Fig. 1From: Prevalence, awareness, treatment, and control of hypertension in Northern China: a cross-sectional studyThe linear trend of SBP and DBP with age in Northern China population of 35–75 years old, by sex. a SBP of male. b SBP of female. c DBP of male. d DBP of female. SBP Systolic blood pressure, DBP diastolic blood pressureBack to article page