Blended Acceptance and Commitment Therapy Versus Face-to-face Cognitive Behavioral Therapy for Older Adults With Anxiety Symptoms in Primary Care: Pragmatic Single-blind Cluster Randomized Trial

Maartje Witlox   ¹ ;   Nadia Garnefski   ¹ ;   Vivian Kraaij   ¹ ;   Margot W M de Waal   ² ;   Filip Smit   ^{3, 4, 5} ;   Ernst Bohlmeijer   ⁶ ;   Philip Spinhoven   ¹

¹ Faculty of Social and Behavioural Sciences, Section of Clinical Psychology, Institute of Psychology, Leiden University, Leiden, Netherlands

² Department Public Health & Primary Care, Leiden University Medical Center, Leiden, Netherlands

³ Department of Mental Health & Prevention, Netherlands Institute of Mental Health and Addiction, Utrecht, Netherlands

⁴ Department of Clinical, Neuro and Developmental Psychology, Vrije Universiteit, Amsterdam, Netherlands

⁵ Department of Epidemiology & Biostatistics, Amsterdam University Medical Centers, VU University Medical Center, Amsterdam, Netherlands

⁶ Department of Psychology, Health and Technology, University of Twente, Enschede, Netherlands