Psychometric testing of the hemodialysis self-management instrument (HDSMI-18): A confirmatory factor analysis.

The four latent variables (i.e. partnership, self-care, problem-solving and emotional management) were verified as dimensions of HDSMI through CFA. The construct validity of the HDSMI was improved by omitting two items, allowing one inter-item correlation and transferring the loading of one item. These modifications improved fit indices of the calibration sample. Cross-validation of the validation sample verified the construct validity of the modified HDSMI-18.