Table 2.

Clinic and Ambulatory Blood Pressure by Blood Pressure Category

MeasureWhite Coat Hypertension (n=1,117)Sustained Hypertension (n=4,065)Mean Difference (95% CI) [PValue]
CI = confidence interval.
Note: Values are expressed as mean (SD) or mean difference (SD).
Systolic blood pressure, mm Hg
    Clinic159.5 (13.1)168.8 (15.6)9.2 (8.2–10.2) [<.001]
    Ambulatory126.9 (6.8)156.3 (14.9)29.4 (28.5–30.3) [<.001]
    Clinic minus ambulatory32.6 (14.5)12.4 (16.7)
Diastolic blood pressure, mm Hg
    Clinic94.5 (7.5)96.6 (8.3)2.1 (1.6–2.7) [<.001]
    Ambulatory83.2 (8.0)92.3 (10.2)9.2 (8.5–9.8) [<.001]
    Clinic minus ambulatory11.3 (8.9)4.3 (9.5)