There are some conversational and observational papers but no robust evidence in relation to this question (see example references). This is an area of uncertainty.
An, S.-J. L. (2017). "Parent Training Occupational Therapy Program for Parents of Children with Autism in Korea." Occupational therapy international 2017: 4741634-4741634.
Augustyn, J. and A. Wallisch (2017). "Occupational Therapy in Early Intervention: Supporting Families and Children Through Cultural Cempetency and Coaching." OT Practice 22(6): 14-17.
Bourke-Taylor, H. (2017). "Occupational therapists working with children and families: two decades of progress." Australian Occupational Therapy Journal 64: 11-13.
Casagrande, R. P., et al. (2015). "Occupational Therapy contributions in the support and assistance to families of people with mental disorders." Cad. Ter. Ocup. UFSCar (Impr.) 23(2): [427-437].
D'Arrigo, R., et al. (2019). "Parent engagement and disengagement in paediatric settings: an occupational therapy perspective." Disability And Rehabilitation: 1-12.
Davel Pickens, N. and T. Long (2016). "Occupational Therapy Practitioners Working With Caregivers in Adult Palliative Care and End-of Life Care." OT Practice 21(3): CE-1-CE-8.
Edwards, M. (2015). "Family Caregivers for People with Dementia and the Role of Occupational Therapy." Physical & Occupational Therapy in Geriatrics 33(3): 220-232.
Kuhaneck, H. M. and R. Watling (2015). "Occupational Therapy: Meeting the Needs of Families of People With Autism Spectrum Disorder." The American Journal Of Occupational Therapy: Official Publication Of The American Occupational Therapy Association 69(5): 6905170010p6905170011-6905170015.
M'Crystal-Fletcher, C. and N. McGonagle (2016). "Occupational therapy and physiotherapy community service developed more than a family support project." British Journal of Occupational Therapy 79: 60-60.
Miller Kuhaneck, H. and R. Watling (2015). "Occupational therapy: Meeting the needs of families of people with autism spectrum disorder." American Journal of Occupational Therapy 69(5): 5.
Riley, B., et al. (2017). "How Do Pediatric Occupational Therapists Implement Family-Centered Care?" American Journal of Occupational Therapy 71: 108-108.
Stoffel, A., et al. (2017). "Family Centered: Occupational Therapy's Role in Promoting Meaningful Family Engagement in Early Intervention." OT Practice 22(18): 8-13.
Walker, B. A., et al. (2017). "Identifying Effective Strategies in Occupational Therapy to Support Persons With Alzheimer's Disease and Their Caregivers." American Journal of Occupational Therapy 71: 113-113.