Table 2 Reliability of Igbo-CSQ

0.64

0.67

0.71

0.68

0.70

0.71

SEM: 2.43 MDC: 6.73

Igbo-CSQ (reinterpreting pain sensation)

Number of items: 6; Cronbach’s alpha global score: 0.81; ICC (95% CI): 0.93 (0.88, 0.96)

Cronbach’s alpha If Item Deleted

1

4

10

16

29

41

0.80

0.81

0.76

0.79

0.74

0.76

SEM: 3.58 MDC: 9.92

Igbo-CSQ (catastrophising)

Number of items: 6; Cronbach’s alpha global score: 0.85; ICC (95% CI): 0.77 (0.60, 0.87)

Cronbach’s alpha If Item Deleted

5

11

13

25

33

37

0.81

0.83

0.82

0.85

0.80

0.82

SEM: 2.51 MDC: 6.96

Igbo-CSQ (ignoring pain sensations)

Number of items: 6; Cronbach’s alpha global score: 0.66; ICC (95% CI): 0.80 (0.64, 0.89)

Cronbach’s alpha if item deleted

17

19

21

24

30

35

0.69

0.61

0.60

0.54

0.66

0.55

SEM: 2.96 MDC: 8.20

Igbo-CSQ (praying or hoping)

Number of items: 6; Cronbach’s alpha global score: 0.86; ICC (95% CI): 0.90 (0.82, 0.94)

Cronbach’s alpha if item deleted

14

15

18

22

28

36

0.83

0.82

0.86

0.84

0.83

0.86

SEM: 2.09 MDC: 5.79

Igbo-CSQ (coping self-statements)

Number of items: 6; Cronbach’s alpha global score: 0.79; ICC (95% CI): 0.91 (0.84, 0.95)

Cronbach’s alpha If Item Deleted

6

8

20

23

31

32

0.76

0.72

0.79

0.76

0.78

0.74

SEM: 2.18 MDC: 6.04

Igbo-CSQ (increased behavioural activities)

Number of items: 6; Cronbach’s alpha global score: 0.77; ICC (95% CI): 0.91 (0.84, 0.95)

Cronbach’s alpha If Item Deleted

2

7

34

39

40

42

0.76

0.78

0.75

0.67

0.70

0.71

SEM: 2.52 MDC: 6.98