BAI is a self-report questionnaire measuring 21 common somatic and cognitive symptoms of anxiety.It consists of 21 items with a Likert scale ranging from 0 to 3 and raw scores ranging from 0 to 63. It was developed in 1988 and a revised manual was published in 1993 with some changes in scoring. The BAI scores are classified as minimal anxiety (0 to 7), mild anxiety (8 to 15), moderate anxiety (16 to 25), and severe anxiety (30 to 63). 
Year: 1988 Authors: Beck et al Disease: COPD Outcome: Coping with the disease, including depression and anxiety
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Measure: Anxiety
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Number of RCTs that used this tool (in our study): 4
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Scale: Lower scores are better, scores range 0-63 Reference: Beck, A. T., Epstein, N., Brown, G., & Steer, R. A. (1988). An inventory for measuring clinical anxiety: psychometric properties. Journal of consulting and clinical psychology, 56(6), 893–897. 
Target population: General population Focus Generic Notes Because the instructions for the BAI are written at an 8.3 grade level, oral instructions should be given to persons with lower reading skills. Translations available: Yes Original version validated: Yes Original language: English Form of delivery: Self-reported Licence needed: Yes 10.1037//0022-006x.56.6.893