Fig. 4From: National trends of pre-hypertension and hypertension among Iranian adolescents across urban and rural areas (2007–2011)a Gender/area-specific trend of systolic blood pressure (SBP) in adolescents aged 15–19 years: SuRFNCD 2007–2011. b Gender/area-specific trend of diastolic blood pressure (DBP) in adolescents aged 15–19 years: SuRFNCD 2007–2011. Error bars show standard errors of meanBack to article page