METHODS
Research design and location. This study uses a
quasi-experimental design with two repeated surveys after the baseline.
Face-to-face interviews and telephone calls with the same patients with
unstable angina before and one month and three months after PCI were
conducted at the National Heart Institute, Vietnam.
Sample size and participants . All patients who visited
the Vietnam Heart Institute from September 2016 as baseline to February
2017 as post line and met criteria were included. Those who were
diagnosed with unstable angina (UA), received PCI in the Vietnam
National Heart Institute and agreed to participant were interviewed. The
patient was excluded if s/he had associated chronic diseases such as
cancer and COPD, or died after intervention. In total, 120 out of 127
patients were enrolled in this study, which gave a response rate of
94.5%.