Effects of social relationships on survival for women with breast cancer: a prospective study.

In this study we examine the relationship between a woman's social contexts at the time of diagnosis and her chances of having survived breast cancer four years later. A cohort of 133 women were followed prospectively after initial diagnosis and treatment and data were obtained from a questionnaire mailed soon after diagnosis and from hospital charts. Using multivariate methods to examine predictors of survival, two clinical factors, pathologic nodal status and clinical stage of disease, were significantly associated with survival. In addition we found significant and independent effects on survival of: number of supportive friends, number of supportive persons, whether the woman worked, whether she was unmarried, the extent of contact with friends and the size of her social network. Thus, the woman's social context, particularly contexts of friendship and work outside the home, are statistically important for survival. Using existing literature, further data analyses and interviews with some survivors, we speculate on the ways in which social contexts may influence survival and suggest research methods suitable to this question.