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. 2013 Feb 15;8(2):e56868. doi: 10.1371/journal.pone.0056868

Figure 3. Bland Altman Plot of the agreement between FRC N2 and FRCSF6 in a) healthy controls and b) subjects with Cystic Fibrosis.

Figure 3

The solid horizontal line represents the mean difference, and the dashed lines represent the limits of agreement (mean difference+/−2SD). FRC was crudely corrected for body size (FRC/height*100). In health N2 produced higher values of FRC; the mean difference (FRCN2−FRCSF6) was 0.21 (95%CI 0.16; 0.25), limits of agreement (−0.15; 0.56) with no bias observed between systems. In CF the mean difference was 0.33 (95%CI 0.27; 0.38), limits of agreement (−0.11; 0.76) with the difference between systems becoming disproportionately greater with higher adjusted FRC.