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Table 3 Analysis and description of behavior questionnaire items

From: Diabetes-related instrument to assess preventive behaviors among adolescents (DIAPBA): a tool development and psychometric research

Items

Means

Standard deviations

Range

Discriminatory power

Difficulty indices

Cronbach’s alpha if item deleted

Communalities

Item1

2.57

1.21

4

0.49

0.55

0.66

0.65

Item2

2.46

1.32

4

0.53

0.54

0.65

0.62

Item3

2.18

1.32

4

0.49

0.43

0.66

0.55

Item4

2.79

1.15

4

0.43

0.63

0.66

0.54

Item5

2.18

1.29

4

0.46

0.42

0.66

0.48

Item6

2.51

1.18

4

0.37

0.52

0.67

0.43

Item7

1.80

0.85

3

0.39

0.63

0.69

0.55

Item8

2.09

1.07

4

0.32

0.58

0.70

0.51

Item9

1.79

0.90

3

0.39

0.61

0.68

0.47

Item10

1.64

1.22

4

0.32

0.30

0.70

0.52

Item11

1.64

1.54

4

0.30

0.38

0.69

0.41

Item12

2.13

1.08

4

0.31

0.40

0.69

0.58

Item13

2.49

1.20

4

0.37

0.59

0.68

0.63

Item14

2.43

1.16

4

0.41

0.54

0.69

0.55

Item15

3.43

1.04

4

0.39

0.70

0.69

0.72

Item16

3.44

1.03

4

0.41

0.70

0.69

0.68

Item17

2.08

1.00

4

0.31

0.33

0.70

0.42

Item18

2.34

1.40

4

0.33

0.52

0.70

0.51

Item19

2.25

0.87

2

0.43

0.53

0.68

0.44

Item20

2.51

1.32

4

0.41

0.54

0.68

0.36