Purpose
This study examined secondary benefits of an individualized physical
activity intervention on improving dementia family caregivers’
subjective burden, depressive symptoms and positive affect.
Design and Methods
A community-based randomized controlled trial (RCT) was implemented
with family caregivers of persons with dementia (N = 211) who
received the Enhanced Physical Activity Intervention (EPAI: treatment
intervention, n = 106) or the Caregiver Skill Building Intervention
(CSBI: control intervention, n = 105). Interventions were delivered
over 12 months, including a baseline home visit and regularly spaced
telephone calls. Data were collected in person at baseline, 6 and 12-months;
and telephonically at 3 and 9-months. The EPAI integrated physical activity
and caregiving content while the CSBI focused only on caregiving content.
Descriptive, bivariate and intention-to-treat analyses using generalized
estimating equations (GEE) were performed to examine secondary benefits of
the EPAI on family caregiver burden, depressive symptoms and positive
affect.
Results
Compared to caregivers in the CSBI group, caregivers in the EPAI
significantly increased their overall and total moderate physical activity
and showed a positive interaction between the intervention and time for
positive affect at both six (p = 0.01) and
12-months (p = 0.03). The EPAI was significantly
associated with improving burden at 3 months (p =
0.03) but had no significant effect on depressive symptoms.
Implications
Caregiver involvement in an individualized physical activity
intervention was associated with increased overall and total moderate
physical activity and improved positive affect from baseline to 12 months.
Improved positive affect may help caregivers to feel better about themselves
and their situation, and better enable them to continue providing care for
their family member for a longer time at lower risk to their own mental
health.