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Table 2 The relationships between invasive and auscultatory or oscillometric BP measurements (n = 967)

From: Factors influencing the accuracy of non-invasive blood pressure measurements in patients admitted for cardiogenic shock

BP variables Systolic Diastolic Mean
Invasive BP
 Mean ± SD, mm Hg 126.2 ± 21.3 63.2 ± 10.9 84.2 ± 12.3
Auscultatory BP
 Mean ± SD, mm Hg 120.1 ± 20.5 66.9 ± 11.6 84.6 ± 12.9
Difference (auscBP – invBP)
 Mean ± SD, mm Hg −6.1 ± 11.4 3.7 ± 9.0 0.4 ± 8.2
 Percentage error of invasive BP −4.4 ± 9.0 7.0 ± 16.4 0.9 ± 10.2
 95% limits of agreement −22.3 to 13.5 −25.7 to 39.6 −19.3 to 21.1
 CCC between invBP and auscBP 0.82 (0.80–0.84) 0.65 (0.61–0.68) 0.79 (0.76–0.81)
Oscillometric BP
 Mean ± SD 120.4 ± 20.4 67.8 ± 12.1 85.3 ± 13.3
Difference (oscBP – invBP)
 Mean ± SD −5.8 ± 12.3 4.7 ± 9.3 1.1 ± 8.5
 Percentage error of invasive BP −4.1 ± 9.9 8.5 ± 18.2 1.8 ± 10.9
 95% limits of agreement −23.6 to 15.4 −19.9 to 23.7 −27.9 to 45.3
 CCC invBP and oscBP 0.80 (0.77–0.82) 0.62 (0.59–0.66) 0.77 (0.75–0.80)
  1. BP values are showed as means ± SD (median); BP unit is mm Hg; CCC, concordance correlation coefficients with 95% confidence intervals