Table 2. Prevalence Estimates of Hypertension in the 2006–2007 Washington Adult Health Survey (WAHS) and the 2007 Washington Behavioral Risk Factor Surveillance System (WA-BRFSS).
| Characteristic | n | Weighted % (95% CI) |
|---|---|---|
| Self-reported hypertensiona | ||
| WAHS | 221 | 33.4 (29.4–37.7) |
| WA-BRFSSb | 8,619 | 28.1 (27.4–28.8) |
| WAHS only | ||
| Examination-based hypertension | ||
| Primary measure (includes participants classified as definite or probable) | 200 | 29.4 (25.8–33.4) |
| Secondary measurec | 207 | 31.1 (27.3–35.1) |
| Hypertension classificationd | ||
| Definite | 101 | 14.6 (11.7–18.2) |
| Probable | 99 | 14.8 (12.2–17.7) |
| Possible | 26 | 4.3 (2.6–7.1) |
| Probable no | 37 | 6.1 (4.1–9.0) |
| Definite no | 409 | 60.1 (55.9–64.3) |
Abbreviation: CI, confidence interval.
a Includes participants who reported that a health care provider had ever told them that they had high blood pressure.
b Includes nonpregnant participants aged 25 years or older to allow comparison with WAHS data.
c Similar to the measure used in the National Health and Nutrition Examination Survey (16): measured systolic blood pressure of 140 mm Hg or more, measured diastolic blood pressure of 90 mm Hg or more, or self-reported use of medication to control blood pressure based on answering yes to questions asking whether participants had been told to take prescribed medicine and whether they were following this advice.
d Categories are mutually exclusive; participants classified at higher levels of certainty were not considered for lower levels. See Methods section for definitions of each category.