Table 1.

Major Ambulatory Blood Pressure Phenotypes

Phenotype	Usual Definition
Sustained normotension	Office BP is not elevated AND 24-hour ambulatory BP average is <130/80 mm Hg
White-coat hypertension	Office BP is elevated BUT 24-hour ambulatory BP average is <130/80 mm Hg
Masked hypertension	Office BP is not elevated BUT 24-hour ambulatory BP average is ≥130/80 mm Hg (or awake average is ≥135/85 mm Hg)
Sustained hypertension	Office BP is elevated AND 24-hour ambulatory BP average is ≥130/80 mm Hg (or awake average is ≥135/85 mm Hg)
Nocturnal hypertension	Sleep BP average ≥120/70 mm Hg
Nondipping	Sleep BP average decreases less than 10% relative to awake ambulatory BP average
High (average real) variability	Average absolute difference between consecutive readings over the 24 hours; “high” variability usually defined as the highest percentile (e.g., quartile) in the sample