Objective:to construct and validate the contents of the Self-care Assessment instrument for
patients with type 2 diabetes mellitus. Method:methodological study, based on Orem's General Theory of Nursing. The empirical
categories and the items of the instrument were elucidated through a focus group.
The content validation process was performed by seven specialists and the semantic
analysis by 14 patients. The Content Validity Indices of the items, ≥0.78, and of
the scale, ≥0.90, were considered excellent. Results:the instrument contains 131 items in six dimensions corresponding to the health
deviation self-care requisites. Regarding the maintenance, a Content Validity
Index of 0.98 was obtained for the full set of items, and, regarding the
relevance, Content Validity Indices ≥0.80 were obtained for the majority of the
assessed psychometric criteria. Conclusion:the instrument showed evidence of content validity.