Table 4 Mean values and standard deviation for each Persian 3*I item score, test–retest reliability by ICC and Cronbach's α for the questionnaire domains

Item 1

2.50 ± 1.28

2.29 ± 1.19

0.68*

(0.27, 0.86)

Item 2

3.70 ± 1.26

4.04 ± 1.04

0.74*

(0.40, 0.88)

Item 3

3.79 ± 1.10

4.12 ± 1.36

0.73*

(0.39, 0.88)

Item 4

2.41 ± 1.21

2.16 ± 1.46

0.79*

(0.52, 0.91)

Item 5

3.25 ± 1.29

3.20 ± 1.64

0.80*

(0.54, 0.91)

Item 6

2.75 ± 1.42

2.54 ± 1.86

0.89*

(0.75, 0.95)

Item 7

2.54 ± 1.28

2.16 ± 1.23

0.86*

(0.68, 0.94)

Item 8

3.45 ± 1.25

3.70 ± 1.30

0.87*

(0.71, 0.94)

Discounting

2.78 ± 0.80

2.64 ± 0.98

0.88*

(0.74, 0.95)

0.57

Lack of understanding

2.50 ± 0.90

2.31 ± 1.23

0.82*

(0.60, 0.92)

0.76

Family

Item 1

2.92 ± 1.35

3.19 ± 1.38

0.82*

(0.61, 0.92)

Item 2

3.28 ± 1.41

3.96 ± 1.37

0.81*

(0.60, 0.91)

Item 3

3.67 ± 1.12

3.96 ± 1.37

0.80*

(0.58, 0.91)

Item 4

2.21 ± 1.16

1.75 ± 1.20

0.74*

(0.44, 0.88)

Item 5

3.39 ± 1.34

3.17 ± 1.44

0.77*

(0.51, 0.89)

Item 6

2.85 ± 1.29

2.53 ± 1.62

0.88*

(0.75, 0.94)

Item 7

2.92 ± 1.21

2.89 ± 1.49

0.83*

(0.63, 0.92)

Item 8

3.53 ± 1.10

3.78 ± 1.03

0.79*

(0.55, 0.90)

Discounting

2.84 ± 0.66

2.94 ± 0.86

0.87*

(0.73, 0.94)

0.65

Lack of understanding

2.46 ± 0.89

2.35 ± 1.14

0.87*

(0.73, 0.94)

0.52

Medical professionals

Item 1

2.21 ± 1.37

1.67 ± 1.18

0.88*

(0.74, 0.94)

Item 2

3.35 ± 1.33

3.53 ± 1.40

0.82*

(0.62, 0.91)

Item 3

4.57 ± 0.83

4.71 ± 0.65

0.81*

(0.60, 0.91)

Item 4

1.32 ± 0.66

1.42 ± 0.74

0.85*

(0.69, 0.93)

Item 5

4.32 ± 0.94

4.60 ± 0.91

0.76*

(0.49, 0.89)

Item 6

1.71 ± 1.08

1.82 ± 1.12

0.74*

(0.45, 0.88)

Item 7

1.89 ± 0.91

2.10 ± 0.91

0.80*

(0.58, 0.91)

Item 8

4.10 ± 1.13

4.67 ± 0.81

0.75*

(0.46, 0.88)

Discounting

2.10 ± 0.61

2.11 ± 0.62

0.92*

(0.84, 0.96)

0.66

Lack of understanding

1.66 ± 0.66

1.33 ± 0.49

0.70*

(0.36, 0.86)

0.76

Work environment

Item 1

2.92 ± 1.07

2.71 ± 1.43

0.88*

(0.65, 0.96)

Item 2

4.14 ± 0.86

4.28 ± 0.72

0.87*

(0.60, 0.95)

Item 3

3.71 ± 0.99

4.00 ± 0.96

0.84*

(0.50, 0.94)

Item 4

2.21 ± 0.97

1.71 ± 0.91

0.86*

(0.58, 0.95)

Item 5

2.71 ± 1.20

2.07 ± 1.54

0.72*

(0.15, 0.91)

Item 6

2.71 ± 1.32

2.78 ± 1.80

0.89*

(0.65, 0.96)

Item 7

3.57 ± 1.08

3.57 ± 1.08

0.89*

(0.66, 0.96)

Item 8

4.07 ± 0.99

4.28 ± 0.72

0.80*

(0.40, 0.93)

Discounting

3.11 ± 0.33

3.01 ± 0.44

0.74*

(0.20, 0.91)

0.88

Lack of understanding

2.50 ± 0.70

2.54 ± 0.80

0.86*

(0.57, 0.95)

0.61

Social services

Item 1

1.91 ± 0.66

1.50 ± 0.79

0.86*

(0.51, 0.96)

Item 2

3.08 ± 1.16

3.00 ± 1.20

0.73*

(0.08, 0.92)

Item 3

4.00 ± 0.73

3.83 ± 1.02

0.80*

(0.33, 0.94)

Item 4

1.58 ± 0.79

1.66 ± 0.77

0.77*

(0.23, 0.93)

Item 5

3.16 ± 1.40

2.83 ± 1.40

0.86*

(0.51, 0.96)

Item 6

2.16 ± 1.11

2.00 ± 1.20

0.89*

(0.63, 0.97)

Item 7

2.41 ± 1.50

3.00 ± 1.34

0.86*

(0.51, 0.96)

Item 8

3.50 ± 0.90

4.00 ± 1.20

0.78*

(0.23, 0.93)

Discounting

2.23 ± 0.76

2.23 ± 0.71

0.91*

(0.68, 0.97)

0.71

Lack of understanding

2.44 ± 0.72

2.44 ± 0.67

0.87*

(0.55, 0.96)

0.75