Breast cancer patients who have strong social support are less likely to die

Patients in the study were enrolled in the Shanghai Breast Cancer Survivor Study, a large, population-based review of female breast cancer survivors in China. The Vanderbilt University Medical Centre and the Shanghai Institute of Preventive Medicine have carried out the study since 2002 under the leadership of principal investigator Xiao Ou Shu, M.D., Ph.D., professor of Medicine at VICC, and senior author of the study.

From 2002 to 2004, a total of 2,230 breast cancer survivors completed a quality of life survey six months after diagnosis and a majority responded to a follow-up survey 36 months after diagnosis. The women were asked about physical issues like sleep, eating and pain, psychological well-being, social support and material well-being. The answers were converted to an overall quality of life score.

Great social well-being pays off

During a median follow-up of 4.8 years after the initial quality of life assessment, the investigators documented participants who had died or been diagnosed with a cancer recurrence.

Six months after diagnosis, only greater social well-being was significantly associated with a decreased risk of dying or having a cancer recurrence. Compared to women with the lowest scores, women who scored highest on the social well-being quality of life scale had a 48% reduction in their risk of a cancer recurrence and a 38% reduction in the risk of death.

Emotional support was the strongest predictor of cancer recurrence. Specifically, women reporting the highest satisfaction with marriage and family had a 43% risk reduction, while those with strong social support had a 40% risk reduction and those with favourable interpersonal relationships had a 35% risk reduction.

Enhancing social support could improve disease outcomes

"We found that social well-being in the first year after cancer diagnosis is an important prognostic factor for breast cancer recurrence or death," said Epplein. "This suggests that the opportunity exists for the design of treatment interventions to maintain or enhance social support soon after diagnosis to improve disease outcomes."

While a strong social support network influenced cancer recurrence and mortality during the first year, the association tapered off and was no longer statistically significant by the third year after diagnosis. This may be related to a smaller sample size of patients who answered the questionnaire, or other factors beyond quality of life that take precedence in later years.

"Our research supports previous studies that found a benefit for breast cancer patients who have a meaningful emotional support network," said Epplein. "These results suggest that therapeutic interventions may be useful because social well-being is potentially modifiable."

Source: Vanderbilt University Medical Centre