Olaf Gefeller

Summary

Affiliation: University of Erlangen-Nuremberg
Country: Germany

Publications

  1. doi request reprint Patch test results with metals and meteorological conditions
    Janice Hegewald
    Department of Medical Informatics, Biometry and Epidemiology, Friedrich Alexander University Erlangen Nurnberg, Erlangen, Germany
    Int Arch Allergy Immunol 147:235-40. 2008
  2. ncbi request reprint The relation between patterns of vacation sun exposure and the development of acquired melanocytic nevi in German children 6-7 years of age
    Olaf Gefeller
    Department of Medical Informatics, Biometry, and Epidemiology, University of Erlangen Nuremberg, Erlangen, Germany
    Am J Epidemiol 165:1162-9. 2007
  3. doi request reprint Invited commentary: Recall bias in melanoma -- much ado about almost nothing?
    Olaf Gefeller
    Department of Medical Informatics, Biometry, and Epidemiology, University of Erlangen Nuremberg, Erlangen, Germany
    Am J Epidemiol 169:267-70; discussion 271-2. 2009
  4. ncbi request reprint Sunscreen use and melanoma: a case of evidence-based prevention?
    Olaf Gefeller
    Department of Medical Informatics, Biometry and Epidemiology, University of Erlangen Nuremberg, Waldstrasse 6, D 91054 Erlangen, Germany
    Photodermatol Photoimmunol Photomed 18:153-6; discussion 156. 2002
  5. ncbi request reprint Meteorological conditions and the diagnosis of occupationally related contact sensitizations
    Janice Hegewald
    Department of Medical Informatics, Biometry and Epidemiology, Friedrich Alexander University Erlangen Nurnberg, Waldstrasse 6, Erlangen, Germany
    Scand J Work Environ Health 34:316-21. 2008
  6. doi request reprint Methylchloroisothiazolinone/methylisothiazolinone contact sensitization: diverging trends in subgroups of IVDK patients in a period of 19 years
    Wolfgang Uter
    Department of Medical Informatics, University of Erlangen Nurnberg, D 91054 Erlangen, Germany
    Contact Dermatitis 67:125-9. 2012
  7. doi request reprint Changes of the patch test population (MOAHLFA index) in long-term participants of the Information Network of Departments of Dermatology, 1999-2006
    Wolfgang Uter
    Department of Medical Informatics, Biometry and Epidemiology, University of Erlangen Nurnberg, D 91054 Erlangen, Germany
    Contact Dermatitis 59:56-7. 2008
  8. ncbi request reprint The validity of rating patch test reactions based on digital images
    Wolfgang Uter
    Department of Medical Informatics, Biometry and Epidemiology, University of Erlangen Nurnberg, Erlangen, Germany
    Contact Dermatitis 57:337-42. 2007
  9. doi request reprint Seasonality of cutaneous melanoma diagnoses: a comprehensive comparison of results in Bavaria and Northern Ireland
    Andrea K Keller
    Department of Medical Informatics, Biometry and Epidemiology, Friedrich Alexander University Erlangen Nuremberg, Erlangen, Germany
    Melanoma Res 23:321-30. 2013
  10. doi request reprint Parental perspective on sun protection for young children in Bavaria
    Jiang Li
    Department of Medical Informatics, Biometry and Epidemiology, Friedrich Alexander University of Erlangen Nuremberg, Erlangen, Germany
    Photodermatol Photoimmunol Photomed 27:196-202. 2011

Detail Information

Publications40

  1. doi request reprint Patch test results with metals and meteorological conditions
    Janice Hegewald
    Department of Medical Informatics, Biometry and Epidemiology, Friedrich Alexander University Erlangen Nurnberg, Erlangen, Germany
    Int Arch Allergy Immunol 147:235-40. 2008
    ..We aimed to investigate how patch test reactions to these metals relate to outdoor temperature and humidity at the time of testing...
  2. ncbi request reprint The relation between patterns of vacation sun exposure and the development of acquired melanocytic nevi in German children 6-7 years of age
    Olaf Gefeller
    Department of Medical Informatics, Biometry, and Epidemiology, University of Erlangen Nuremberg, Erlangen, Germany
    Am J Epidemiol 165:1162-9. 2007
    ..This observation supports the hypothesis that intermittent exposure to high doses of ultraviolet radiation plays an especially important role in nevus development...
  3. doi request reprint Invited commentary: Recall bias in melanoma -- much ado about almost nothing?
    Olaf Gefeller
    Department of Medical Informatics, Biometry, and Epidemiology, University of Erlangen Nuremberg, Erlangen, Germany
    Am J Epidemiol 169:267-70; discussion 271-2. 2009
    ..Their findings cannot be used as an argument that future case-control studies in melanoma epidemiology should be avoided because of the biasing effect of recall bias...
  4. ncbi request reprint Sunscreen use and melanoma: a case of evidence-based prevention?
    Olaf Gefeller
    Department of Medical Informatics, Biometry and Epidemiology, University of Erlangen Nuremberg, Waldstrasse 6, D 91054 Erlangen, Germany
    Photodermatol Photoimmunol Photomed 18:153-6; discussion 156. 2002
    ..A preventive effect of sunscreens on melanoma development is still subject of intense discussion. The practical consequences for changes in public health campaigns are neglected in this debate...
  5. ncbi request reprint Meteorological conditions and the diagnosis of occupationally related contact sensitizations
    Janice Hegewald
    Department of Medical Informatics, Biometry and Epidemiology, Friedrich Alexander University Erlangen Nurnberg, Waldstrasse 6, Erlangen, Germany
    Scand J Work Environ Health 34:316-21. 2008
    ..The present analysis aims at quantifying the possible impact of temperature and humidity on patch-test reactions to occupationally related allergens...
  6. doi request reprint Methylchloroisothiazolinone/methylisothiazolinone contact sensitization: diverging trends in subgroups of IVDK patients in a period of 19 years
    Wolfgang Uter
    Department of Medical Informatics, University of Erlangen Nurnberg, D 91054 Erlangen, Germany
    Contact Dermatitis 67:125-9. 2012
    ..The preservative methylchloroisothiazolinone (MCI)/methylisothiazo- linone (MI) is an important allergen, and has thus been subject to regulation in some areas of exposure, mainly in cosmetics...
  7. doi request reprint Changes of the patch test population (MOAHLFA index) in long-term participants of the Information Network of Departments of Dermatology, 1999-2006
    Wolfgang Uter
    Department of Medical Informatics, Biometry and Epidemiology, University of Erlangen Nurnberg, D 91054 Erlangen, Germany
    Contact Dermatitis 59:56-7. 2008
  8. ncbi request reprint The validity of rating patch test reactions based on digital images
    Wolfgang Uter
    Department of Medical Informatics, Biometry and Epidemiology, University of Erlangen Nurnberg, Erlangen, Germany
    Contact Dermatitis 57:337-42. 2007
    ..The proper reading of patch test (PT) reactions, based on morphological criteria, is of utmost importance. Digital images are increasingly used for medical training...
  9. doi request reprint Seasonality of cutaneous melanoma diagnoses: a comprehensive comparison of results in Bavaria and Northern Ireland
    Andrea K Keller
    Department of Medical Informatics, Biometry and Epidemiology, Friedrich Alexander University Erlangen Nuremberg, Erlangen, Germany
    Melanoma Res 23:321-30. 2013
    ..Hence, in contrast to the data of, and to the interpretation by, Chaillol and colleagues, an effect of ultraviolet radiation on melanoma progression from thin to thick cannot be excluded...
  10. doi request reprint Parental perspective on sun protection for young children in Bavaria
    Jiang Li
    Department of Medical Informatics, Biometry and Epidemiology, Friedrich Alexander University of Erlangen Nuremberg, Erlangen, Germany
    Photodermatol Photoimmunol Photomed 27:196-202. 2011
    ..Exposure to ultraviolet (UV) radiation is the most important modifiable risk factor for skin cancer. Parents are responsible for sun protection of their young children and thus their knowledge and attitudes should be assessed...
  11. ncbi request reprint Contact allergy in construction workers: results of a multifactorial analysis
    Wolfgang Uter
    Department of Medical Informatics, Biometry and Epidemiology, Friedrich Alexander University Erlangen Nurnberg, Waldstrasse 6, 91054 Erlangen, Germany
    Ann Occup Hyg 48:21-7. 2004
    ....
  12. doi request reprint Assessment of multiple ordinal endpoints
    Lothar Haberle
    Department of Medical Informatics, Biometry and Epidemiology, University Erlangen Nuremberg, Germany
    Biom J 51:217-26. 2009
    ..Our goal is discussing differences between the approaches and disclosing possible statistical consequences of their usage...
  13. pmc Contact allergy to thiurams: multifactorial analysis of clinical surveillance data collected by the IVDK network
    Wolfgang Uter
    Department of Medical Informatics, Biometry and Epidemiology, University of Erlangen Nurnberg, Waldstr 6, 91054 Erlangen, Germany
    Int Arch Occup Environ Health 83:675-81. 2010
    ..To analyse the association between occupation (represented by job title) and contact allergy to thiuram vulcanising agents based on data of a clinical registry (IVDK, www.ivdk.org )...
  14. doi request reprint Anxiety and depression in bariatric surgery patients: a prospective, follow-up study using structured clinical interviews
    Martina de Zwaan
    Department of Psychosomatic Medicine and Psychotherapy, University of Erlangen Nuremberg, Erlangen, Germany
    J Affect Disord 133:61-8. 2011
    ..Candidates for bariatric surgery frequently have co-morbid psychiatric problems...
  15. doi request reprint SURVSOFT-Software for nonparametric survival analysis
    Karla Geiss
    Population Based Cancer Registry Bavaria, Registry Office, Erlangen, Germany
    Comput Methods Programs Biomed 96:63-71. 2009
    ..SURVSOFT produces high-resolution graphs, which can be printed, saved or exported to be used with standard graphics editors. The use of SURVSOFT is illustrated by the analysis of survival data from the Bavarian Cancer Registry...
  16. ncbi request reprint Onset of action of levetiracetam: a RCT trial using therapeutic intensive seizure analysis (TISA)
    Hermann Stefan
    Epilepsy Center Erlangen, Department of Neurology, University of Erlangen Nurnberg, Erlangen, Germany
    Epilepsia 47:516-22. 2006
    ..To correlate the onset of clinical effects of add-on levetiracetam (LEV) therapy with daily serum LEV concentration, in pharmaco-resistant focal epilepsies, using the TISA method...
  17. ncbi request reprint Randomized trial of acupuncture to lower blood pressure
    Frank A Flachskampf
    Med Klinik 2, Universitatsklinikum Erlangen, Ulmenweg 18, 91054 Erlangen, Germany
    Circulation 115:3121-9. 2007
    ..Pharmacological treatment has limitations resulting from drug side effects, costs, and patient compliance. Thus, we investigated whether traditional Chinese medicine acupuncture is able to lower blood pressure...
  18. doi request reprint Risk factors associated with sensitization to hydroxyisohexyl 3-cyclohexene carboxaldehyde
    Wolfgang Uter
    Department of Medical Informatics, Biometry and Epidemiology, University of Erlangen Nurnberg, Erlangen, D 91054, Germany
    Contact Dermatitis 69:72-7. 2013
    ..Hydroxyisohexyl 3-cyclohexene carboxaldehyde (HICC) is a synthetic fragrance chemical and an important contact allergen, at least in Europe. Despite this importance, little is known about risk factors associated with this allergen...
  19. ncbi request reprint The association between ambient air conditions (temperature and absolute humidity), irritant sodium lauryl sulfate patch test reactions and patch test reactivity to standard allergens
    Wolfgang Uter
    Department of Medical Informatics, Biometry and Epidemiology IMBE, University of Erlangen Nurnberg, Erlangen, Germany
    Contact Dermatitis 49:97-102. 2003
    ..In conclusion, meteorological conditions and SLS reactivity independently contribute information on individual irritability at the time of patch testing, and both should be considered...
  20. ncbi request reprint Generalized approaches to partitioning the attributable risk of interacting risk factors can remedy existing pitfalls
    Christina Rabe
    Department of Medical Informatics, Biometry and Epidemiology, University of Erlangen Nuremberg, Waldstrasse 6, 91054 Erlangen, Germany
    J Clin Epidemiol 60:461-8. 2007
    ..To clarify the properties of different approaches to estimate the contribution of single-risk factors to the disease load in a population...
  21. ncbi request reprint Guidelines for the descriptive presentation and statistical analysis of contact allergy data
    Wolfgang Uter
    Department of Medical Informatics, Biometry and Epidemiology, University of Erlangen Nurnberg, Erlangen, Germany
    Contact Dermatitis 51:47-56. 2004
    ..With increasing complexity of statistical description and analysis, consulting with a biostatistician is often mandatory...
  22. doi request reprint What can be learnt from nothing? - A statistical perspective
    Olaf Gefeller
    Department of Medical Informatics, Biometry and Epidemiology, University of Erlangen Nurnberg, 91054, Erlangen, Germany
    Contact Dermatitis 69:350-4. 2013
    ..The interpretation of such findings depends critically on the sample size (n) of the investigation, and is statistically addressed by the use of confidence intervals (CIs)...
  23. ncbi request reprint Inverse association between melanoma and previous vaccinations against tuberculosis and smallpox: results of the FEBIM study
    Annette Pfahlberg
    Department of Medical Informatics, Biometry and Epidemiology, University of Erlangen Nuremberg, Germany
    J Invest Dermatol 119:570-5. 2002
    ..Current immunologic theory of melanoma development provides a sound basis for understanding the biologic plausibility of the findings that have to be confirmed in future studies...
  24. doi request reprint Web-based data collection yielded an additional response bias--but had no direct effect on outcome scales
    Andreas Mayr
    Department of Medical Informatics, Biometry and Epidemiology, Chair of Biometry and Epidemiology, Friedrich Alexander University of Erlangen Nuremberg, Waldstr 6, D 91054 Erlangen, Germany
    J Clin Epidemiol 65:970-7. 2012
    ..To assess and to evaluate possible effects arising from Web-based data collection on the results of a study...
  25. doi request reprint The German Chronic Kidney Disease (GCKD) study: design and methods
    Kai Uwe Eckardt
    Department of Nephrology and Hypertension, University of Erlangen Nurnberg, Erlangen, Germany
    Nephrol Dial Transplant 27:1454-60. 2012
    ....
  26. doi request reprint A robust alternative to the schemper-henderson estimator of prediction error
    Matthias Schmid
    Department of Medical Informatics, Biometry and Epidemiology, Friedrich Alexander University Erlangen Nuremberg, Erlangen, Germany
    Biometrics 67:524-35. 2011
    ..The properties of the Schemper-Henderson estimator and its new modification are illustrated by means of a simulation study and the analysis of two clinical data sets...
  27. ncbi request reprint Comparison of confidence intervals for adjusted attributable risk estimates under multinomial sampling
    Andrea Lehnert-Batar
    Department of Medical Informatics, Biometry and Epidemiology, Friedrich Alexander University Erlangen Nuremberg, Waldstrasse 6, 91054 Erlangen, Germany
    Biom J 48:805-19. 2006
    ..Our results show that confidence intervals based on bootstrap and jackknife methods outperform intervals based on asymptotic theory. Best variants of computer intensive confidence intervals are indicated for different situations...
  28. doi request reprint Weight loss maintenance in a population-based sample of German adults
    Martina de Zwaan
    Department of Psychosomatic Medicine and Psychotherapy, University Hospital of Erlangen, Erlangen, Germany
    Obesity (Silver Spring) 16:2535-40. 2008
    ..More should be learned about the strategies that successful weight maintainers use to avoid regaining weight...
  29. pmc Cyclosporin A is superior to cyclophosphamide in children with steroid-resistant nephrotic syndrome-a randomized controlled multicentre trial by the Arbeitsgemeinschaft für Pädiatrische Nephrologie
    Christian Plank
    Department of Pediatrics, University Erlangen Nuremberg, Loschgestrasse 15, 91054, Erlangen, Germany
    Pediatr Nephrol 23:1483-93. 2008
    ..The number of adverse events was comparable between both groups. We conclude that CSA is more effective than CPH in inducing at least partial remission in steroid-resistant nephrotic syndrome in children...
  30. ncbi request reprint Population attributable fraction estimates of familial risk in cutaneous melanoma
    Annette Pfahlberg
    J Invest Dermatol 122:853-4. 2004
  31. ncbi request reprint Lung function among workers in the soft tissue paper-producing industry
    Thomas Kraus
    Institute and Outpatient Clinic for Occupational Medicine, University Hospital, Aachen University of Technology, Pauwelsstrasse 30, D 52074 Aachen, Germany
    Chest 125:731-6. 2004
    ..To describe lung function in correlation with information on exposure to dust and fibers in soft tissue paper-producing factories in Germany...
  32. ncbi request reprint Reproducibility of patch tests
    Wolfgang Uter
    Contact Dermatitis 51:43-4; author reply 45-46. 2004
  33. ncbi request reprint Re: "Applying recursive partitioning to a prospective study of factors associated with adherence to mammography screening guidelines"
    Martin Radespiel-Troger
    Am J Epidemiol 164:400-1; author reply 401-2. 2006
  34. ncbi request reprint Nevus density and atopic eczema
    Wolfgang J C Uter
    Arch Dermatol 141:101-2; author reply 102. 2005
  35. ncbi request reprint Vaccination and melanoma risk
    Annette Pfahlberg
    Int J Cancer 102:96-7. 2002
  36. ncbi request reprint Impact of repetitive manual materials handling and psychosocial work factors on the future prevalence of chronic low-back pain among construction workers
    Ute Latza
    Institute for Occupational Medicine, University of Hamburg and Hamburg State Department of Environment and Health, Germany
    Scand J Work Environ Health 28:314-23. 2002
    ..This study investigated the influence of manual stone and brick handling and psychosocial work factors on the risk of chronic low-back pain and describes the impact in terms of risk advancement period...
  37. pmc Erythropoietin therapy for acute stroke is both safe and beneficial
    Hannelore Ehrenreich
    Max Planck Institute for Experimental Medicine, Departments of Neurology and Psychiatry, Georg August University, Goettingen, Germany
    Mol Med 8:495-505. 2002
    ..EPO protects neurons from hypoxic/ ischemic injury. The objective of this trial is to study the safety and efficacy of recombinant human EPO (rhEPO) for treatment of ischemic stroke in man...
  38. ncbi request reprint Predicting mortality in patients with rheumatoid arthritis
    Frederick Wolfe
    Arthritis Research Center Foundation and University of Kansas School of Medicine, Wichita, Kansas 67214, USA
    Arthritis Rheum 48:1530-42. 2003
    ..This study was undertaken to evaluate the relative predictive strength and usefulness of a wide range of variables on the risk of mortality in a large, long-term, prospectively studied cohort of patients with RA...
  39. ncbi request reprint Induction of the photoaging-associated mitochondrial common deletion in vivo in normal human skin
    Mark Berneburg
    Molecular Oncology and Aging, Department of Dermatology, Eberhard Karls University, Tubingen, Germany
    J Invest Dermatol 122:1277-83. 2004
    ..Thus, mtDNA mutations are induced in the human skin by repetitive UV exposure. In addition, these mutations seem to represent long-term in-vivo biomarkers for actinic damage in the human skin...
  40. ncbi request reprint Patch tests with thiurams at 0.25% pet. and 1% pet. are of equal diagnostic value
    Johannes Geier
    Information Network of Department of Dermatology, University of Gottingen, Germany
    Contact Dermatitis 46:258-61. 2002
    ..The sensitivity of the mix also did not change when the breakdown test was performed with 1% pet. instead of 0.25% pet. Thus, we conclude that both concentrations are of equal diagnostic value in patch testing...