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Table 2 Characteristics of tools presenting new psychometric properties (n = 9)

From: Evaluating the quality of shared decision making during the patient-carer encounter: a systematic review of tools

Name of the tool

Name of the tool’s version

First author, year of publication (reference no)

Study type

Point of view

Number of dimensions and items of SDM

Response-scale

Reliability

Validity

Decisional Conflict Scale

Japanese version of DCS

Kawaguchi, 2013 [44]

Transcultural validation in Japanese language

Patient

5 dimensions;

16 items

Uncertainty (3)

Informed (3)

Values clarity (3)

Support (3)

Effective decision (4)

5-point scale

Cronbach’s alpha = 0.84–0.96

ICC = 0.63–0.93

Content validity: Yes

Face validity: No

Construct validity: Yes

Convergent/discriminant validity: Yes

OPTION scale

German version of the OPTION scale

Hirsch, 2012 [45]

Transcultural validation in German language

Observer

1 dimension;

12 items

5-point scale

Cronbach’s alpha = 0.90

ICC = 0.68–0.82

Face validity: No

Construct validity: Yes

Convergent/discriminant validity: No

Criterion validity: Yes

PICS

I-PICS

Jonsdottir, 2013 [49]

Transcultural validation in Icelandic language

Patient

4 dimensions;

20 items

Health care professional (HCP)information (6)

Patient information (5)

Patient participation in decision making (4)

HCP facilitation (5)

5-point Likert scale

Cronbach’s alpha = 0.86

Face validity: No

Construct validity: Yes

Convergent/discriminant validity: No

Criterion validity: Yes

SDM-Q-9

Spanish version of SDM-Q-9

De Las Cuevas, 2014 [50]

Transcultural validation in Spanish language

Patient

1 dimension;

9 items

6-point scale

Cronbach’s alpha = 0.89

ICC = 0.52–0.82 (item 1: 0.27)

Face validity: Yes

Construct validity: Yes

Convergent/discriminant validity: Yes

Decisional conflict Scale

DCS-LL (low literacy version of decisional conflict scale)

Linder, 2011 [51]

Transcultural validation in low literacy version

Patient

4 dimensions;

10 items

Uncertainty (2)

Informed (3)

Values clarity (2)

Supported (3)

3-point scale

Cronbach’s alpha = 0.80

ICC = 0.43–0.87

Content validity: No

Face validity: No

Construct validity: Yes

Convergent/discriminant validity: Yes

OPTION scale

Revised-scale of OPTION scale

Kasper, 2012 [43]

Specific psychometric properties (criterion validity)

Patient, professional

1 dimension;

12 items

5-point scale

Cronbach’s alpha = Yes

Criterion validity: Yes

OPTION scale

Modified-OPTION scale

Keller, 2013 [47]

Specific psychometric properties (criterion validity, sensitivity analysis)

Observer

1 dimension;

12 items

5-point scale

Cronbach’s alpha = 0.90

ICC = 0.43–0.82

Criterion validity: Yes

Sensitivity analyses: Yes

SURE

SURE

Ferron Parayre, 2014 [48]

Specific psychometric properties (criterion validity, sensitivity analysis)

Patient

1 dimension;

4 items

5-point scale

Cronbach’s alpha = 0.70

Content validity: Yes

Face validity: No

Construct validity: No

Convergent/discriminant validity: No

Criterion validity: Yes

Sensitivity analyses: Yes

OPTION scale

OPTION scale

Nicolai, 2012 [46]

New psychometric properties

Observer

1 dimension;

12 items

5-point scale

Cronbach’s alpha = Yes

Criterion validity: Yes

Convergent/discriminant validity: unknown