- Tries not to get sick (prevention aspect).
- If he/she is sick, he/she tends to recover (the therapeutic aspect).
B) Believes that a certain health behavior prevents him from becoming ill or reduces the severity of his current illness (or eradicates his current illness altogether).
Founders of the Health Belief Model
The model was developed in 1950 by a group of social psychologists, Hochbaum, Rosenstock, and Kegels [29], who worked in the American public health service and sought to identify inadequacies and prevent people from participating in disease prevention or diagnosis programs. The group wanted to explain why few people participate in prevention and diagnosis programs. For example, public health services sent mobile imaging units to nearby areas for free chest imaging to screen for tuberculosis. Although the service was free and provided in a comfortable environment, the program had limited success. Social psychologists examined the motivating or inhibiting factors for people to participate in the program [30].
Hochbaum et al. [29] surveyed 1,200 adults in three cities to estimate their "readiness" for lung imaging, which included information about their belief in Tuberculosis (TB) susceptibility. The perception of being at risk for TB consisted of two parts: first, the perception of being at risk for the disease, not with a mathematical probability but with a real probability for the person, and second, to what extent they accept that a person may have TB without any symptoms. Hochbaum and colleagues argued that it was wrong for people to accept that there could be a pathological problem without any clinical signs. The measurement of perceived benefits consisted of two parts: Do respondents believe that lung imaging before the onset of clinical symptoms can diagnose tuberculosis, and do participants believe early diagnosis and treatment can improve? The consequences of the disease play a role. The results of this study showed that 4 out of 5 participants in the TB screening program who believed in both questions (being at risk and benefiting from timely treatment) took the predicted action. On the other hand, 4 out of 5 people who did not believe in any of the above did not take any action on prevention. Due to the nature of this study, the researcher showed with relatively high accuracy that screening for diseases has a strong relationship with two interrelated variables: perception of risk (susceptibility to disease) and perceived benefits.
After introducing the basic concepts of this model, in 1966 [31], the official model of health belief was introduced by Rosenstock. In 1974, Becker and 1974, Maiman and Becker completed this pattern together [32].
Therefore, considering that the health belief model emphasizes the relationship between health behaviors and actions as well as the use of health services, in the beginning, this model was proposed as a structural method for expressing and predicting health behavior and prevention. It then expanded to include free TB screening programs in response to failure. This model was then adapted to examine various short-term and long-term health behaviors such as sexual risk behaviors and HIV/AIDS transmission.
The Basic Components of the Health Belief Model According to Maiman & Becker
Perceived Susceptibility/Vulnerability: It means being aware of one's vulnerability or susceptibility. Personal risk means a person's mental and probable estimate of whether or not they have the disease. How susceptible is a person to a disease? (A question from the person: Do you think you will get the same disease?)
This pattern dimension refers to a person's perception of being at risk for the disease, and the person must believe that he or she may be infected without the symptoms being apparent. For example, in terms of pattern, a person's likelihood of engaging in cancer-preventing behavior (smoking cessation, low-fat, high-fiber diet, exercise, mammography, prostate testing) depends on how much he or she believes in cancer susceptibility [33, 34].
Patients have an understanding of how vulnerable they are to the disease. People are very sensitive to diseases. And this depends on their perceptions and attitudes about the risk of the disease. Some people are at the bottom of the ranks. Some people in the middle class and some people in hypersensitivity feel the real danger of experiencing the wrong conditions or getting a disease. We have heard in our experience that some people admit that they have a predisposition to a particular disease because their parents or siblings have contracted a particular disease.
Conversely, some patients feel they are not vulnerable to a particular disease. For example, a smoker refuses to quit smoking because he has seen someone who has smoked all his life but has no problem. In this case, awareness is the key factor. It is said that a low level of awareness can be dangerous because of this perception of sensitivity. However, this does not mean that patients unaware of their condition do not have a perceived sensitivity to the disease. Patients may be worried about their mistakes, their weaknesses, their immune system, and so on [1].
Perceived Severity/Seriousness: This dimension of the model evaluates clinical medical results, based on which the rate of mortality, disability, pain due to the disease is evaluated, and the severity of the disease is determined based on the mentioned symptoms. In other words, this issue refers to the severity, severity, and seriousness of the disease [35, 36]. Having the disease can have social consequences such as: affecting work-family life and ultimately affecting social relationships. People have different perceptions about the risk of getting a disease. This case is recommended under the influence of the person's knowledge of the disease conditions and the person's ability to take action. Obviously, by understanding the seriousness of the disease, the person will perform preventive behavior [33]. For example, a person is more likely to prevent cancer if he or she believes that negative physical, psychological, and social effects may result from the disease.
Perceived Severity and Perceived Susceptibility interact. For example, a patient may have a low risk of developing bowel cancer, but because he or she realizes that the disease is very dangerous, he or she may be motivated to see a doctor for "loose stools." Or the patient may feel that the disease is so trivial that going to the surgeon is a waste of his time, so he does not go to the doctor.
Perceived benefits: It means a person's belief in the effectiveness of action in reducing the threat of disease. For example, a person who does not accept the causal link between smoking and lung cancer is less likely to quit smoking because he or she believes that smoking cessation will not prevent the disease. Once a person has accepted the susceptibility of the disease and realized its seriousness, the next step is to adopt a preventive behavior or act on the disease [1, 36].
It should be noted that the type of behavior adopted is not clear, but it is assumed that the creation of effective beliefs is effective in the person’s behavior. The person realizes that to choose a behavior that:
- First, it has the most benefits (individual, family, social, etc.).
- Secondly, it should be available in society. There are two conditions for usefulness and possibility for behavior.
Perceived barriers: In the path of health behaviors, there are costs, time, facilities, the scope of necessary changes, and an inability to understand the recommended behaviors that the individual is evaluating. Barriers are related to therapeutic characteristics and preventive measures that may be expensive, unpleasant, painful, etc. These traits may lead to a person avoiding the desired behavior. Barriers include perceived negative aspects that are potential and prevent one from performing a behavior. These aspects include:
- Cost-benefit: The person first analyzes how beneficial the health behavior is. Is it worth the money paid or the time spent?
- Side effects: Negative aspects of behavior may be potentially unpleasant, painful, uncomfortable, inappropriate, and time-consuming for the individual. These prevent behavior and affect whether or not it is done.
For example, suppose 40% of people do not return for the vaccine because of the vaccine’s side effects. In that case, it is necessary to teach mothers how to use fever-reducing drugs to reduce these side effects and explain other side effects, such as inflammation at the injection site. The mother who is aware of these issues will come for the second time of the vaccine; otherwise, the next visit will not happen due to the child's illness. Statements such as how expensive a diet change, not like a vegetarian diet, or the timing of such a meal indicates that perceived barriers appear stronger than perceived benefits and make unhealthy behaviors unlikely. In general, if the benefits of the action outweigh the obstacles, the person will take the recommended behavior.
Cues to action: To begin with, guidance and stimuli are needed. These stimuli are the accelerating forces that make a person feel the need to react. Or some factors increase the likelihood of perceiving the risk and thus taking the necessary action by reminding and warning about a potential health problem [37]. Stimuli can be triggered in various ways, including by radio and television health messages by making a phone call or sending a card based on a referral time reminder. These guides can be of internal origin (feeling tired, reminding of difficult situations). For example, angina may be an internal guide to behavior, or it may be of external origin and affect the person from the outside and cause the person to act, which are:
- Mass media (media, consulting, posters, public service advertisements, newspaper information placards, etc.)
- Interpersonal communication (like the advice of others)
For example, the illness of a spouse or the death of a parent may act as a trigger for a change in external behavior in a person who does not see himself or herself at risk. This structure operates independently of other structures. Stimuli may increase perceived sensitivity and intensity, increase benefits and motivation for change and reduce barriers, or convince individuals that they can make any change they need.
Self-efficacy: It was added to the model in 1988 [1]. Self-efficacy is the individual's belief that he or she can attempt a behavior and be successful if he/she does. The belief that the individual can perform the behavior and get positive results motivates him/her strongly. In this way, he takes action more easily than the individual with low self-efficacy. In addition to Health Belief Model, self-efficacy is among the components of many theories, such as planned behavior, maintaining motivation, and the
transtheoretical model of change. Table 1 summarizes the concepts of the health belief model and the application of each of them.