Integration of the Duke Activity Status Index into preoperative risk evaluation: a multicentre prospective cohort study

Br J Anaesth. 2020 Mar;124(3):261-270. doi: 10.1016/j.bja.2019.11.025. Epub 2019 Dec 19.

Abstract

Background: The Duke Activity Status Index (DASI) questionnaire might help incorporate self-reported functional capacity into preoperative risk assessment. Nonetheless, prognostically important thresholds in DASI scores remain unclear. We conducted a nested cohort analysis of the Measurement of Exercise Tolerance before Surgery (METS) study to characterise the association of preoperative DASI scores with postoperative death or complications.

Methods: The analysis included 1546 participants (≥40 yr of age) at an elevated cardiac risk who had inpatient noncardiac surgery. The primary outcome was 30-day death or myocardial injury. The secondary outcomes were 30-day death or myocardial infarction, in-hospital moderate-to-severe complications, and 1 yr death or new disability. Multivariable logistic regression modelling was used to characterise the adjusted association of preoperative DASI scores with outcomes.

Results: The DASI score had non-linear associations with outcomes. Self-reported functional capacity better than a DASI score of 34 was associated with reduced odds of 30-day death or myocardial injury (odds ratio: 0.97 per 1 point increase above 34; 95% confidence interval [CI]: 0.96-0.99) and 1 yr death or new disability (odds ratio: 0.96 per 1 point increase above 34; 95% CI: 0.92-0.99). Self-reported functional capacity worse than a DASI score of 34 was associated with increased odds of 30-day death or myocardial infarction (odds ratio: 1.05 per 1 point decrease below 34; 95% CI: 1.00-1.09), and moderate-to-severe complications (odds ratio: 1.03 per 1 point decrease below 34; 95% CI: 1.01-1.05).

Conclusions: A DASI score of 34 represents a threshold for identifying patients at risk for myocardial injury, myocardial infarction, moderate-to-severe complications, and new disability.

Keywords: Duke Activity Status Index; cardiopulmonary fitness; functional capacity; perioperative risk; postoperative complications; preoperative evaluation; surgery.

Publication types

  • Multicenter Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Biomarkers / blood
  • Exercise Tolerance / physiology*
  • Female
  • Health Status
  • Health Status Indicators*
  • Humans
  • Male
  • Middle Aged
  • Myocardial Infarction / etiology
  • Myocardial Infarction / mortality
  • Natriuretic Peptide, Brain / blood
  • Peptide Fragments / blood
  • Postoperative Complications / mortality
  • Preoperative Care / methods*
  • Prognosis
  • Prospective Studies
  • Risk Assessment
  • Risk Factors
  • Self Report
  • Surveys and Questionnaires

Substances

  • Biomarkers
  • Peptide Fragments
  • pro-brain natriuretic peptide (1-76)
  • Natriuretic Peptide, Brain