Duke Activity Status Index (DASI) Calculator

Duke Activity Status Index Explanation and Clinical Context The Duke Activity Status Index is a validated self administered questionnaire used to estimate functional capacity and cardiorespiratory fitness by quantifying a patient's ability to perform common daily and recreational activities. The total score represents a surrogate measure of maximal oxygen consumption which correlates strongly with peak VO2 measured during cardiopulmonary exercise testing. DASI provides clinicians with an efficient way to assess functional status in outpatient and pre operative settings especially when formal exercise testing is unavailable.

A higher score reflects better functional capacity while lower values may indicate underlying cardiovascular limitation such as heart failure ischemic heart disease or deconditioning. DASI is widely applied for prognostic assessment because reduced functional capacity is associated with increased mortality risk hospitalization and adverse perioperative outcomes. It is also useful for monitoring clinical change over time and evaluating response to treatment.

The conversion formula commonly used to estimate peak oxygen consumption is peak VO2 equals zero point forty three times DASI score plus nine point six and this relationship has been validated across multiple populations. In clinical practice the DASI score enhances risk stratification supports exercise prescription and helps identify patients who may benefit from further diagnostic evaluation.