This is a protocol for a Cochrane Review (Intervention). The objectives are as follows:1. To assess the e icacy and feasability of CBT (CT, BT, CBT and third wave CBT interventions) for di erent anxiety disorders in older adults aged 55 years or over compared with minimal management 2. To assess the e icacy and feasibility of CBT (CT, BT, CBT and third wave CBT interventions) for di erent anxiety disorders in older adults aged 55 years or over compared with other psychological therapies 3. To conduct a narrative review to additionally describe trials omitted from the quantitative analysis due to missing data.