Physical and Psychological Health Interdependence Among Dyads in Hematological Cancer

Hematological cancer impacts both patients and their caregivers. Although only patients experience direct physical effects from cancer, both patients and caregivers experience psychological effects from cancer-related stressors. Theories suggest that patient-caregiver dyads, although experiencing individual effects from cancer, may also indirectly affect one another's health. This is called interdependence.

This study investigated physical and psychological health interdependence among patient-caregiver dyads facing hematological cancer, and whether their relationship quality was a moderator of interdependence.

Thirty patient-caregiver dyads were assessed for their self-reported physical function, anxiety, and depression using the Patient-Reported Outcomes Measurement Information System and relationship quality using the Mutuality Scale. Data were analyzed using the Actor Partner Interdependence Model, a dyadic data methodology for estimating interdependence.

Individual physical and psychological health were related within both patients and caregivers. Patients and caregivers did not significantly differ in their reported depression, anxiety, or mutuality. Partner effects were detected among caregivers' anxiety and patients' physical function and depression. Mutuality did not moderate partner effects.

Findings suggest that health interdependence is present among patients with hematological cancer and their caregivers. In addition, there is a strong link between physical and psychological health within individuals, regardless of role.

Healthcare teams should consider dyadic assessment in their cancer care plans to identify risks for health decline in patients with hematological cancer and their caregivers. Assessment of caregivers, especially their anxiety levels and physical health, may yield integral information about the patients' physical and psychological health status.