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Content validity of a health science evidence-based practice questionnaire (HS-EBP) with a web-based modified Delphi
Juan Carlos Fernández-Domínguez1, Albert Sesé-Abad2, Jose Miguel Morales-Asencio3
1Faculty of Nursing and Physiotherapy, University of the Balearic Islands, 07122 Palma de Mallorca (Balearic Islands), Spain.
Objective:
To develop a tool for measuring evidence-based practice (EBP) and to evaluate its content validity by Delphi technique. A five-factor/dimensions latent structure for the EBP construct was defined a priori and operationalized.
Design:
Online Delphi technique.
Setting And Participants:
A group of 32 national EBP experts from different health professions.
Intervention:
The experts rated the initial questionnaire items according to adequacy and relevance criteria using four-point Likert scales and including open fields for suggestions, with basic and supplementary criteria consensus established a priori.
Main Outcome Measure:
Level of consensus in the Content Validity Index Item.
Results:
An EBP construct solution was designed with the elements that constitute the operationalization proposal of the EBP. This initial version consisted of 76 items, whereas the version arising from the Delphi study was made up of 73 items. In the first round, 13 items did not reach the minimum level of consensus, and 12 of these were reformulated. Three additional items were removed in the second round.
Conclusions:
A new psychometric tool forms measuring EBP with a five-factor structure, and 73 items obtained adequate content validity evidence based on expert opinion.
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