Fig. 1. Comparison of DXA and CT for cross-sectional VAT and SAT measurement in HIV.

a In HIV, there is a strong correlation between CT and DXA in the measurement of VAT (r = 0.91, P < 0.0001), although the regression line (shown with 95% confidence bands) deviates from the dotted line of unity (P < 0.05). The Bland–Altman plot for VAT demonstrates that measurement bias (DXA–CT) is progressively more negative with greater visceral fat content (P < 0.0001). Horizontal dotted lines denote the mean difference between DXA and CT, as well as the expected 95% limits of agreement. Measurement bias in individuals with the most severe visceral fat accumulation is not contained within the scope of these lines. b There is a strong correlation between CT and DXA in the measurement of SAT (r = 0.94, P < 0.0001). Unlike VAT, the regression line (shown with 95% confidence bands) does not differ from the dotted line of unity. The Bland–Altman plot for SAT demonstrates that DXA overestimates SAT consistently across the subcutaneous fat spectrum. Horizontal dotted lines denote the mean difference between DXA and CT, as well as the expected 95% limits of agreement