Table 2 Principal component factor analysis with varimax rotation (eigenvalue >1 and factor loadings >0.5.)

1 I worry a lot of the time

2 I find it difficult to make a decision

3 I often feel jumpy

4 I find it hard to relax

5 I often cannot enjoy things because of my worries

6 Little things bother me a lot

7 I often feel like I have butterflies in my stomach

9 I cannot help worrying about even trivial thing

10 I often feel nervous

11 My own thoughts often make me anxious

13 I think of myself as a nervous person

20 I often feel upset

14 I always anticipate the worst will happen

15 I often feel shaky inside

16 I think that my worries interfere with my life

17 My worries often overwhelm me

19 I miss out on things because I worry too much

8 I think of myself as a worrier

12 I get an upset stomach due to my worrying

18 I sometimes feel a great knot in my stomach

Eigenvalue