A comparison of blood pressure and pulse pressure values obtained by oscillometric and central measurements in hypertensive patients

Figures & data

Table I. Demographic features, drugs and the results of the difference between oscillometric blood pressure (BP) measurement and central BP.

	ISH (n=70)	MHT (n=45)	p
Age	58.6±6.6	57.9±8.6	0.66
BMl	30.6±5.6	29.8±4.7	0.50
Arm circumference	29.0±3.6	28.8±3.3	0.73
Diabetes mellitus, n (%)	25 (35.7)	14 (31.1)	0.20
Smoking	22 (31.4)	11 (24.4)	0.22
Female gender, n (%)	30 (42.8)	20 (44.4)	0.41
CAD	36 (51.4)	22 (48.9)	0.46
Drugs, n (%)
ACE-I/ARB, n (%)	39 (55)	28 (62)	0.62
Diuretics, n (%)	42 (60)	32 (71)	0.32
Ca antagonist, n (%)	31 (44)	24 (53)	0.45
other	4 (5)	1 (2)	0.17
No medications, n (%)	10 (14)	7 (15)	0.19
Central SBP	178.6±12.5	179.4±14.0	0.78
Central DBP	77.2±7.6	95.5±5.4	0.001
Upper arm SBP	168.3±18.4	174.0±14.1	0.17
Upper arm DBP	83.4±9.4	95.8±11.5	0.001
Wrist SBP	159.2±18.5	163.8±25.4	0.29
Wrist DBP	83.2±10.5	94.4±11.5	0.001
Central PP	101.3±13.7	83.6±16.3	0.001
Fractional PP	0.91±0.12	0.67±0.13	0.001
Mean central arterial BP	110.9±7.0	123.4±10.5	0.001
Mean SBP difference between upper arm-aorta	−5.0±15.7	−3.0±16.1	0.58
Mean SBP difference between wrist-aorta	−19.0±14.1	−15.5±13.9	0.15
Mean DBP difference between upper arm-aorta	6.8±10.2	1.0±11.3	0.04
Mean DBP difference between wrist-aorta	6.0±10.6	− l.lztl 1.0	0.001
Mean PP difference between upper arm-aorta	12.8±11.5	3.5±12.8	0.001
Mean PP difference between wrist-aorta	25.2±14.4	14.2±14.1	0.001
Mercury sphygmomanometer SBP	167.0±16.2	170.4±20.0	0.31
Mercury sphygmomanometer SBP	83.5±8.5	92.4±9.6	0.001

ISH, isolated systolic hypertension; MHT, mixed hypertension; BMI, body mass index; CAD, coronary artery disease; ACE-I, angiotensin-converting enzyme inhibitor; ARB, angiotensin receptor blocker; SBP, systolic blood pressure; DBP, diastolic blood pressure; PP, pulse pressure.

Figure 1. (a) A comparison of the systolic blood pressure (SBP) difference between central and oscillometric blood pressure (BP) measurements; (b) the mean diastolic blood pressure (DBP) difference between central and oscillometric BP measurements in patients with isolated systolic hypertension (ISH) compared with the mixed hypertension (MHT) group; (c) pulse pressure difference between aortic and upper arm oscillometric measurements in patients with ISH and MHT; (d) pulse pressure difference between aortic and wrist oscillometric measurements in patients with ISH and MHT.

Table II. Correlation between central blood pressure (BP) devices and BP difference between central and oscillometric measurements.

Group and BP differences	Mean central arterial BP (r)	PP (r)	Fractional PP (r)
ISH
Mean SBP difference between upper arm-aorta	−0.174	−0.188	−0.044
Mean SBP difference between wrist-aorta	−0.217	0.113	0.182
Mean DBP difference between upper arm-aorta	−0.389**	0.310*	0.424**
Mean DBP difference between wrist-aorta	−0.235*	0.287*	0.381**
MHT
Mean SBP difference between upper arm-aorta	−0.468**	−0.448**	−0.400*
Mean SBP difference between wrist-aorta	−0.245	−0.256	−0.210
Mean DBP difference between upper arm-aorta	−0.231	−0.161	−0.096
Mean DBP difference between wrist-aorta	0.184	0.317*	0.419**

*Correlation is significant at the 0.05 level (two-tailed).

**Correlation is significant at the 0.01 level (two-tailed).

r=correlation coefficient obtained by Spearrman's correlation analysis. ISH, isolated systolic hypertension; SBP, systolic blood pressure; DBP, diastolic blood pressure; MHT, mixed hypertension.