Table 4.
Comparison of ambulatory blood pressure parameters between the two groups.
| Parameters | Overall (n = 71) | Cognitive dysfunction group (n = 46) | Normal group (n = 25) | t/X2 | p value |
|---|---|---|---|---|---|
| 24hmSBP, Mean (SD)—mmHg | 140.44 ± 17.74 | 140.57 ± 19.09 | 140.19 ± 15.24 | −0.104 | 0.917 |
| 24hmDBP, Mean (SD)—mmHg | 78.88 ± 10.32 | 77.80 ± 10.76 | 80.82 ± 9.29 | 1.418 | 0.159 |
| 24hSBP-SD, Mean (SD)—mmHg | 16.79 ± 4.05 | 16.94 ± 4.43 | 16.54 ± 3.30 | −0.473 | 0.637 |
| 24hDBP-SD, Mean (SD)—mmHg | 12.33 ± 2.82 | 12.06 ± 2.96 | 12.81 ± 2.50 | 1.281 | 0.203 |
| dmSBP, Mean (SD)—mmHg | 140.82 ± 18.47 | 140.83 ± 20.11 | 140.81 ± 15.32 | −0.006 | 0.995 |
| dmDBP, Mean (SD)—mmHg | 79.55 ± 10.78 | 78.22 ± 11.23 | 81.95 ± 9.59 | 1.679 | 0.096 |
| nmSBP, Mean (SD)—mmHg | 138.36 ± 18.85 | 138.69 ± 19.52 | 137.78 ± 17.82 | −0.231 | 0.818 |
| nmDBP, Mean (SD)—mmHg | 77.39 ± 10.40 | 76.76 ± 10.33 | 78.54 ± 10.58 | 0.822 | 0.413 |
| Circadian rhythm of blood pressure—no. (%) | 2.204 | 0.564 | |||
| Dippers | 13 (18.3%) | 7 (15.2%) | 6 (24.0%) | 0.835 | 0.361 |
| Extreme-dippers | 1 (1.4%) | 1 (2.2%) | 0 (0.0%) | 0.876 | 0.999 |
| Non-dippers | 28 (39.4%) | 17 (37.0%) | 11 (44.0%) | 0.336 | 0.562 |
| Reverse-dippers | 29 (40.8%) | 21 (45.7%) | 8 (32.0%) | 1.249 | 0.264 |
SD, standard deviation; 24hmSBP, 24-h mean systolic blood pressure; 24hmDBP, 24-h mean diastolic blood pressure; 24hSBP-SD, 24-h mean standard deviation of systolic blood pressure; 24hDBP-SD, 24-h mean standard deviation of diastolic blood pressure; dmSBP, daytime mean systolic blood pressure; dmDBP, daytime mean diastolic blood pressure; nmSBP, nighttime mean systolic blood pressure; and nmDBP, nighttime mean diastolic blood pressure.