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