Table 1 General description of publications included in the analysis (45 publications reviewed)

Year of publication

2014–2015

15 (33.3)

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 20, 28

2012–2013

12 (26.7)

14, 15,16,17, 18, 19, 21, 22, 23, 24, 25, 26,

2010–2011

6 (13.3)

27, 29, 30, 31, 32, 33,

2008–2009

6 (13.3)

34, 35, 36, 37, 38, 44

2006–2007

6 (13.3)

39, 40, 41, 42, 43, 45

Aim/type of study

Descriptive

6 (13.3)

6, 8, 21, 23, 31, 38

Explorative

3 (6.7)

1, 5, 27,

Explanatory

36 (80)

3, 4, 6, 7, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 20, 22, 24, 25, 26, 28, 29, 30, 32, 33, 34, 35, 36, 37, 39, 41, 40, 42, 43, 44, 45

Research approach

Qualitative (primary data)

6 (13)

2, 5, 7, 23, 31, 38

Quantitative (primary data)

32 (69.6)

3, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 22, 24, 25, 26, 27, 28, 29, 32, 33, 34, 35, 36, 37, 39, 40, 41, 42, 43, 44, 45

Mixed (primary data)

3 (6.5)

1, 4, 30

Desk research (secondary data)

5 (10.9)

6, 8, 12, 13, 21

Design

Qualitative

7 (15.2)

1, 2, 5, 7, 23, 31, 38

Quantitative - randomized controlled trial

28 (60.9)

3, 4, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 22, 24, 25, 26, 27, 28, 29, 33, 34, 37, 40, 41, 42, 43, 44

Qualitative - not randomized controlled trial

9 (19.6)

6, 13, 23, 30, 32, 35, 36, 39, 45

Systematic review

2 (4.3)

8, 21

Data collection/design

Observations

1 (2)

1

Focus group discussion

2 (4)

2, 16

Unstructured/semi structured interviews

7 (13))

1, 3, 5, 7, 31, 38, 40

Standardized questionnaires/interviews/surveys

9 (17

11, 14, 18, 20, 30, 33, 37, 42, 43

Online web based questionnaires/assessments

10 (19)

4, 10, 17, 25, 26, 27, 28, 29, 40, 44

Secondary data/patient records

5 (10)

8, 9, 12, 13, 21

Test results/self-report

18 (35)

6, 11, 15, 18, 19, 22, 23, 24, 25, 32, 33, 34, 35, 36, 37, 39, 41, 45

Reliability//

Reliability is clear

19 (42.2)

1, 2, 5, 7, 8, 12, 14, 15, 16, 20, 21, 22, 24, 27, 38, 40, 41, 43, 44

Reliability is unclear

22 (48.9)

6, 9, 10, 11, 13, 17, 18, 19, 23, 25, 28, 29, 31, 32, 33, 34, 35, 36, 37, 39, 42, 45

Reliability is not analyzed

4 (8.9)

3, 4, 26, 30,

Validity

Validity is clear

16 (35.6)

1, 2, 3, 5, 8, 15, 16, 20, 21, 30, 36, 38, 41, 42, 43, 44

Validity is unclear

22 (48.9)

4, 6, 9, 11, 13, 14, 18, 19, 22, 23, 24, 25, 28, 29, 31, 32, 34, 35, 37, 39, 40, 45

Validity is not analyzed

7 (15.6)

7, 10, 12, 17, 26, 27, 33

Generalizability

Generalizability is clear

11 (24.4)

1, 5, 6, 8, 9, 14, 16, 22, 42, 43, 45

Generalizability is unclear

20 (44.4)

2, 3, 11, 12, 13,17, 18, 19, 20, 24, 25, 28, 29, 31, 34, 37, 39, 40, 41, 44

Generalizability is not analyzed

14 (31.1)

4, 7 10, 15, 21, 23, 26, 27, 30, 32, 33, 35, 36, 38,