Table 4. Quality of design, methods and reporting of studies on psychometric properties (COSMIN ratings).

Measure (target population)	Authors (Year)	IRT or CTT	Score IRT	A	B	C	D	E	F	G	I
Patient Empowerment Scale (All patients, generic)	Faulkner (2001) [13]	CTT		0			0
Kim Alliance Scale (All patients, generic)	Kim et al. (2001) [46]	CTT		+			0	+	0
Kim Alliance Scale Revised (All patients, generic)	Kim et al. (2008) [47]	CTT		+			0	+	0
Treatment-Related Empowerment Scale (All patients, generic)	Webb et al. (2001) [45]	CTT		0			0		0
Health Education Impact Questionnaire (All patients, generic)	Osborne et al. (2007) [44]	CTT & IRT	++	0			+	+
No name (Scale developed by Bann et al) (All patients, generic)	Bann et al. (2010) [49]	CTT		+			0	+	+
Health Care Empowerment Inventory (All patients, generic)	Johnson et al. (2012) [52]	CTT		+			0	+	+
Empowerment Scale version 1 (Mental health patients)	Wowra & McCarter (1999) [29]	CTT		+				+	+
Empowerment Scale version 1 (Mental health patients)	Hansson & Bjorkman (2005) [28]	CTT		0			0	0	0	0
Empowerment Scale version 1 (Mental health patients)	Yamada & Kuzuki (2007) [31]	CTT						0	0
Empowerment Scale version 1 (Mental health patients)	Rogers et al. (2010) [30]	CTT		0				0	0
Empowerment Scale version 2 (Mental health patients)	Corrigan et al. (1999) [36]	CTT			+			0	0
Health Promotion Intervention Questionnaire (Mental health patients)	Svedberg et al. (2007) [33]	CTT							+
Health Promotion Intervention Questionnaire (Mental health patients)	Svedberg et al. (2008) [32]	CTT		+	0		+	+	+
Empowerment Questionnaire for Inpatients (Mental health patients)	Lopez et al. (2010) [37]	CTT		0	0		0	0	0
Consumer Evaluation Of Mental Health Services (Mental health patients)	Oades et al. (2011) [34]	CTT		0			+++	0
Inpatient Consumer Survey (Mental health patients)	Ortiz & Schacht (2012) [35]	CTT		0			0	+	0
Diabetes Empowerment Scale version 1 (Diabetes patients)	Anderson et al. (2000) [16]	CTT		+			0	+	0
Diabetes Empowerment Scale version 1 (Diabetes patients)	Sigurdardottir & Jonsdottir (2008) [41]	CTT		0			++	0	+	0
Diabetes Empowerment Scale version 1 (Diabetes patients)	Tol et al. (2012) [42]	CTT		+			++	+	+	+
Diabetes Empowerment Scale version 2 (Diabetes patients)	Shiu et al. (2003) [39]	CTT		+	0		++	+	+	+
Diabetes Empowerment Scale version 2 (Diabetes patients)	Shiu et al. (2006) [40]	CTT		+				+	+
Diabetes Empowerment Scale version 3 (Diabetes patients)	Leksell et al. (2007) [38]	CTT		+			0	+	0	0
Chinese Diabetes Empowerment Process Scale (Diabetes patients)	Chen et al. (2011) [43]	CTT		+	+		+	+	0
Patient Empowerment Scale (Cancer patients)	Bulsara et al. (2006) [17]	IRT	+	0			+	+
Cyber Info-Decisional Empowerment Scale (Cancer patients)	Seckin (2011) [53]	CTT		+				+	+
Genetic Counseling Outcome Scale (Clinical Genetics patients)	McAllister et al. (2011) [18]	CTT		0	+		++	++	0		+
Parents’ Postnatal Sense of Security (Postnatal patients)	Persson et al. (2007) [48]	CTT		+			+	+
Psoriasis Empowerment Enquiry in the Routine practice (Psoriasis patients)	Pagliarello et al. (2010) [50]	CTT		+			0	+
The Swedish Rheumatic Disease Empowerment Scale (Rheumatology patients)	Arvidsson et al. (2012) [51]	CTT		+			0	+	+

COSMIN psychometric property boxes: A = internal consistency, B = reliability, C = measurement error, D = content validity, E = structural validity, F = hypothesis testing, G = cross-cultural validity, I = responsiveness. 4-point scale rating: +++ = excellent, ++ = good, + = fair, 0 = poor, empty space = COSMIN rating not applicable. IRT = item response theory; CTT = classical test theory.