 While several studies have shown that anxiety measures, including the State-Trait Anxiety Inventory (STAI), are either highly correlated or indistinguishable from depression, the BAI is shown to be less contaminated by depressive content.Since the BAI does only questions symptoms occurring over the last week, it is not a measure of trait anxiety or state anxiety.The BAI can be described as a measure of "prolonged state anxiety", which, in a clinical setting, is an important assessment.