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Table 2 Principal Component Analysis: eigenvalues and factor loadings after oblique (direct oblimin) rotation.

From: Sense of competence questionnaire among informal caregivers of older adults with dementia symptoms: A psychometric evaluation

Item Factor 1. Satisfaction with the care recipient Factor 2. Consequences of involvement in care for the personal life of the caregiver Factor 3. Satisfaction with one's own performance
Satisfaction with one's own performance Our study Original questionnaire Our study Original questionnaire Our study Original questionnaire
1. I feel pleased about my interactions with my .... .44 .20 -.24 -.40 .20 -.79
2. I don't feel capable to care for my .... -.04 -.09 .04 -.18 .27 .63
3. I wish that my .... And I had a better relationship. .35 .06 -.07 .05 .53 .56
4. I feel guilty about my interactions with my .... -.02 .01 -.15 -.10 .68 .50
5. I feel strained in my interactions with my .... .38 .14 -.21 .29 .48 .50
6. I feel that in the past, I haven't done as much for my .... as I could have or should have. -.07 -.08 .09 -.14 .72 .49
7. It is not clear to me how much care I should give to my .... -.05 -.15 .10 -.00 .74 .40
8. I feel that my .... doesn't benefit from what I do for him/her. .00 .08 -.04 -.03 .77 .37
9. I feel nervous or depressed about my interactions with my .... -.03 .17 -.32 .30 .44 .34
10. I feel angry about my interactions with my .... .39 .28 -.33 .04 .33 .32
11. I feel that I don't do as much for my .... as I should do. .41 -.04 -.24 -.16 .25 .31
12. I feel useful in my interactions with my .... .14 -.02 .12 -.04 .32 -.28
Satisfaction with the care recipient       
13. I feel that my .... behaves the way s/he does to have her/his own way. .82 .89 -.06 .02 -.04 -.13
14. I feel that my .... behaves the way s/he does to annoy me. .83 .72 .09 -.11 -.02 .04
15. I feel that may .... tries to manipulate me. .90 .68 .13 .09 -.15 -.18
16. My .... appreciates my constant care less than the care others give him/her. .61 .60 .05 -.06 .26 .20
17. I feel that my .... makes requests, which I perceive to be over and above what s/he needs. .50 .59 -.39 .11 -.09 -.14
18. I feel resentful about my interactions with my .... .35 .49 -.35 -.03 .35 .32
19. I feel embarrassed over my .... behaviour. .24 .40 -.31 -.14 .37 .36
Consequences of involvement in care       
20. I feel that my present situation with my .... doesn't allow me as much privacy as I'd like. .08 .01 -.68 .67 -.05 -.03
21. Because of my involvement with my .... I don't have enough time for myself. -.02 -.00 -.85 .69 -.07 -.19
22. I feel that my social life has suffered because of my involvement with my .... .13 -.02 -.76 .57 .04 .05
23. I feel that I cannot leave my .... alone, he/she needs me continuously. .10 -.04 -.70 .52 -.08 -.08
24. I feel stressed between trying to give up my .... as well as to other family responsibilities, job etc. -.03 .03 -.63 .49 -.05 .18
25. I feel that my health has suffered because of my involvement with my .... -.06 -0.03 -.66 .46 .19 .20
26. I worry all the time about my .... -.30 -0.29 -.71 .44 .06 .27
27. I feel that my .... Seems to expect me to take care of him/her as if I were only one s/he could depend on. .12 .17 -.66 .37 -.16 -.16
Unrotated:       
Eigenvalue 8.39 - 3.03 - 2.02 -
Variance explained 31% - 11% - 7% -