March-April 2018, Volume 13, Issue 1 DOI: 10.21859/ijnr-13012 Iranian Journal of Nursing Research (IJNR) Original Article The Relationship of Mindfulness and Perceived Self- efficacy With Subjective Well-being in Hospitalized Patients with Cancer in Tabriz, Iran Hamid Mehdi Pour 1 , Bahman Kord 2,* 1 MSc, Department of Psychology, Mahabad Branch, Islamic Azad University, Mahabad, Iran 2 Assistant Professor, Department of Psychology, Mahabad Branch, Islamic Azad University, Mahabad, Iran * Corresponding author: Bahman Kord, Assistant Professor, Department of Psychology, Mahabad Branch, Islamic Azad University, Mahabad, Iran. E-mail: kord_b@yahoo.com Received: 02 Jan 2018 Accepted: 21 Feb 2018 © 2018 Iranian Nursing Scientific Association (INA) Abstract Introduction: Subjective well-being is of the important components of mental health and identifying the factors affecting it is of great importance. Hence, the current study aimed at predicting the subjective well-being of patients with cancer based on mindfulness and perceived self-efficacy. Methods: The current descriptive-correlational study was conducted on 150 hospitalized patients with cancer in Tabriz, Iran in 2016. The subjects were selected through the convenience sampling method. Data were collected using 3 valid and reliable scales of the Molavi subjective well-being, the Baer mindfulness, and the Schwarzer self-efficacy, and analyzed by Pearson correlation coefficient and regression analysis. Results: Findings showed a significant positive correlation between mindfulness and perceived self- efficacy, and subjective well-being (sig = 0.01). Regression analysis indicated mindfulness 17.20% and perceived self-efficacy 27.00% in the study subjects. Conclusions: Increased mindfulness and perceived self-efficacy can be used to enhance subjective well-being and improve life satisfaction in patients with cancer. Hence, it is suggested to contribute psychologists in the prevention and intervention programs in order to promote mental health and subjective well-being in patients with cancer to pay special attention to self-care. Keywords: Subjective Well-being; Mindfulness, Perceived Self-efficacy; Patients with Cancer