TABLE 2.
Estimated prevalence and number of US adults with systolic blood pressure ≥130 mm Hg or diastolic blood pressure ≥80 mm Hg when blood pressure was measured following the NHANES protocol and when it is measured with bias
| US adults not taking antihypertensive medication | US adults taking antihypertensive medication | |||||
|---|---|---|---|---|---|---|
| BP measured following protocol | BP measured following protocol | |||||
| Yes | No – BP measured with bias | Difference (95% CI) | Yes | No – BP measured with bias | Difference (95% CI) | |
| Bias | 5 mm Hg in SBP and 3.5 mm Hg in DBP | 5 mm Hg in SBP and 3.5 mm Hg in DBP | ||||
| NHANES estimate | Higher BP | NHANES estimate | Higher BP | |||
|
Prevalence (95% CI), % |
32.0 (29.6, 34.4) | 44.4 (42.6, 46.2) | 12.4 (10.6, 14.5) | 60.6 (57.2, 63.9) | 71.8 (68.3, 75.0) | 11.2 (9.0, 13.8) |
| N (95% CI), millions | 60.8 (54.6, 61.7) | 84.4 (77.7, 91.1) | 23.6 (19.5, 27.6) | 34.5 (29.8, 39.2) | 40.9 (35.5, 46.3) | 6.4 (4.8, 7.9) |
| NHANES estimate | Lower BP | NHANES estimate | Lower BP | |||
|
Prevalence (95% CI), % |
32.0 (29.6, 34.4) | 21.9 (19.5, 24.4) | ‐10.1 (‐11.4, ‐8.9) | 60.6 (57.2, 63.9) | 48.4 (44.6, 52.2) | ‐12.2 (‐15.1, ‐9.8) |
| N (95% CI), millions | 60.8 (54.6, 61.7) | 41.6 (35.9, 47.3) | ‐19.2 (‐21.7, ‐16.7) | 34.5 (29.8, 39.2) | 27.6 (23.5, 31.6) | ‐6.9 (‐8.7, ‐5.2) |
| Bias | 10 mm Hg in SBP and 7 mm Hg in DBP | 10 mm Hg in SBP and 7 mm Hg in DBP | ||||
| NHANES estimate | Higher BP | NHANES estimate | Higher BP | |||
|
Prevalence (95% CI), % |
32.0 (29.6, 34.4) | 61.0 (59.0, 62.9) | 29.0 (26.7, 31.4) | 60.6 (57.2, 63.9) | 82.7 (79.4, 85.6) | 22.1 (19.3, 25.2) |
| N (95% CI), millions | 60.8 (54.6, 61.7) | 116.0 (105.5, 126.5) | 55.2 (48.2, 62.2) | 34.5 (29.8, 39.2) | 47.1 (40.6, 53.6) | 12.6 (10.0, 15.2) |
| NHANES estimate | Lower BP | NHANES estimate | Lower BP | |||
|
Prevalence (95% CI), % |
32.0 (29.6, 34.4) | 15.4 (13.4, 17.6) | ‐16.6 (‐18.7, ‐14.6) | 60.6 (57.2, 63.9) | 38.3 (35.2, 41.5) | ‐22.3 (‐24.5, ‐20.2) |
| N (95% CI), millions | 60.8 (54.6, 61.7) | 29.3 (25.1, 33.5) | ‐31.5 (‐36.3, ‐26.7) | 34.5 (29.8, 39.2) | 21.8 (18.7, 24.9) | ‐12.7 (‐14.8, ‐10.6) |
Abbreviations: CI, Confidence interval; BP, Blood pressure; NHANES, National Health and Nutrition Examination Survey; SBP, Systolic blood pressure; DBP, Diastolic blood pressure.