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

Figure 2. Bland Altman Plot of the agreement between LCI N2 and LCISF6 in a) healthy controls and b) subjects with Cystic Fibrosis.

Figure 2

The solid horizontal line represents the mean difference, and the dashed lines represent the limits of agreement (mean difference+/−2SD). In health, there was good agreement between the systems, the mean difference (LCIN2−LCISF6 was 0.61 (95% CI 0.45 to 0.78), limits of agreement (−0.7 to 1.9)); whereas in CF there was an obvious bias (mean difference = 1.41 (95% CI 0.92 to 1.90), limits of agreement (−2.4 to 5.2)) such that LCIN2 increased disproportionately to LCISF6 as mean LCI increased.