ABSTRACT Quality of life (QoL) has been considered worthy of assessment in the treatment, prevention and rehabili- tation of cancer patients. As it has a psychological dimension, is important to investigate the relationship between quality of life and psychological concepts like self-efficacy and psychological well-being. Ob- jective of the present study is to examine the QoL, self-efficacy and psychological well-being in adults with cancer. Methods: 50 patients completed self-report questionnaires: WHOQOL-bref, General Self- Efficacy Scale and GHQ-12 in two periods (T1 = timeline; T2 = follow up 1 year later). A paired t-test did not identify significant differences in the QoL self-efficacy and psychological well-being between T1 and T2. However, men had a better overall QoL and in the physical and social dimensions, and psycho- logical well-being in T1 compared with the women. In T2 there were significant differences between men and women only in the social and psychological dimensions of the QoL. The self-efficacy in T2 was the only predictive variable of the QoL in T2, explaining 71.9% of its variance. It is concluded that, in the pe- riod of one year, the QoL, psychological well-being and self-efficacy were stable, but gender differences were identified. The variables measured in T1 were incapable of predicting the QoL in T2. The gender differences found in QoL and psychological well-being can be used to guide specific future interventions with these patients.
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Castro, E. , Ponciano, C. , Meneghetti, B. , Kreling, M. & Chem, C. (2012). Quality of Life, Self-Efficacy and Psychological Well-Being in Brazilian Adults with Cancer: A Longitudinal Study. Psychology, 3, 304-309. doi: 10.4236/psych.2012.34043.
 Bandura, A. (1997). Self-efficacy: The exercise of control. New York: W. H. Freeman and Company.
 Bandura, A. (2001). Social cognitive theory: An agentic perspective. Annual Review of Psychology, 52, 1-26.
 Bertan, F. C., & Castro E. K. (2009). Quality of life and cancer: A systematic literature review. Psico, 40, 366-372.
 Campbell, L. C., Keefe, F. J., Mckee, D. C., Edwards, C. L., Herman, S. H., Johnson, L. E., Colvin, O. M., McBride, C. M., & Donatucci, C. F. (2004). Prostate cancer in African Americans: Relationship of patient and partner self-efficacy to quality of life. Journal of Pain and Symptom Management, 28, 433-444.
 Fleck, M., Louzada, S., Xavier, M., Chachamovich, E., Vieira, G., Santos, L., & Pinzon, V. (2000). Application of the Portuguese version of the abbreviated instrument of quality life WHOQOL-bref. Revista de Saúde Pública, 34, 178-183.
 Goldberg, D. P. (1978) Manual for the general health questionnaire. Windsor: National Foundation for Educational Research;.
 Gouveia, V., Chaves, S. S. da S., Oliveira I. C. P. de, Dias, M. R., Gouveia, R. S. V., & Andrade, P. R. de. (2003). The use of the GHQ-12 in a general population: a study of its construct validity. Psicologia: Teoria e Pesquisa, 19, 241-248.
 Howell, R. T., Kern, M. L., & Lyubomirsky, S. (2007). Health benefits: Meta-analytically determining the impact of well-being on objective health outcomes. Health Psychology Review, 1, 83-136.
 Kreitler, S., Peleg, D., & Ehrenfeld, M. (2006). Stress, self-efficacy and quality of life in cancer patients. Psycho-Oncology, 4, 329-341.
 Kwan, M. L., Ergas, I. J., Somkin, C. P., Charles, P., Quesenberry, C. P. Jr., Alfred, Neugut, A. I., Hershman, D. L., Mandelblatt, J., Pelayo, M. P., Timperi, A. W., Miles, S. Q., & Kushi, L. H. (2010). Quality of life among women recently diagnosed with invasive breast cancer: The Pathways Study. Breast Cancer Research and Treatment, 123, 507-524. doi:10.1007/s10549-010-0764-8
 Mayo, N. E., Moriello, C., Asano M., Van der Spuy, S., & Finch, L. (2011). The extent to which common health-related quality of life indices capture constructs beyond symptoms and function. Quality of Life Research, 20, 621-627. doi:10.1007/s11136-010-9801-7
 Montazeri, A. (2008). Health-related quality of life in breast cancer patients: A bibliographic review of the literature from 1974 to 2007. Journal of Experimental & Clinical Cancer Research, 29, 27-32.
 Mrus, J. M., Williams, P. L, Tsevat, J., Cohn, S. E., & Wu, A. W. (2005). Gender differences in health related quality of life in patients with HIV/Aids. Quality of Life Research, 14, 479-491.
 Münstedt, K., Manthey, N., Sachsse, S. & Vahrson, H. (1997). Changes in self-concept and body image during alopecia induced cancer che- motherapy. Supportive Care in Cancer, 5, 139-143.
 Perkins, H. Y., Baum, G. P., Taylor, C. C., & Basen-Engquist, K. M. (2009). Effects treatment factors, comorbidities and health-related quality of life on self-efficacy for physical activity in cancer survivors. Psycho-Oncology, 18, 405-411. doi:10.1002/pon.1535
 Ramachandra, P., Booth, S., Pieters, T., Vrotsou, K., & Huppert, F. A. (2009). A brief self-administered psychological intervention to improve well-being in patients with cancer: Results from a feasibility study. Psycho-Oncology, 18, 1323-1326. doi:10.1002/pon.1516
 Rottman, N., Dalton, S. O., Christensen, J., Frederiksen, K., & Johansen, C. (2010). Self-efficacy, adjustment style and well-being in breast cancer patients: a longitudinal study. Quality of Life Research, 19, 827-836. doi:10.1007/s11136-010-9653-1
 Seidl, E. M. F., & Zannon, C. M. C. (2004). Quality of life and health: conceptual and methodological issues. Cadernos de Saúde Pública, 20, 580-588. doi:10.1590/S0102-311X2004000200027
 Semiha, A., Can, G., Durna, Z., & Aydiner, A. (2008). The quality of life and self-efficacy of Turkish breast cancer patients undergoing chemotherapy. European Journal of Oncology Nursing, 12, 449-456.
 Scholz, U., Gutiérrez-Do?a, B., Sud, S., & Schwarzer, R. (2002). Is general self-efficacy a general construct? Psychometric findings from 25 countries. European Journal of Psychological Assessment, 18, 242-251. doi:10.1027//1015-57188.8.131.52
 Schwarzer, R., Boehmer, S., Luszczynska, A., Mohamed, N. E., & Knoll, N. (2005). Dispositional self-efficacy as a personal resource factor in coping after surgery. Personality and Individual Differences, 39, 807-818. doi:10.1016/j.paid.2004.12.016
 Silva, L. C. (2008). Breast cancer and psychological suffering: Female- related aspects. Psicologia em Estudo, 13, 231-237.
 Sprangers, M. A. G., Regt, E. B., Andries, F., Van Agt, H. M., Boer, J. B. de., Foets, M., Hoevmans, N., Jacobs, A. E., Kempen, G. I., Miedema, H. S., Tijhuls, M. A., & De Haes, H. C. (2000). Which chronic conditions are associated with better or poorer quality of life? Journal of Clinical Epidemiology, 53, 895-907.
 Teixeira, M. A., & Dias, A. C. (2005). Psychometric properties of Por- tuguese version of Perceived self-efficacy by Ralph Schwarzer. Em Resumos do II Congresso Brasileiro de Avalia??o Psicológica [CD]. Instituto Brasileiro de Avalia??o Psicológica (Org.): Gramado: IBAP