Prevalence of hypertension, isolated systolic hypertension, and systolic‐diastolic hypertension among US adults 80 years and older in 1988–1994, 1999–2004, and 2005–2010. Hypertension: Systolic blood pressure >140 mm Hg and/or diastolic blood pressure >90 mm Hg, and/or self‐reported use of antihypertensive medication. Isolated Systolic Hypertension: Systolic blood pressure >140 mm Hg and diastolic blood pressure <90 mm Hg. Systolic Diastolic Hypertension: Systolic blood pressure >140 mm Hg and diastolic blood pressure >90 mm Hg. Note: Too few participants had isolated diastolic hypertension (systolic blood pressure <140 mm Hg and diastolic blood pressure >90 mm Hg) to produce stable prevalence estimates. *Among those with hypertension.