The Gottfries-Bråne-Steen Scale: Validity, Reliability and Application in Anti-Dementia Drug Trials

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Abstract
Neuropsychological investigation using a comprehensive rating scale is important for the diagnosis and evaluation of dementia patients over time. Requirements for such a scale include accuracy, reliability, sensitivity of the scale over the disease course and simplicity for clinical use by a wide range of healthcare professionals. Ideally, the scale should also be capable of assessing the impact of pharmacological and non-pharmacological treatment regimens on the management of dementia patients. The Gottfries-Bråne-Steen (GBS) Scale is a comprehensive global assessment tool for evaluating dementia symptoms and is based on a semi-structured interview and observation of the patient. The scale consists of subscales measuring intellectual (12 items), emotional (3 items) and activities of daily living, primarily items of self-care (6 items); as well as 6 items of behavioral and psychological symptoms of dementia. This review describes the reliability, validity and sensitivity of the most recent version of the GBS scale since its original publication in 1982.

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