Impact of different adjuvant therapy strategies on quality of life in breast cancer survivors

Abstract

Little is known about the long-term effects of adjuvant therapy on quality of life, sexual functioning and symptoms in breast cancer survivors. Between January 1996 and June 1997, we surveyed 1098 women who had been diagnosed with early stage breast cancer between 1 and 5 years earlier. The breast cancer survivors were recruited in two large metropolitan centers in the USA. They completed a survey battery that contained standardized measures of health-related quality of life (HRQL), depression, body image, sexual functioning, and symptoms. A total of 1096 had usable responses for these analyses. In this sample, n = 356 had received tamoxifen (TAM) alone, n = 180 received chemotherapy (CHEM) alone, n = 395 received CHEM + TAM, and n = 265 received no adjuvant therapy (NO RX). There were significant differences in the mean age of each group, with the TAM group being the oldest (mean 62.6 years) and the CHEM group being the youngest (mean 46.8 years). Both age and time since diagnosis were controlled for in all statistical analyses. We found no significant differences in global quality of life among the four treatment groups. For the MOS-SF-36, there were no significant differences on the subscale scores except for the physical functioning subscale (p = 0.0002); the NO RX group had the highest functioning. There were no significant differences in depression scores among the four treatment groups. The MOS-SF-36 physical functioning composite score differed by treatment group (p = 0.012); the NO RX group had a physical functioning composite score that was at the mean for a normal healthy population of women, while those in the adjuvant treatment groups scored slightly lower. The mental health composite score was not significantly different among the four treatment groups and approximated scores from the normal population of healthy women. There were no differences in body image scores among the four treatment groups; however, sexual functioning scores did differ (p = 0.0078) with patients receiving chemotherapy (either alone or with tamoxifen) experiencing more problems. Hot flashes, night sweats, and vaginal discharge differed by treatment (p = 0.0001); all symptoms were reported more often in breast cancer survivors on tamoxifen. Vaginal dryness and pain with intercourse also differed significantly by adjuvant treatment, occurring more often in survivors treated with chemotherapy. Overall, breast cancer survivors function at a high level, similar to healthy women without cancer. However, compared to survivors with no adjuvant therapy, those who received chemotherapy have significantly more sexual problems, and those treated with tamoxifen experience more vasomotor symptoms.