Fig. 1
From: Accuracy of cuff blood pressure and systolic blood pressure amplification
Bland-Altman plots of differences between cuff SBP (top) and cuff SBP corrected with SBP amplification (bottom) and invasive brachial SBP. Dashed lines represent the lines of best fit. Solid lines are mean difference ± 2 SDs. Bland-Altman plots show wide scatter and evidence of systematic bias for greater underestimation of invasive brachial SBP with increasing level of BP, but the slope of this association was significantly attenuated when cuff SBP was corrected by adding individual corresponding SBP amplification (r = −0.27 vs. r = −0.09, z = 5.25, p < 0.0001). There was a significant improvement in the mean difference between standard cuff and corrected cuff SBP from invasive brachial SBP (−7.6 ± 11.9 mmHg vs. −0.30 ± 11.4 mmHg, p < 0.001)
