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Figure 6 Plots of Correlation and Agreement Between IQCA and CTQCA

Overall Pearson r-coefficient is 0.82, indicating very good correlation (A). However, Bland-Altman analysis (B) showed CTQCA to have an average bias of +3.70, with 95% of the differences between invasive coronary angiography–based quantitative coronary analysis (IQCA) and CTQCA falling between –27.2 and 34.6, indicating high variability in CTQCA accuracy for individual lesions. SD = standard deviation; other abbreviations as in Figure 4.