Background: Patients at the end of life and their families experience a strong emotional impact. The well-being of these patients and that of their family caregiver are related. Aim: To study the variables related with the emotional well-being of patients with and without cognitive impairment at the end of life and that of their primary family caregivers. Design: Cross- sectional study. Participants: Data was collected from 202 patients at the end of life with different diagnosis (COPD, cancer, and frail elderly) as well as from their respective 202 primary family caregivers. Results: Structural equation models indicated that the emotional state of the patients was best predicted by their functional independence and the burden of their family caregivers. In addition, the emotional state of the primary family caregiver was predicted by their burden and not by the cognitive state or the functional independence of the patient. Nevertheless, the burden of the family caregiver, which is the only variable predicting both the emotional state of the patient and that of the caregiver, was directly related with the functional independence of the patient and indirectly with the patient's cognitive state. Conclusion: The family caregiver's burden is an important factor to take into consideration when aiming to reduce the emotional distress of patients at the end of life with different diagnosis -whether or not they present significant cognitive impairment- and that of their family caregivers.
Keywords: burden; cognitive impairment; emotional well-being; end-of-life; family caregiver.