Breast cancer survivors: physical and mental quality of life 10 years following diagnosis, a case-control study.

Abstract

Improvements in diagnosis and treatment of Breast Cancer (BC) have resulted in an increase in the life expectancy of survivors and in the importance of quality of life in BC survivorship care. The current study aimed to assess the Health-Related Quality Of Life (HRQOL) of BC survivors and to investigate the association of comorbidities with HRQOL compared to a group of women with no history of cancer. Women were residents of the central district in Israel, the case group included 250 women diagnosed with BC between 1999 and 2003, with no prior cancer history and no evidence of disease after 8-12 years. The comparison group included 250 women with no cancer history, individually matched to cases by age and area of residence. Data were collected through in-person interviews, and HRQOL was assessed using the Short Form-36 (SF-36) questionnaire. Regression analyses were performed evaluating the influence of demographic, socioeconomic, lifestyle characteristics and comorbidities on physical and mental HRQOL. The physical and mental summary scores means, were 48.5 ± 11.1 and 49.2 ± 10.8 compared to 51.5 ± 10.2 and 50.9 ± 10.6, in BC survivors and the comparison group, respectively (p = 0.002 and p = 0.097). BC survivors and controls did not differ in number and type of comorbidities and for both groups a negative association was seen with HRQOL. Controlling for age, income, number of comorbidities, BMI and physical activity, BC survivor had decreased physical (b = -2.49, p = 0.001) and mental summary scores (b = -1.27, p = 0.18). HRQOL of BC survivors should gain more attention in the area of cancer care, especially when comorbidities are present.