

Journal:

Critical Care (BioMed Central)

Year:

2008

Language:

english

File:

PDF, 294 KB

english, 2008

68

Regression modelling in hospital epidemiology: a statistical note

Martin Wolkewitz,Jan Beyersmann,Petra Gastmeier,Martin Schumacher

Journal:

Critical Care (BioMed Central)

Year:

2008

Language:

english

File:

PDF, 33 KB

english, 2008

69

Evaluation of Guided Bone Regeneration around Oral Implants over Different Healing Times Using Two Different Bovine Bone Materials: A Randomized, Controlled Clinical and Histological Investigation

Kohal, Ralf Joachim, Straub, Lisa Marie, Wolkewitz, Martin, Bächle, Maria, Patzelt, Sebastian Berthold Maximilian

Journal:

Clinical Implant Dentistry and Related Research

Year:

2014

Language:

english

File:

PDF, 866 KB

english, 2014

70

Evaluating mortality in an intensive care unit requires extended survival models

Martin Wolkewitz,Harriet Sommer

Journal:

Critical Care (BioMed Central)

Year:

2014

Language:

english

File:

PDF, 106 KB

english, 2014

71

Alumina reinforced zirconia implants: Effects of cyclic loading and abutment modification on fracture resistance

Spies, Benedikt Christopher, Sauter, Carmen, Wolkewitz, Martin, Kohal, Ralf-Joachim

Journal:

Dental Materials

Year:

2015

Language:

english

File:

PDF, 2.00 MB

english, 2015

72

Nested Case-Control Studies in Cohorts with Competing Events

Wolkewitz, Martin, Cooper, Ben S., Palomar-Martinez, Mercedes, Olaechea-Astigarraga, Pedro, Alvarez-Lerma, Francisco, Schumacher, Martin

Journal:

Year:

2014

Language:

english

File:

PDF, 364 KB

english, 2014

73

Does human saliva decrease the antimicrobial activity of chlorhexidine against oral bacteria?

Abouassi, Thaer, Hannig, Christian, Mahncke, Katja, Karygianni, Lamprini, Wolkewitz, Martin, Hellwig, Elmar, Al-Ahmad, Ali

Journal:

BMC Research Notes

Year:

2014

Language:

english

File:

PDF, 331 KB

english, 2014

74

Clinical Impact of Antimicrobial Resistance in European Hospitals: Excess Mortality and Length of Hospital Stay Related to Methicillin-Resistant Staphylococcus aureus Bloodstream Infections

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. J., Paniara, O., Argyropoulou, A., Bompola, M., Smyt

Journal:

Antimicrobial Agents and Chemotherapy

Year:

2011

Language:

english

File:

PDF, 21 KB

english, 2011

75

Mortality associated with in-hospital bacteraemia caused by Staphylococcus aureus: a multistate analysis with follow-up beyond hospital discharge

Wolkewitz, M., Frank, U., Philips, G., Schumacher, M., Davey, P., Frank, U., Wilson, C., Lawrie-Blum, D., Kaier, K., Schroeren-Boersch, B., Davey, P., Chalkley, M., Heather, D., Ansari, F., Suetens, C

Journal:

Journal of Antimicrobial Chemotherapy

Year:

2011

Language:

english

File:

PDF, 265 KB

english, 2011

76

Clinical Impact of Antimicrobial Resistance in European Hospitals: Excess Mortality and Length of Hospital Stay Related to Methicillin-Resistant Staphylococcus aureus Bloodstream Infections

de Kraker, M. E. A., Wolkewitz, M., Davey, P. G., Grundmann, H.

Journal:

Antimicrobial Agents and Chemotherapy

Year:

2011

Language:

english

File:

PDF, 150 KB

english, 2011

77

Microscope-Based Imaging Platform for Large-Scale Analysis of Oral Biofilms

Karygianni, L., Follo, M., Hellwig, E., Burghardt, D., Wolkewitz, M., Anderson, A., Al-Ahmad, A.

Journal:

Applied and Environmental Microbiology

Year:

2012

Language:

english

File:

PDF, 1.61 MB

english, 2012

78

Two Pitfalls in Survival Analyses of Time-Dependent Exposure: A Case Study in a Cohort of Oscar Nominees

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

Journal:

The American Statistician

Year:

2010

Language:

english

File:

PDF, 207 KB

english, 2010

79

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

Wolkewitz, M., Rothenbacher, D., Low, M., Stegmaier, C., Ziegler, H., Radulescu1, M., Brenner, H., Diepgen, T. L.

Journal:

The Journal of Investigative Dermatology

Year:

2005

Language:

english

File:

PDF, 68 KB

english, 2005

80

Is 27 really a dangerous age for famous musicians? Retrospective cohort study

Wolkewitz, M., Allignol, A., Graves, N., Barnett, A. G.

Journal:

Year:

2011

Language:

english

File:

PDF, 482 KB

english, 2011

81

Occurrence and Causing Stimuli of Postoperative Sensitivity in Composite Restorations

Auschill, T. M., Koch, C. A., Wolkewitz, M., Hellwig, E., Arweiler, N. B.

Journal:

Operative Dentistry

Year:

2009

Language:

english

File:

PDF, 213 KB

english, 2009

82

Estimating the Risk of Ventilator-associated Pneumonia as a Function of Time

Year:

2015

Language:

english

File:

PDF, 426 KB

english, 2015

83

Prospektive randomisierte Studie beim fortgeschrittenen Magenkarzinom: Vergleich der Kombination von 5-Fluorouracil und Carmustin ohne und mit Adriamycin

Queißer, W., Schnitzler, G., Heim, M. E., König, H., Katz, R., Fritze, D., Herrmann, R., Arnold, H., Henß, H., Trux, F., Bloch, R., Keymling, M., Wolkewitz, K. D., Fritsch, H., Hanisch, I., Brumen, L.

Journal:

DMW - Deutsche Medizinische Wochenschrift

Year:

1984

Language:

german

File:

PDF, 1.09 MB

german, 1984

84

Laser acupuncture for depression: A randomised double blind controlled trial using low intensity laser intervention

Quah-Smith, Im, Smith, Caroline, Crawford, John D., Wolkewitz, N.

Journal:

Deutsche Zeitschrift für Akupunktur

Year:

2015

File:

PDF, 301 KB

2015

85

Quantifying the Burden of Hospital-Acquired Bloodstream Infection in Children in England by Estimating Excess Length of Hospital Stay and Mortality Using a Multistate Analysis of Linked, Routinely Collected Data

Green, N., Johnson, A. P., Henderson, K. L., Muller-Pebody, B., Thelwall, S., Robotham, J. V., Sharland, M., Wolkewitz, M., Deeny, S. R.

Journal:

Journal of the Pediatric Infectious Diseases Society

Year:

2015

Language:

english

File:

PDF, 242 KB

english, 2015

86

A full competing risk analysis of hospital-acquired infections could easily be performed by a case-cohort approach

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

Journal:

Journal of Clinical Epidemiology

Year:

2015

Language:

english

File:

PDF, 794 KB

english, 2015

87

Weitzenberg, H.: Wasser- und Boden-Erhaltung in Afrika. Heft 6 der Schriftenreihe zum Handbuch der Entwicklungshilfe. Verlag August Lutzeyer Baden-Baden u. Bonn 1962, 72 Seiten mit 11 Abbildungen und 14 Zeichnungen, broschiert DM 7,90

Journal:

Journal of Plant Nutrition and Soil Science

Year:

1963

Language:

german

File:

PDF, 159 KB

german, 1963

88

Rißbilder trocknender Tone und ihre Deutung

Wolkewitz, Hermann

Journal:

Journal of Plant Nutrition and Soil Science

Year:

1958

Language:

german

File:

PDF, 1.11 MB

german, 1958

89

Sonographie bei Erkrankungen der Leber *

Seufert, C. D., Wolkewitz, K. D.

Journal:

DMW - Deutsche Medizinische Wochenschrift

Year:

1982

Language:

german

File:

PDF, 206 KB

german, 1982

90

Behandlung des pränatal diagnostizierten fetalen Chylothorax

Linder, R., Grumbrecht, C., Stosiek, U., Maier*, W., Wolkewitz**, W.

Journal:

Geburtshilfe und Frauenheilkunde

Year:

1982

Language:

german

File:

PDF, 830 KB

german, 1982

91

Key priorities in the prevention and control of healthcare-associated infection: a survey of European and other international infection prevention experts

Dettenkofer, Markus, Humphreys, Hilary, Saenz, Henri, Carlet, Jean, Hanberger, Håkan, Ruef, Christian, Widmer, Andreas, Wolkewitz, Martin, Cookson, Barry

Journal:

Year:

2016

Language:

english

File:

PDF, 562 KB

english, 2016

92

Analysing outbreak data in a heterogeneous population with migration

Wolkewitz, Martin, Schumacher, Martin

Journal:

IFAC Proceedings Volumes

Year:

2009

Language:

english

File:

PDF, 255 KB

english, 2009

93

Wasserfibel. Ein Ratgeber für die Landwirtschaft in allen Wasserfragen. Arbeiten der DLG, Band 82. DLG-Verlags-GmbH., Frankfurt (Main), 1962, 146 Seiten, 85 Abbildungen, DM 7,80

Journal:

Journal of Plant Nutrition and Soil Science

Year:

1963

Language:

german

File:

PDF, 86 KB

german, 1963

94

Effect of Gabapentin-Lactam and Gamma-Aminobutyric Acid/Lactam Analogs on Proliferation and Phenotype of Ovine Mesenchymal Stem Cells

Sauerbier, Sebastian, Gutwald, Ralf, Wiedmann-Al-Ahmad, Margit, Wolkewitz, Martin, Haberstroh, Jörg, Obermeyer, Julia, Kuenz, Arne, Betz, Helene, Wolter, Franziska, Duttenhoefer, Fabian, Schmelzeisen,

Journal:

The International Journal of Oral & Maxillofacial Implants

Year:

2013

Language:

english

File:

PDF, 357 KB

english, 2013

95

Necessity of a Competing Risk Approach in Risk Factor Analysis of Central Line–Associated Bloodstream Infection

Weber, Susanne, von Cube, Maja, Sommer, Harriet, Wolkewitz, Martin

Journal:

Infection Control and Hospital Epidemiology

Year:

2016

Language:

english

File:

PDF, 240 KB

english, 2016

96

The affect gap in risky choice: Affect-rich outcomes attenuate attention to probability information.

Pachur, Thorsten, Hertwig, Ralph, Wolkewitz, Roland

Journal:

Year:

2014

Language:

english

File:

PDF, 191 KB

english, 2014

97

Multiple time scales in modeling the incidence of infections acquired in intensive care units

Wolkewitz, Martin, Cooper, Ben S., Palomar-Martinez, Mercedes, Alvarez-Lerma, Francisco, Olaechea-Astigarraga, Pedro, Barnett, Adrian G., Schumacher, Martin

Journal:

BMC Medical Research Methodology

Year:

2016

Language:

english

File:

PDF, 762 KB

english, 2016

98

S. aureus colonization at ICU admission as a risk factor for developing S. aureus ICU pneumonia

Paling, Fleur P., Wolkewitz, Martin, Bode, Lonneke G.M., Klein Klouwenberg, Peter M.C., Ong, David S.Y., Depuydt, Pieter, de Bus, Liesbet, Sifakis, Frangiscos, Bonten, Marc J.M., Kluytmans, Jan A.J.W.

Journal:

Clinical Microbiology and Infection

Year:

2016

Language:

english

File:

PDF, 837 KB

english, 2016

99

Estimating the burden of nosocomial infections: Time dependency and cost clustering should be taken into account

Heister, Thomas, Kaier, Klaus, Wolkewitz, Martin

Journal:

American Journal of Infection Control

Year:

2016

Language:

english

File:

PDF, 122 KB

english, 2016

100

RE: “COMPARISON OF STATISTICAL APPROACHES FOR DEALING WITH IMMORTAL TIME BIAS IN DRUG EFFECTIVENESS STUDIES”

Wolkewitz, Martin, Beyersmann, Jan, Ohneberg, Kristin, Schumacher, Martin

Journal:

American Journal of Epidemiology

Year:

2016

Language:

english

File:

PDF, 42 KB

english, 2016