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Dentists' Understanding of Diagnostic Test Results and Treatment Efficacy. (RCDENT2017)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details.
 
ClinicalTrials.gov Identifier: NCT03051295
Recruitment Status : Completed
First Posted : February 13, 2017
Last Update Posted : February 13, 2017
Sponsor:
Information provided by (Responsible Party):
Paulo Nadanovsky, Rio de Janeiro State University

Brief Summary:
There is little evidence on how best to present diagnostic and treatment effect information to dentists and whether this makes any difference to their understanding of the information given and clinical management. The objective of this study is to assess the influence of different formats for presenting diagnostic test results and treatment efficacy on dentists' understanding and on their reported clinical management. The hypothesis is that presenting diagnostic test and treatment effectiveness results using natural frequencies influences the threshold for treatment and improves interpretation of tests results compared to conditional probabilities and percentage differences. A group of dentists recruited from postgraduate courses were randomized to two of four arms, being two arms of a hypothetical realistic diagnostic scenario (a) and two arms of a hypothetical realistic treatment scenario (b): a1) diagnostic test results presented in conditional probabilities; a2) diagnostic test results presented in natural frequencies; b1) treatment efficacy presented in percentages; b2) treatment efficacy presented in natural frequencies. The main outcome measures were the correct answer as to whether disease was actually present (post-test probability) and the correct answer as the number of patients that would benefit from the treatment (efficacy). Secondary outcome measures included the decision whether to treat or not treat the hypothetical patient.

Condition or disease Intervention/treatment Phase
Health Education Other: Dental health information form Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 101 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: The Influence of Different Formats for Presenting Diagnostic Test Results and Treatment Efficacy on Dentists' Understanding and on Their Reported Clinical Management.
Actual Study Start Date : June 8, 2016
Actual Primary Completion Date : December 13, 2016
Actual Study Completion Date : December 13, 2016

Arm Intervention/treatment
Active Comparator: Diagnostic percentages.
Dentist receives diagnostic test results presented in conditional probabilities.
Other: Dental health information form
The format in which dentists receive information about diagnostic test results and efficacy of treatment.

Experimental: Diagnostic frequencies
Dentist receives diagnostic test results presented in natural frequencies.
Other: Dental health information form
The format in which dentists receive information about diagnostic test results and efficacy of treatment.

Active Comparator: Treatment percentages.
Dentist receives treatment efficacy presented in percentages.
Other: Dental health information form
The format in which dentists receive information about diagnostic test results and efficacy of treatment.

Experimental: Treatment frequencies.
Dentist receives treatment efficacy presented in natural frequencies.
Other: Dental health information form
The format in which dentists receive information about diagnostic test results and efficacy of treatment.




Primary Outcome Measures :
  1. The probability that a patient will have a dental cavity as assessed by a dentist. [ Time Frame: Up to 20 minutes ]
    The assessement by the dentist was based on a questionnarie containing a clinical hypothetical situation and the result of a bite-wing radiographic exam.

  2. The number of patients that will benefit from systemic antibiotics adjunct to periodontal treatment as assessed by a dentist. [ Time Frame: Up to 20 minutes ]
    The assessement by the dentist was based on a questionnarie containing a clinical hypothetical situation and the information about the usual efficacy of systemic antibiotics adjunct to periodontal treatment.


Secondary Outcome Measures :
  1. The number of dentists that would recommend the use of systemic antibiotics adjunct to periodontal treatment in the clinical management of a patient with periodontal disease. [ Time Frame: Up to 20 minutes ]
    The recommendation by the dentist was based on a questionnarie containing a clinical hypothetical situation and the information about the usual efficacy of systemic antibiotics adjunct to periodontal treatment.



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Ages Eligible for Study:   Child, Adult, Older Adult
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Graduated dentist undergoing a postgraduate course in a public university in Rio de Janeiro.

Exclusion Criteria:

  • None.
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Responsible Party: Paulo Nadanovsky, Prof. Dr., Rio de Janeiro State University
ClinicalTrials.gov Identifier: NCT03051295    
Other Study ID Numbers: riskcommunicationdentist2017
First Posted: February 13, 2017    Key Record Dates
Last Update Posted: February 13, 2017
Last Verified: February 2017
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No
Keywords provided by Paulo Nadanovsky, Rio de Janeiro State University:
Communication Barriers
Persuasive Communication
Risk