Figure 2.

Self-reported use of selected criteria for spontaneous trial pass or fail: A, Frequency each variable was selected by respondents; B, specific cut-off values self-reported by respondents (note: threshold values are reported within each bar alongside percent responses. Only respondents that selected a given variable were asked to indicate a specific cut-off value. Respondents were not forced to provide a specific cut-off value). Total responses are reported below the column label for each variable. Etco₂ = end-tidal carbon dioxide (EtCO₂).