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We investigated the association of pre-operative activity, reported by the Duke Activity Score Index, Short Form-12 and measured by an accelerometer worn at home, with five cardiopulmonary exercise variables: peak power; peak oxygen consumption; anaerobic threshold; and ventilatory equivalents for oxygen and carbon dioxide. Fifty patients scheduled for major surgery underwent a standard pre-operative cardiopulmonary exercise test and wore a chest-mounted triaxial accelerometer for a mean (SD) duration of 3.2 (0.4) days. The Duke Activity Score Index and six accelerometer variables were significantly correlated with all five cardiopulmonary exercise variables, Pearson correlation coefficients 0.5-0.7, p = 0.02 to p < 0.001. Our results can guide future studies that measure physical activity for pre-operative assessment and interventions.

Original publication




Journal article



Publication Date





738 - 745


ASA physical status, anaesthetic management, pre-operative evaluation, quality measures, Accelerometry, Aged, Algorithms, Anaerobic Threshold, Anesthesia, Carbon Dioxide, Exercise, Exercise Test, Feasibility Studies, Female, Heart Function Tests, Humans, Male, Oxygen, Oxygen Consumption, Respiratory Function Tests