Psychometric Properties of C-CSES in CHD

Phase two of the study, which tested the psychometric properties of the C-CSES, was conducted on a convenience sample of Chinese patients with CHD at a university-affiliated hospital in Shiyan City, Hubei province, China from December 2015 to December 2016. Inclusion criteria were patients who (1) had a confirmed clinical diagnosis of CHD, (2) were able to read and understand Chinese, and (3) aged 18 years old or above. Those who had known major psychiatric disorders and other severe diseases (e.g., advanced cancer, end stage renal failure, etc.) were excluded.
The ratio of the number of subjects per item is an acceptable method to calculate the sample size needed to conduct factor analysis. Everitt [18 (link)] proposed that the minimum ratio of number of subjects per item should be 10:1. In this study, a ratio of 15 subjects per item was used to determine the sample size, and, accordingly, a total of 195 participants would be needed.
Ethics approval was obtained from the hospital’s ethics committee. All eligible patients were informed of the purpose and procedure of this study and their right to withdraw from the study at any time without affecting their treatment and nursing care. Their privacy was assured and maintained. Participants’ written informed consents were obtained.