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Dyadic relationship conflict, gender, and mortality in urban hemodialysis patients
Paul L Kimmel1, Rolf A Peterson2, Karen L Weihs3
1Department of Medicine, George Washington University Medical Center, Washington, D.C.
Insights
Relationship quality impacts hemodialysis patient survival. Higher dyadic satisfaction and lower conflict reduce mortality risk in women, suggesting a link to health behaviors or neuroendocrine factors.
Area of Science:
- Psychoneuroimmunology
- Nephrology
- Sociomedical Sciences
Background:
- Dyadic satisfaction and conflict effects are poorly understood in hemodialysis (HD) patients.
- Investigating psychosocial factors like relationship quality is crucial for understanding HD patient outcomes.
Purpose of the Study:
- To determine if decreased dyadic satisfaction is linked to mortality in HD patients.
- To explore gender-specific relationships between risk factors and outcomes in this population.
Main Methods:
- 174 HD patients (primarily African-American) in long-term relationships were assessed.
- Measures included dyadic satisfaction, depression, illness perception, social support, compliance, and plasma IL-1 and beta-endorphin.
- Cox proportional hazards models analyzed mortality risks.
Main Results:
- Dyadic satisfaction correlated with beta-endorphin levels in patients.
- Correlations between psychosocial, medical, and neuroimmunologic variables differed between men and women.
- Higher dyadic satisfaction and lower conflict independently predicted decreased mortality in female HD patients.
Conclusions:
- Greater dyadic satisfaction and lower conflict are significant, independent predictors of reduced mortality in female African-American HD patients.
- These effects may be mediated by health behaviors or neuroendocrine/immunologic pathways.
- Findings highlight the importance of relationship quality in the health of hemodialysis patients, with gender-specific implications.
Abstract:
The effects of dyadic satisfaction and conflict have not been well defined in the hemodialysis (HD) population. The aim of this study was to determine whether the perception of decreased dyadic satisfaction was associated with mortality in patients treated with HD, and if so, whether there were different relationships between risk factors, and differential outcomes in men and women. A total of 174 HD patients, primarily African-Americans, involved in dyadic relationships for more than 6 mo had indices of dyadic satisfaction, depression, perception of illness effects, social support, behavioral compliance with the dialysis prescription, and plasma interleukin-1 (IL-1) and beta-endorphin levels measured. Cox proportional hazards models assessed relative mortality risks. Patients' dyadic satisfaction scores correlated with beta-endorphin levels. There was no correlation of IL-1 or beta-endorphin with any psychosocial or behavioral compliance measure in the group as a whole. Correlations between psychosocial, medical, and neuroimmunologic variables were different in men and women. For women, dyadic satisfaction correlated with beta-endorphin levels, depression, and perception of illness. Women with higher dyadic satisfaction and decreased dyadic conflict were at decreased mortality risk, but dyadic adjustment indices were unassociated with differential survival in the larger group of men. Correlations between neuroendocrine and immune markers are different in African-American male and female HD patients. Greater dyadic satisfaction and lower dyadic conflict are independently associated with decreased mortality in female African-American HD patients, of the same order of magnitude as medical risk factors. Such effects may be attributable to a relationship between dyadic satisfaction and conflict and health-related behaviors, or through an effect on neuroendocrine or immunologic status.