Breast cancer is the most common and most troubling health problem in the world (
1). It is estimated that breast cancer accounts for about 30% of women’s cancer (
2). More than 1.1 million women worldwide are diagnosed with breast cancer annually and more than 410 thousand of them die of the disease (
3). The risk of breast cancer in Iranian women is 27.5 in one hundred thousand (
4).
Getting informed about having cancer is a surprising (
5) and disturbing experience for everyone (
6). Various studies have shown that there is a close connection between cancer and psychological status (
7). The crisis caused by cancer will result in imbalances and inconsistencies in body and mind and it encounters patient’s life with many psychological problems.
Psychological well-being refers to the quality of experienced life and reflects the desirable functional and psychological experience (
8). Reef has identified six factors as psychological well-being criteria: self-acceptance (the ability to see and accept your strengths and weaknesses), having purpose in life (having meaning in life), personal growth (growing one’s potentials to reality), having positive relationships with others (close and valuable ties with others), environmental mastery (the ability to set and manage daily issues of life) and finally, independence (the ability to follow the personal principles even if they disagree with social demands and traditions) (
9).
Based on research, cancer can affect person’s psychological well-being. Cancer experience may be accompanied by growth, change, discomfort, and challenges such as distress for diagnosis and treatment, death, shock, anxiety and depression, guilt and blame, feeling of isolation, and negative body image (
10). Ferrell et al. in their study stated that there are significant stressors at all stages of diagnosis, treatment, recovery, and recurrence (
11). The results of Zamani et al. study showed that cancer patients had a lower quality of life and psychological well-being than diabetics and patients with multiple sclerosis (
12).
One of the factors affecting psychological well-being is spirituality. In the heart and mind of all individuals, spirituality can be observed in religious habits and behaviors everywhere and it has a significant positive impact on their lives. Having meaning and purpose in life, enjoying social and spiritual support, sense of belonging to a top source, having a good spiritual life, etc. are the ways through which people can reduce the damage of stressful events in life (
13). Soleimani et al. (
14) concluded that religious orientation especially intrinsic one can be a strong predictor of psychological well-being. Besides, different studies have mentioned the relationship of religious beliefs (
15) and spirituality (
16) with psychological well-being.
King believes that spiritual intelligence creates a unique capacity and capability to understand the meaning of life and to reach a higher spiritual status. His four-factor model of spiritual intelligence includes critical thinking about reality of being, creating personal meaning (the ability to use physical and psychological experiences to create personal meaning and goals), transcendental consciousness (the ability to identify transcendental self-aspects, others, and the world using consciousness), and providing alertness opportunities (to enter the higher spiritual positions, including deep thought, prayer, and meditation). Spiritual intelligence represents a set of abilities and capacities of spiritual resources to be applied in daily life to enhance the adaptability of individuals (
17).
Due to the increasing number of patients with breast cancer and the importance of mental problems because of their impact on all aspects of life of patients, especially women, and the lack of a published report on the situation of psychological well-being among breast cancer patients in Iran, this study aimed to not only describe the components of psychological well-being of patients such as self-acceptance, positive relations with others, autonomy, environmental mastery, purposeful life and personal growth, but also examine their relationship with the dimensions of spiritual intelligence (critical thinking, creating personal meaning, transcendental consciousness, and expanded state of consciousness) and answer this important question: how much is the predictive power of spiritual intelligence regarding psychological well-being of women with breast cancer?