Does Early-Stage Intervention Improve Caregiver Well-Being or Their Ability to Provide Care to Persons With Mild Dementia or Mild Cognitive Impairment? A Systematic Review and Meta-Analysis

Interventions for caregivers of persons with dementia are well supported, but it remains unclear whether caregivers benefit from early-stage intervention when caring for persons with mild dementia or mild cognitive impairment (MCI). This systematic review and meta-analysis examined whether early-stage interventions for this population positively affect their well-being and ability to provide care and whether effectiveness varies based on intervention or caregiver/recipient characteristics. Searches of four databases (MEDLINE, EMBASE, PSYCINFO, and CINAHL) yielded 20,722 titles and 1,305 full texts were independently screened. Twenty-two reports representing 18 randomized controlled trial (RCT)/controlled early-stage intervention studies were included for meta-analysis, measuring a variety of outcomes for which effect sizes were calculated using standardized mean differences. Findings suggest that early-stage intervention has a small positive effect on both caregiver well-being and ability to provide care, with the largest effects observed for caregiver anxiety and caring-related distress. Moderator analyses showed no statistically significant difference in effectiveness based on type of intervention (counseling/psychotherapy, psychoeducational, or multicomponent) or individual versus group-based interventions. However, interventions that were caregiver only (vs. dyadic) had larger positive effects on caregiver well-being and ability to provide care. None of the caregiver/recipient characteristics examined (sex, type of relationship, and type of dementia) were related to the effectiveness of early-stage interventions. Although published controlled/RCT trials were limited, findings support efforts to offer early-stage interventions to caregivers of persons with mild dementia or MCI. Further research to determine what intervention types or components are most efficacious would aid the provision of optimal support for caregivers early in their caregiving trajectory.