Table 2.

Additional therapist qualifications and training risk of bias item.

Low risk of bias	High risk of bias	Unclear
Studies where the therapist had at least a moderate level of psychological therapy qualifications/training, for example a clinical psychologist a cognitive behavioral therapy (CBT) therapist a psychological wellbeing practitioner with CBT training, or in the case of the United States of America or Canada, a social worker with CBT training.	Studies where the therapist had minimal psychological therapy qualifications/training, for example an undergraduate psychology student with no further training, or a healthcare professional with no previous therapeutic experience or only a few days of CBT training.	Studies where the therapist qualifications and training are not reported, or the information is unclear.