Long-term effects of telephone-based cognitive-behavioral intervention for family caregivers of people with dementia: Findings at 3-year follow-up

Background: Long-term outcomes are of particular importance in evaluating interventions for family caregivers of people with dementia (PwD). So far, evidence for long-term effects (>6 months postintervention) is limited to four interventions. Objective: We examined the long-term effects of Tele.TAnDem, a telephone-based cognitive-behavioral therapy (CBT) intervention, on a variety of outcomes at 3-year follow-up, the longest follow-up of any intervention study for caregivers of PwD (without continuous support). Methods: Caregivers of PwD were randomly assigned to receive Tele.TAnDem consisting of 12 sessions over 6 months (intervention group [IG]) or usual care (control group [CG]). At 3-year follow-up (i.e., 2.5 years postintervention), 29 caregivers in the IG and 22 caregivers in the CG were still caring at home for a PwD. Results: Caregivers in the IG reported significantly lower caregiver burden and higher quality of life regarding social relationships. Conclusions: Tele.TAnDem is successful in buffering detrimental effects of caregiving on caregiver burden and social relationships in the long term. The small- to medium-sized effects lie in the range of effect sizes reported in the few previous investigations. The findings add to the scant evidence that interventions yielding long-term outcomes have to date mostly been multicomponent interventions based on CBT principles with structured techniques and at least seven sessions over more than 2 months.