TABLE 1.
Age, blood pressure and heart rate (HR) measurements in dippers and nondippers
| Variable |
Dippers (n=31) |
Nondippers (n=16) |
P | ||
|---|---|---|---|---|---|
| Mean | SD | Mean | SD | ||
| Age, years | 54.03 | 14.95 | 62.69 | 9.80 | 0.04 |
| 24 h ABPM | |||||
| SBP, mmHg | 131 | 7.92 | 131 | 10.74 | 0.97 |
| DBP, mmHg | 77 | 9.26 | 76 | 10.79 | 0.76 |
| MAP, mmHg | 97 | 6.62 | 97 | 9.0 | 0.91 |
| HR, beats/min | 72 | 8.69 | 74 | 9.81 | 0.58 |
| SBP, mmHg | |||||
| Daytime* | 138 | 9.04 | 133 | 10.84 | 0.062 |
| Nighttime* | 116 | 7.76 | 126 | 11.75 | 0.001 |
| DBP, mmHg | |||||
| Daytime* | 83 | 10.34 | 78 | 10.57 | 0.15 |
| Nighttime* | 65 | 7.80 | 71 | 11.09 | 0.061 |
| MAP, mmHg | |||||
| Daytime* | 104 | 7.80 | 99 | 8.18 | 0.061 |
| Nighttime* | 84 | 7.40 | 92 | 10.80 | 0.008 |
| HR, beats/min | |||||
| Daytime* | 75 | 9.75 | 77 | 11.15 | 0.70 |
| Nighttime* | 66 | 8.91 | 68 | 7.94 | 0.60 |
The P-value is the level of significance at α=0.05.
*
Based on subject’s self-recorded awake/asleep periods. ABPM Ambulatory blood pressure monitoring; DBP Diastolic blood pressure; MAP Mean arterial pressure; SBP Systolic blood pressure