Table 4.

Comparison of blood pressure using the Bland-Altman method

	Bias, mmHg	Limits of agreement, mmHg
R-group systolic IBP versus systolic NIBP	28.5	−2.92 to 59.58
NR-group systolic IBP versus systolic NIBP	4.1	−6.19 to 14.40
R-group diastolic IBP versus diastolic NIBP	−2.2	−23.42 to 14.81
NR-group diastolic IBP versus diastolic NIBP	−1.1	−12.5 to 10.3
R-group mean IBP versus mean NIBP	7.4	−14.98 to 29.50
NR-group mean IBP versus mean NIBP	2.3	−13.09 to 17.69

R-group, resonance group; NR-group, non-resonance group; IBP, invasive blood pressure monitoring; NIBP, non-invasive blood pressure monitoring.