Fig. 6From: National trends of pre-hypertension and hypertension among Iranian adolescents across urban and rural areas (2007–2011)a Gender/area-specific trend for unadjusted prevalence of pre-hypertension in Iranian adolescents, aged 15–19 years based on AHA guideline: SuRFNCD 2007–2011. P-interaction for girls/area = 0.39 and for boys/area = 0.26. b Gender/area-specific trend for unadjusted prevalence of hypertension in Iranian adolescents, aged 15–19 years, based on AHA guideline: SuRFNCD 2007–2011. P-interaction for girls-area = 0.99 and for boys-area = 0.49. Error bars show standard errors of marginal effectsBack to article page