Fig 2. Boxplots of calculated and published measures of test performance of anaerobic threshold in identification of individuals who suffer specific post-operative complications (n = 17 Studies).

Results are across heterogeneous surgical populations and use a variety of cut-offs and outcome definitions. A: Performance for identification of Mortality (up-to 30 day postoperatively), B: Cardiorespiratory complications (alone and/or in combination), C: Unplanned ICU admission. For source data see Table 2.