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Health Expect. 2015 Dec;18(6):2143-53. doi: 10.1111/hex.12183. Epub 2014 Mar 5.

Validation of the Spanish version of the 9-item Shared Decision-Making Questionnaire.

Author information

1
Department of Psychiatry, University of La Laguna, Canary Islands, Spain.
2
Red de Investigación en Servicios de Salud en Enfermedades Crónicas (REDISSEC), Tenerife, Spain.
3
Evaluation Unit of the Canary Islands Health Service (SESCS), Tenerife, Spain.
4
Canarian Foundation of Health and Research (FUNCIS), Tenerife, Spain.
5
Universitat Jaume I, CIBEROBN Fisiopatologia de la Obesidad y la Nutrición, Castellon de la Plana, Spain.
6
Department of Medical Psychology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.

Abstract

OBJECTIVE:

To translate and assess the psychometric properties of the 9-item Shared Decision-Making Questionnaire (SDM-Q-9) for measuring patients' perceptions of how clinicians' performance fits the SDM process.

DESIGN:

Cross-sectional study.

SETTING AND PARTICIPANTS:

Data were collected in primary care health centres. Patients suffering from chronic diseases and facing a medical decision were included in the study.

MEASUREMENTS:

The original German SDM-Q-9 was translated to Spanish using the process of cross-cultural adaptation of self-reported measures as the methodological model for Spanish translation. Reliability (internal consistency) and construct validity [exploratory (EFA) and confirmatory factor analysis (CFA)] were assessed.

RESULTS:

The final Spanish version of the SDM-Q-9 was tested in a primary care sample of 540 patients. The SDM-Q-9 presented adequate reliability and acceptable validity. Internal consistency yielded a Cronbach's alpha of 0.885 for the whole scale. EFA showed a two-factorial solution, and for the CFA, the best solution was obtained with a one-dimensional factor with the item 1 excluded, which produced the best indexes of fit.

DISCUSSION AND CONCLUSIONS:

The Spanish version of the SDM-Q-9 showed adequate reliability and acceptable validity parameters among primary care patients. The SDM-Q-9 is suitable for use in Spain and other Spanish-speaking countries with similarly organized health-care systems. The use of the SDM-Q-9 may contribute to the evaluation of SDM process from the patient's perspective.

KEYWORDS:

Spain; patient involvement; psychometrics; questionnaires; shared decision making

PMID:
24593044
PMCID:
PMC5810694
DOI:
10.1111/hex.12183
[Indexed for MEDLINE]
Free PMC Article

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