Psychometric testing of the Chinese version of Self-Care of Coronary Heart Disease Inventory.

Aim: To psychometrically test the Chinese version of Self-Care of Coronary Heart Disease Inventory.

Background: Self-care is a significant step to impede the progression of coronary heart disease and serves as the primary outcome in self-care interventions. In China, however, no instrument is available to measure self-care in patients with coronary heart disease. To address this gap, we introduce the Self-Care of Coronary Heart Disease Inventory into China.

Design: A cross-sectional design.

Methods: We translated the inventory into Chinese using standardized methods. Then, it was psychometrically tested on a convenience sample of 301 patients with coronary heart disease (October 2017 to May 2018). Construct validity was evaluated via exploratory factor analysis and testing hypotheses. Internal consistency reliability was measured with Cronbach's alpha or composite reliability.

Results: Both self-care maintenance and management subscales showed a two-factor structure, whereas self-care confidence subscale showed a one-dimension structure. All subscales were significantly correlated with associated variables (disease-related knowledge and perceived control). The internal consistency reliability for all three subscales was acceptable.

Conclusion: The Chinese version showed acceptable psychometric properties when applied to the sample group of this study. It is recommended for use in self-care interventions targeting coronary heart disease.