Fatigue, impaired physical function and mental health in cancer survivors: the role of social isolation

Cancer survivors experience an array of physical, psychological, and social problems after treatment has ended. Perceived social isolation may exacerbate the effects of physical problems on mental health. We examined the association between physical health (cancer-related fatigue and physical function) and mental health (depression and anxiety symptoms) in cancer survivors in the first year of survivorship (i.e., up to one year after the end of treatment with curative intent), as well as the moderating role of perceived social isolation.

Survey data were collected from 118 cancer survivors who completed treatment with curative intent in the last year. We assessed mental and physical health symptoms, as well as perceived social isolation.

In multivariable analyses, fatigue was significantly associated with both depression (β = 0.279, 95% CI: 0.193,0.362) and anxiety symptoms (β = 0.189, 95% CI: 0.106,0.272). Social isolation moderated the effect of fatigue on depression and anxiety such that higher social isolation exacerbated the association of fatigue with mental health.

Cancer survivors who continue to experience fatigue after curative treatment are at risk for mental health problems, including depression and anxiety symptoms. For cancer survivors who feel socially isolated, the association between fatigue and mental health may be stronger. The current standard of care for survivorship does not sufficiently address psychosocial needs. Future research should evaluate the inclusion of social support interventions in early-term survivorship care.