Table 5 Item-total correlation analyses for the CNFDS-PL

1. Can you sleep at night without neck pain interfering?

0.61

<0.001

0.72

<0.001

2. Can you manage daily activities without neck pain reducing activity levels?

0.69

<0.001

0.78

<0.001

3. Can you manage daily activities without help from others?

0.61

<0.001

0.52

<0.001

4. Can you manage putting on your clothes in the morning without taking more time than usual?

0.65

<0.001

0.65

<0.001

5. Can you bend over the washing basin in order to brush your teeth without getting neck pain?

0.64

<0.001

0.73

<0.001

6. Do you spend more time than usual at home because of neck pain?

0.71

<0.001

0.69

<0.001

7. Are you prevented from lifting objects weighing from 2-4 kilograms due to neck pain?

0.64

<0.001

0.56

<0.001

8. Have you reduced your reading activity due to neck pain?

0.56

<0.001

0.59

<0.001

9. Have you been bothered by headaches during the time that you have had neck pain?

0.46

<0.001

0.38

0.003

10. Do you feel your ability to concentrate is reduced due to neck pain?

0.58

<0.001

0.70

<0.001

11. Are you prevented from participating in your usual leisure time activities due to neck pain?

0.50

<0.001

0.52

<0.001

12. Do you remain in bed longer than usual due to neck pain?

0.68

<0.001

0.59

<0.001

13. Do you feel that neck pain has influenced your emotional relationship with your nearest family?

0.64

<0.001

0.70

<0.001

14. Have you had to give up social contact with other people during the past two weeks due to neck pain?

0.68

<0.001

0.65

<0.001

15. Do you feel that neck pain will influence your future?

0.62

<0.001

0.65

<0.001