Figure 2

a) Intra and inter-observer variability for the fractal technique and the comparator criteria for LVNC represented as 1 - Fleiss' κ (vertical lines represent 1 - CI). Variability of binary outcome data was greatest for the Jacquier method. Fractal analysis performed most reproducibly across the three populations. b) Likelihood ratios graph showing true positive rate (y axis) plotted against false positive rate (x axis) for the three CMR techniques. The fractal method shows better all-round diagnostic ability compared to the other two tests. LVNC indicates left ventricular noncompaction; κ, kappa; CI, confidence interval; CMR, cardiovascular magnetic resonance; LR, likelihood ratio. Other abbreviations as in Figure 1.