Asbjørn Hróbjartsson

Summary

Affiliation: Det Nordiske Cochrane Center
Country: Denmark

Publications

  1. ncbi request reprint Powerful spin in the conclusion of Wampold et al.'s re-analysis of placebo versus no-treatment trials despite similar results as in original review
    Asbjørn Hróbjartsson
    Hróbjartsson, The Nordic CochraneCentre, Rigshospitalet, Department 7112, Blegdamsvej 9, DK 2100 Copenhagen Ø
    J Clin Psychol 63:373-7. 2007
  2. ncbi request reprint [What is the effect of placebo interventions? A systematic review of randomized clinical trials with placebo treated and untreated patients]
    Asbjørn Hróbjartsson
    Afdeling for Medicinsk Videskabsteori, Københavns Universitet, Panum Instituttet, DK 2200 København N
    Ugeskr Laeger 164:329-33. 2002
  3. ncbi request reprint [A new scientific source of bias: SILLY bias. Analysis of citations of BMJ's Christmas articles]
    Ulrik A Felding
    Det Nordiske Cochrane Center, Rigshospitalet, København Ø
    Ugeskr Laeger 171:3784-9. 2009
  4. pmc Disagreements in meta-analyses using outcomes measured on continuous or rating scales: observer agreement study
    Britta Tendal
    Nordic Cochrane Centre, Rigshospitalet, Dept 3343, Blegdamsvej 9, DK 2100 Copenhagen, Denmark
    BMJ 339:b3128. 2009
  5. doi request reprint Reporting on blinding in trial protocols and corresponding publications was often inadequate but rarely contradictory
    Asbjørn Hróbjartsson
    The Nordic Cochrane Centre, Rigshospitalet, Copenhagen, Denmark
    J Clin Epidemiol 62:967-73. 2009
  6. pmc Divine intervention? A Cochrane review on intercessory prayer gone beyond science and reason
    Karsten Juhl Jørgensen
    Dept 3343, The Nordic Cochrane Centre, Rigshospitalet, DK 2100 Copenhagen, Denmark
    J Negat Results Biomed 8:7. 2009
  7. ncbi request reprint Data extraction errors in meta-analyses that use standardized mean differences
    Peter C Gøtzsche
    Nordic Cochrane Centre, Rigshospitalet, Copenhagen Ø, Denmark
    JAMA 298:430-7. 2007
  8. pmc Ghost authorship in industry-initiated randomised trials
    Peter C Gøtzsche
    Nordic Cochrane Centre, Copenhagen, Denmark
    PLoS Med 4:e19. 2007
  9. ncbi request reprint [Constraints on publication rights in industry-initiated clinical trials--secondary publication]
    Peter C Gøtzsche
    H S Rigshospitalet, Det Nordiske Cochrane Center, DK 2100 København Ø
    Ugeskr Laeger 168:2467-9. 2006
  10. ncbi request reprint [Selective reporting of positive outcomes in randomised trials--secondary publication.. A comparison of protocols with published reports]
    Asbjørn Hróbjartsson
    H S Rigshopitalet, Det Nordiske Cochrane Center, University Health Network Toronto, Department of Medicine
    Ugeskr Laeger 167:3189-91. 2005

Detail Information

Publications12

  1. ncbi request reprint Powerful spin in the conclusion of Wampold et al.'s re-analysis of placebo versus no-treatment trials despite similar results as in original review
    Asbjørn Hróbjartsson
    Hróbjartsson, The Nordic CochraneCentre, Rigshospitalet, Department 7112, Blegdamsvej 9, DK 2100 Copenhagen Ø
    J Clin Psychol 63:373-7. 2007
    ..95 (95% confidence interval = 0.88-1.02) versus odds ratio 0.99 (95% confidence interval = 0.81-1.23). Thus, B. E. Wampold et al.'s conclusion was not substantiated by their data, and is best characterized as powerful spin. ...
  2. ncbi request reprint [What is the effect of placebo interventions? A systematic review of randomized clinical trials with placebo treated and untreated patients]
    Asbjørn Hróbjartsson
    Afdeling for Medicinsk Videskabsteori, Københavns Universitet, Panum Instituttet, DK 2200 København N
    Ugeskr Laeger 164:329-33. 2002
    ..Placebo treatments have been reported to help patients with many diseases, but the quality of the evidence supporting this belief has not been rigorously evaluated...
  3. ncbi request reprint [A new scientific source of bias: SILLY bias. Analysis of citations of BMJ's Christmas articles]
    Ulrik A Felding
    Det Nordiske Cochrane Center, Rigshospitalet, København Ø
    Ugeskr Laeger 171:3784-9. 2009
    ..Thus, we document a new type of bias in medical research: Serious Idiopathic Loss of Ludic ironY (SILLY) bias, both in citation practices and in metaanalyses...
  4. pmc Disagreements in meta-analyses using outcomes measured on continuous or rating scales: observer agreement study
    Britta Tendal
    Nordic Cochrane Centre, Rigshospitalet, Dept 3343, Blegdamsvej 9, DK 2100 Copenhagen, Denmark
    BMJ 339:b3128. 2009
    ..To study the inter-observer variation related to extraction of continuous and numerical rating scale data from trial reports for use in meta-analyses...
  5. doi request reprint Reporting on blinding in trial protocols and corresponding publications was often inadequate but rarely contradictory
    Asbjørn Hróbjartsson
    The Nordic Cochrane Centre, Rigshospitalet, Copenhagen, Denmark
    J Clin Epidemiol 62:967-73. 2009
    ..To compare the reporting on blinding in protocols and articles describing randomized controlled trials...
  6. pmc Divine intervention? A Cochrane review on intercessory prayer gone beyond science and reason
    Karsten Juhl Jørgensen
    Dept 3343, The Nordic Cochrane Centre, Rigshospitalet, DK 2100 Copenhagen, Denmark
    J Negat Results Biomed 8:7. 2009
    ..The review fails to live up to the high standards required for Cochrane reviews...
  7. ncbi request reprint Data extraction errors in meta-analyses that use standardized mean differences
    Peter C Gøtzsche
    Nordic Cochrane Centre, Rigshospitalet, Copenhagen Ø, Denmark
    JAMA 298:430-7. 2007
    ..It is not known how reliable such meta-analyses are...
  8. pmc Ghost authorship in industry-initiated randomised trials
    Peter C Gøtzsche
    Nordic Cochrane Centre, Copenhagen, Denmark
    PLoS Med 4:e19. 2007
    ..The prevalence and nature of ghost authorship in industry-initiated randomised trials is not known...
  9. ncbi request reprint [Constraints on publication rights in industry-initiated clinical trials--secondary publication]
    Peter C Gøtzsche
    H S Rigshospitalet, Det Nordiske Cochrane Center, DK 2100 København Ø
    Ugeskr Laeger 168:2467-9. 2006
    ..These facts were not noted in any of the trial reports. We found similar constraints on publication rights in 44 protocols from 2004. This tight sponsor control over industry-initiated trials should be changed...
  10. ncbi request reprint [Selective reporting of positive outcomes in randomised trials--secondary publication.. A comparison of protocols with published reports]
    Asbjørn Hróbjartsson
    H S Rigshopitalet, Det Nordiske Cochrane Center, University Health Network Toronto, Department of Medicine
    Ugeskr Laeger 167:3189-91. 2005
    ..Selective reporting of positive outcomes is associated with bias...
  11. ncbi request reprint What are the main methodological problems in the estimation of placebo effects?
    Asbjørn Hróbjartsson
    Department of Medical Philosophy and Clinical Theory, University of Copenhagen, Panum Institute, Blegdamsvej 3, DK 220 Ø Copenhagen N, Denmark
    J Clin Epidemiol 55:430-5. 2002
    ..The effect of patient-provider interaction can similarly be assessed by comparing manipulation of the patient-provider interaction with no manipulation. In both cases bias due to lack of double-blinding is a potential problem...
  12. pmc Conflicts of interest at medical journals: the influence of industry-supported randomised trials on journal impact factors and revenue - cohort study
    Andreas Lundh
    The Nordic Cochrane Centre, Rigshospitalet, Copenhagen, Denmark
    PLoS Med 7:e1000354. 2010
    ..We investigated industry-supported trials' influence on journal impact factors and revenue...