This figure shows results for 40 patients. In each patient there were 5 LDCO measurements and 5 sets of bolus thermodilution measurements. Each data point shows the average of the LDCO measurements plotted against the average of the thermodilution measurements for that patient. The interrupted line shows the line of identity. Further details of the two outliers are shown in the table. The data for this graph was taken from [Linton RAF, Band DM, O'Brien TK, Jonas MM, Leach R. Lithium dilution cardiac output measurement: a comparison with thermodilution. Critical Care Medicine 1997; 25:1796-1800].