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Table 2 Office blood pressure recordings and ambulatory blood pressure monitoring parameters of the participants according to blood pressure variability

From: Blood pressure variability and its association with echocardiographic parameters in hypertensive diabetic patients

  Total sample Low variability High variability P
(n = 305) (n = 148) (n = 157)
Office SBP (mmHg) 143.0 ± 19.3 139.9 ± 17.5 146.0 ± 20.6 0.006
Office DBP (mmHg) 82.0 ± 10.6 81.4 ± 10.6 82.6 ± 10.7 0.355
24 h-ABPM SBP (mmHg) 130.6 ± 16.9 128.3 ± 14.7 132.9 ± 18.6 0.019
24 h-ABPM DBP (mmHg) 76.5 ± 9.3 75.7 ± 10.0 77.3 ± 8.6 0.144
Daytime 24-ABPM SBP (mmHg) 133.7 ± 15.9 130.5 ± 14.5 136.9 ± 16.7 <0.001
Daytime 24-ABPM DBP (mmHg) 78.9 ± 10.0 77.9 ± 10.4 79.9 ± 9.7 0.080
Nighttime 24-ABPM SBP (mmHg) 124.0 ± 18.3 122.6 ± 18.4 125.5 ± 18.2 0.169
Nighttime 24-ABPM DBP (mmHg) 69.6 ± 10.7 69.8 ± 11.2 69.5 ± 10.4 0.817
Time-rate index SBP (mmHg/min) 0.557 ± 0.116 0.459 ± 0.058 0.648 ± 0.075 <0.001
SD SBP (mmHg) 12.60 ± 4.40 11.37 ± 4.24 13.76 ± 4.25 <0.001
CV SBP (%) 9.97 ± 6.29 8.89 ± 3.16 10.99 ± 8.10 0.003
  1. The comparison groups were defined by the median of time-rate index of 24 h systolic BP and classified as low and high variability of time-rate index: values ≤ 0.54 or ≥ 0.55, respectively
  2. BP blood pressure, ABPM ambulatory blood pressure monitoring, SBP systolic blood pressure, DBP diastolic blood pressure, SD SBP standard deviation of mean SBP, CV SBP coefficient of variability SBP
  3. Data are expressed as mean ± standard deviation. Comparisons (low variability vs. high variability) were tested by Student t test