“…While some studies found the interventions to be effective (e.g., [ 23 , 24 , 25 , 26 ]), others found no significant difference between the intervention and control groups (e.g., [ 27 , 28 , 29 , 30 ]). Still, others found partial support for the telephone interventions that were limited to certain subgroups of caregivers (e.g., [ 31 , 32 ]) or at certain follow-up points (e.g., [ 33 , 34 , 35 , 36 ]) regarding depressive symptoms. However, some studies had significant results in other outcomes, such as a high percentage of complete or partial attainment [ 33 ], an improvement in well-being [ 34 , 35 , 36 ], coping with the care situation [ 34 , 36 ], perceived health [ 34 ], physical health [ 35 , 36 ], quality of life [ 35 ], the behavior of the care recipient [ 36 ], and a reduction in physical complaints [ 34 , 35 ].…”