Blood Pressure Measurements with Different Currently Available Methods in Elderly Hypertensive Hospitalized Patients: A Real World Cross-Sectional Study
Table 2
Overall agreement of systolic (SBP) and diastolic (DBP) blood pressures comparing the tested measurement methods with mean daytime 24hBPM (mean difference, rank correlation, limits of agreement, and rank correlation from the Bland & Altman plot).
Method
SBP±SD
Mean Difference
Standard Error
p value
Correlation R2
p value
Bias Limits of Agreement 95%
Bland& Altman Plot r
p value
Physician vs. 24hBPM
134.0 ± 23.1vs 128.9 ± 18.5
-5.13
2.03
0.125
0.642
0.001
-5.1 (-40.1 to 30.3)
-0.28
0.011
Nurse vs. 24hBPM
136.2 ± 15.1vs 128.9 ± 18.5
-7.34
1.42
0.007
0.734
0.001
7.34 ( -17.9 to 32.6)
-0.28
0.019
Patient vs. 24hBPM
130.4±17.6 vs 128.9 ± 18.5
-1.52
1.71
0.596
0.645
0.001
1.5 (-28.9 to 31.9)
0.06
0.573
Beat-to-beat vs. 24hBPM
151.1 ± 25.1 vs 128.9 ± 18.5
-22.27
2.39
<0.001
0.557
0.001
22.2 (-64.9 to 20.3)
0.35
0.002
Method
DBP±SD
Mean Difference
Standard Error
p value
Correlation R2
p value
Limits of Agreement 95%
Bland& Altman Plot r
p-value
physician vs. 24hBPM
76.7 ± 14.9 vs 73.3 ± 10.3
-3.4
1.40
0.096
0.564
0.001
-3.4 (-28.3 to 21.5)
-0.42
<0.001
nurse vs. 24hBPM
77.9 ± 9.3 vs 73.3 ± 10.3
-4.7
1.05
0.003
0.549
0.001
4.7 (-14.0 to 23.4)
-0.12
0.307
patient vs. 24hBPM
73.8 ± 11.4 vs 73.3 ± 10.3
-0.58
1.19
0.737
0.540
0.001
0.6 (-20.4 to 21.5)
0.13
0.252
Beat-to-beat vs. 24hBPM
84.8 ± 15.5 vs 73.3 ± 10.3
-11.5
1.72
<0.001
0.351
0.001
11.5 (-19.2 to 42.24)
0.41
0.002
24hBPM: 24 h blood pressure monitoring; BP: blood pressure; DBP: diastolic blood pressure; SBP: systolic blood pressure; SD: standard deviation. Notes.p<0.05; BP expressed in mmHg
