Figure 2From: Performance of capnometry in non-intubated infants in the pediatric intensive care unit Comparison of sidestream CO 2 to PtcCO 2 . A: Correlation between sidestream CO2 and PtcCO2 values (r2 = 0.649). B: Bland-Altman analysis of difference in CO2 between sidestream and PtcCO2 (y-axis) versus average of measured sidestream and PtcCO2 (x-axis), bias -1.7, precision ±9.9.Back to article page