A classification of BP that is based on these ambulatory BP results has been proposed.S10.3.2-5,S10.3.2-6 A new pediatric BP guideline was published in late 2017.S10.3.2-7 11. Other Considerations 11.1. Resistant Hypertension The diagnosis of resistant hypertension is made when a patient takes 3 antihypertensive medications with complementary mechanisms of action (a diuretic should be 1 component) but does not achieve control or when BP control is achieved but On the basis of the previous cutoff of 140/90 mm Hg, the prevalence of resistant hyperten- sion is approximately 13% in the adult population.S11.1-2,S11.1-3 Multiple single-cohort studies have indicated that common risk factors for resistant hypertension include older age, obesity, CKD, black race, and DM. Estimates suggest the prevalence would be about 4% higher with the newly recommended con- trol target of <130/80 mm Hg (subject to validation in future study). The prognosis of resistant hypertension (by the previ- compared with the prognosis of those who more readily achieve control, has not been fully ascertained; however, risk of MI, stroke, ESRD, and death in adults with resistant hypertension and CHD may be 2- to 6-fold higher than in hypertensive adults without resistant hypertension.S11.1-4 S11.1-6 The evaluation of resistant hypertension involves consideration of many patient characteristics, pseudoresistance (BP technique, white coat hypertension, and medication compliance), and screen- ing for secondary causes of hypertension (Figure 10; Section 5.4; Table 13). 