Methods: This cross-sectional study was conducted on 300 thalassemia patients. The data were collected using Miller hope scale, spiritual intelligence scale, and personal resource questionnaire. The data were analysed using Pearson's correlation coefficient and multiple regression analysis.

Results: The results indicated that the mean score of hope was 173.38 (standard deviation [SD] = 24.6). Besides, 86.7% of the patients showed high levels of hope. The mean score of spiritual intelligence was 134.66 (SD = 18.07). In addition, 91.7% of the patients showed moderate levels of spiritual intelligence. The mean score of social support was 127.87 (SD = 20.19) and the patients showed high social support levels. The results revealed a significant association between hope and perceived social support (r = 0.65, P < 0.001) as well as between hope and spiritual intelligence (r = 0.63, P < 0.001). Moreover, perceived social support (b = 0.43, P < 0.001) and spiritual intelligence (b = 0.37, P < 0.001) were the predictors of hope among thalassemia patients.