Table 4. Correlation between test and retest responses (item by item and total score) and Cronbach’s alpha coefficient (α) for Diabetes Empowerment Scale – Short Form. Brazil, 2015.

Questions	Spearman’s Correlation Coefficient – test and retest	Cronbach’s alpha if the item is removed	95%CI
1	0.24	0.709	0.561–0.803
2	0.28	0.602	0.449–0.709
3	0.10	0.592	0.424–0.710
4	0.51	0.585	0.419–0.692
5	0.18	0.595	0.453–0.700
6	0.51	0.542	0.377–0.662
7	0.40	0.577	0.400–0.687
8	0.06	0.606	0.457–0.711
Total score	0.47	0.634	0.494–0.737