Cross-cultural adaptation of the Caring Ability Inventory to Portuguese

Objective: Describe the cross-cultural adaptation of the Caring Ability Inventory (CAI) and its validation in Portuguese. Methods: Methodological study developed in two stages, cross-cultural adaptation, analysis of its reliability (reproducibility and internal consistency), and validity (content and construct). The sample comprised 148 informal caregivers of cancer patients and 64 nurses from a public health service. Results: In the cross-cultural adaptation of the instrument, a satisfactory content validity was observed. After the pretest, the response scale was changed from seven to five points. The intraclass correlation coefficient was 0.76 and Cronbach's alpha 0.78. Factorial analysis showed that the instrument items did not remain grouped in the original structure. However, they showed a similar internal consistency. Conclusion: The Brazilian Portuguese version of CAI was shown to be reliable and valid, but new researches are needed to study the variations observed in the factorial distribution between the tool dimensions.