Comparing the nine-item Shared Decision-Making Questionnaire to the OPTION Scale - an attempt to establish convergent validity.

While there has been a clear move towards shared decision-making (SDM) in the last few years, the measurement of SDM-related constructs remains challenging. There has been a call for further psychometric testing of known scales, especially regarding validity aspects. To test convergent validity of the nine-item Shared Decision-Making Questionnaire (SDM-Q-9) by comparing it to the OPTION Scale. Cross-sectional study. Data were collected in outpatient care practices. Patients suffering from chronic diseases and facing a medical decision were included in the study. Consultations were evaluated using the OPTION Scale. Patients completed the SDM-Q-9 after the consultation. First, the internal consistency of both scales and the inter-rater reliability of the OPTION Scale were calculated. To analyse the convergent validity of the SDM-Q-9, correlation between the patient (SDM-Q-9) and expert ratings (OPTION Scale) was calculated. A total of 21 physicians provided analysable data of consultations with 63 patients. Analyses revealed good internal consistency of the SDM-Q-9 and limited internal consistency of the OPTION Scale. Inter-rater reliability of the latter was less than optimal. Association between the total scores of both instruments was weak with a Spearman correlation of r = 0.19 and did not reach statistical significance. By the use of the OPTION Scale convergent validity of the SDM-Q-9 could not be established. Several possible explanations for this result are discussed. This study shows that the measurement of SDM remains challenging.

Scholl I ，Kriston L ，Dirmaier J ，Härter M ... -  《-》

Dutch Translation and Psychometric Testing of the 9-Item Shared Decision Making Questionnaire (SDM-Q-9) and Shared Decision Making Questionnaire-Physician Version (SDM-Q-Doc) in Primary and Secondary Care.

Rodenburg-Vandenbussche S ，Pieterse AH ，Kroonenberg PM ，Scholl I ，van der Weijden T ，Luyten GP ，Kruitwagen RF ，den Ouden H ，Carlier IV ，van Vliet IM ，Zitman FG ，Stiggelbout AM ... -  《PLoS One》

Validity and reliability of the 9-item Shared Decision Making Questionnaire (SDM-Q-9) in a national survey in Hungary.

Rencz F ，Tamási B ，Brodszky V ，Gulácsi L ，Weszl M ，Péntek M ... -  《-》

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

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

De las Cuevas C ，Perestelo-Perez L ，Rivero-Santana A ，Cebolla-Martí A ，Scholl I ，Härter M ... -  《-》

Association between physicians' and patients' perspectives of shared decision making in primary care settings in Japan: The impact of environmental factors.

Goto Y ，Miura H ，Son D ，Scholl I ，Kriston L ，Härter M ，Sato K ，Kusaba T ，Arai H ... -  《PLoS One》