Table 2.
Estimated Prevalence of Masked Hypertension Among US Adults With Nonelevated Clinic Blood Pressurea, National Health and Nutrition Examination Survey, 2005–2010
| Subgroup | Prevalence, % | No. of Persons, millions | ||
|---|---|---|---|---|
| Estimate | 95% CI | Estimate | 95% CI | |
| Total | 12.3 | 10.0, 14.5 | 17.1 | 14.0, 20.3 |
| Clinic blood pressure, mmHg | ||||
| <120/80 | 6.6 | 4.4, 8.8 | 5.6 | 3.7, 7.5 |
| ≥120/80–<130/85 | 17.3 | 13.6, 21.0 | 6.3 | 4.9, 7.6 |
| ≥130/85–<140/90 | 29.7 | 24.1, 35.3 | 5.2 | 4.3, 6.2 |
| Sex | ||||
| Male | 18.1 | 13.9, 22.3 | 12.1 | 9.3, 14.9 |
| Female | 7.0 | 4.8, 9.1 | 5.1 | 3.5, 6.7 |
| Age group, years | ||||
| 21–44 | 8.2 | 5.6, 10.8 | 7.2 | 4.9, 9.4 |
| 45–64 | 17.2 | 13.6, 20.7 | 7.4 | 5.9, 9.0 |
| ≥65 | 28.0 | 15.2, 40.8 | 2.5 | 1.4, 3.7 |
| Race/ethnicity | ||||
| Non-Hispanic white | 12.4 | 9.7, 15.0 | 11.7 | 9.2, 14.2 |
| Non-Hispanic black | 15.7 | 3.5, 28.0 | 2.2 | 0.5, 3.9 |
| Hispanic | 10.8 | 4.5, 17.2 | 2.3 | 0.9, 3.6 |
| Other | 9.8 | 3.0, 16.7 | 0.9 | 0.3, 1.6 |
| Diabetes | ||||
| No | 12.1 | 9.9, 14.3 | 16.1 | 13.1, 19.1 |
| Yes | 16.6 | 7.0, 26.2 | 1.0 | 0.4, 1.6 |
Abbreviation: CI, confidence interval.
a Defined as clinic systolic/diastolic blood pressure < 140/90 mmHg (average of 3 readings taken at a single clinic visit). Persons with a history of cardiovascular disease, use of antihypertensive medication, or age <21 years were excluded.