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What is the effect of alternative graphical displays used to present the benefits of antibiotics for sore throat on decisions about whether to use them?
ISRCTN ISRCTN58507086
ClinicalTrials.gov identifier
Public title What is the effect of alternative graphical displays used to present the benefits of antibiotics for sore throat on decisions about whether to use them?
Scientific title
Acronym HIPPO (Health Information Project, Presentation Online)
Serial number at source N/A
Study hypothesis The null hypotheses for this study are that in terms of congruence between peoples' values and treatment decisions there is no difference between the following graphical displays used to present the benefits of antibiotics for sore throat:
1. “Faces at 3 days” and “Bar graphs at 3 days”
2. “Bar graphs of Duration of symptoms” and “Bar graphs at 3 days”, and
3. ”Bar graphs at 0, 3 and 7 days” and “Bar graphs at 3 days.”
Lay summary
Ethics approval The University at Buffalo (New York, USA), Health Sciences Institutional Review Board, approved on 15 May 2002.
Study design Randomised controlled trial
Countries of recruitment Norway
Disease/condition/study domain Sore throat (hypothetical scenario)
Participants - inclusion criteria Fluency in Norwegian and at least 18 years of age.
Participants - exclusion criteria Previous participation in this trial.
Anticipated start date 01/09/2004
Anticipated end date 31/10/2004
Status of trial Completed
Patient information material
Target number of participants 3000
Interventions Presentations of graphical displays showing evidence of penicillin's effect on sore throat.
Primary outcome measure(s) Hypothetical treatment decision to take or not to take penicillin.
Secondary outcome measure(s) Understanding of and satisfaction with information, and preferred graphical display.
Sources of funding Norwegian Research Council (Norway)
Trial website
Publications 2009 results in http://www.ncbi.nlm.nih.gov/pubmed/19707579
Contact name Ms  Cheryl  Carling
  Address PO box 7004
St Olavs Plass
  City/town Oslo
  Zip/Postcode N-0130
  Country Norway
  Tel +47 98627327
  Email cheryl.carling@kunnskapssenteret.no
Sponsor Norwegian Knowledge Centre for the Health Services (Norway)
  Address PO box 7004
St Olavs Plass
  City/town Oslo
  Zip/Postcode N-0130
  Country Norway
  Tel +47 (0)23 25 50 00
  Fax +47 (0)23 25 50 10
  Email post@kunnskapssenteret.no
  Sponsor website http://www.kunnskapssenteret.no/
Date applied 09/03/2007
Last edited 02/09/2009
Date ISRCTN assigned 04/05/2007