Introduction
Cardiovascular diseases are recognized as the first, common, and most important cause of deaths, compared to non-communicable diseases in Iran and many countries across the world (1). Among cardiovascular diseases, coronary artery disease is one of the most important diseases and health conditions in developing and developed countries, including Iran (1-3). The manifestations of this disease include a range of physical-psychological disorders, such as pain, sweating, nausea, vomiting, stress, and anxiety. Cardiovascular disorders are multifactorial illnesses and in addition to increasing age and genetic role, biological, environmental, and psychological variables are also involved in its etiology. About 17.3 million deaths worldwide occur annually due to coronary artery disease (4).
According to the American Heart Association (AHA), it is anticipated that in 2020, nearly 1 or more out of 3 Americans will suffer from this disease. Today, this disease has become a social problem in Iran with its mortality rate accounting for 6.6 deaths per 10,000 population. This disease ultimately causes disability and significant complications in patients, which is a source of great harm to the community and families (5-7). In addition, studies have shown that the prevalence of cardiovascular disease followed by the financial burden has also been rising in recent years (8, 9).
Basically, in patients with chronic diseases, such as coronary artery disease, definitive treatment of the disease is not considered a real and achievable goal. This is because these disorders are disabling due to having a long and chronic process, and many internal and external factors have effects on its aggravation and recovery, thereby affecting the quality of life of patients (10, 11). Currently, even with medication-assisted treatment and aggressive therapies on coronary arteries, its prognosis is still not satisfactory, and its prevalence is increasing (1, 2). One of the important issues in the management of chronic diseases is training and helping the patient take care of themselves; moreover, the educational programs are considered among these main issues to increase their quality of life. Considering the key role of nurses in teaching self-care behaviors, the identification of the behaviors that lead to a better quality of life in patients is one of the most important interventions and goals of nursing (12). It is important to teach the patient that its valuable and useful effects have been proven in various studies (13-17). Despite its many benefits, health care centers ignored or neglected low-cost patient education. The results of a study conducted by Ismaili showed that patient education is not well-suited in Iran so that the training program is not implemented or it is implemented in a very incomplete and irregular manner. The education of self-care behaviors can lead a person to maintain good health and well-being, thereby increasing his/her ability to self-care (18). On the other hand, compliance with self-care behaviors is important in patients with chronic illness (19). Patients can affect their comfort, functional abilities, and disease processes by acquiring self-care skills. Moreover, they can have control over their life and adapt to complications, which results in an improvement in their quality of life (5, 13, 18-20).
In addition, self-care behaviors improve the patient's abilities and help facilitate better daily activities, achieve autonomy, and therefore, perform more social functions, which leads to the patient's self-esteem. The role of self-care and patient participation in treatment is an effective factor in the improvement of the quality of life (4, 21, 22). The prevalence of coronary artery diseases is increasing, and its manifestations have adverse effects on the quality of life (23). Moreover, the effect of self-care education has been approved on the quality of life. Therefore, it is of utmost importance to encourage patient participation in self-care behavior training sessions, which leads to the improvement of life quality. With this background in mind, this study aimed to determine the effects of self-care education on the quality of life among patients with acute coronary syndrome (ACS).
Materials and Methods
This single-blind randomized clinical trial was conducted on 70 patients with ACS hospitalized in the Coronary Care Unit (CCU) of Shahid Modarres Hospital, Saveh, Iran, during 2018. The patients were selected using the available sampling and simple random allocation methods. Subsequently, they were randomly divided into two groups of control (n=35) and intervention (n=35) according to CONSORT guidelines using a card with the names of groups (A or B). It is worth mentioning that the samples were unaware of the group allocation (Figure 1).
The inclusion criteria were: 1) diagnosis of ACS, 2) age range from 20 to 60 years, 3) lack of the previous hospitalization in the CCU, 4) lack of diagnosed underlying diseases, such as tuberculosis, cancer, and hepatitis, and 5) reading and writing abilities. On the other hand, the patients with hearing impairment, and those who were transferred to another health care center or were unwilling to participate in the research procedure were excluded from the study. The data were collected using a demographic characteristics form and a Short Form (SF)-36 survey of quality of life. The SF-36 survey of quality of life has been translated into Persian and validated in previous studies by Baghiyani Moghadam (24). The items in the questionnaire seek information about the various aspects of the quality of life. This questionnaire consists of 36 phrases in 8 dimensions, including physical function (n=10), mental health (n=5), social status (n=4), physical role-play (n=4), energy and vitality (n=4), physical pain (n=2), emotional role (n=3), and general health (n=4). The total calculated scores for each patient are 100, and according to the score, the life quality is divided into levels of weak (less than 34), moderate (from 34-67), and high (over 67). The intervention was initiated 24 h after the hospitalization. At the beginning of the study, research objectives, benefits, and protocol were explained to the patients. They were then asked to complete the demographic characteristics form and SF-36 survey of the quality of life. After rest, stability, and identification of the educational needs,
