Dewar, A; Tetlow, N; Stephens, R; Whittle, J; (2023) The Duke Activity Status Index compared with cardiopulmonary exercise testing in patients undergoing pre-operative assessment for cancer surgery. Anaesthesia , 78 (12) pp. 1505-1506. 10.1111/anae.16118.

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Abstract

Assessment of cardiorespiratory fitness is routinely carried out in the pre-operative period. Cardiopulmonary exercise testing (CPET) is the gold standard for assessing functional capacity [1], but in centres where CPET is not routinely performed, alternative methods are recommended such as the Duke Activity Status Index (DASI). This self-reported questionnaire equates physical activity scores with an associated metabolic equivalent of task (MET) and, thus, oxygen consumption (VO2), and was developed in heart failure patients [2]. Previous research has suggested that the DASI correlates well with fitness and has good predictive ability in the peri-operative period [3]. However, concerns remain, and it has been suggested that self-reported functional capacity should not be used as a surrogate marker of peak VO2 [4]. We hypothesised that the DASI would correlate poorly when compared with CPET-assessed peak VO2.

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