The diagnosis of hypertension in children should be based on three blood pressure measurements at separate clinical visits. Normative BP percentiles are based upon data on gender age height and blood pressure measurements from the National Health and Nutrition Examination Survey and other population based studies. In a study initial BP measurement was normal below the 90th percentile pre hypertensive systolic or diastolic BP between the 90th or 95th percentile and hypertensive systolic or diastolic BP 8805 95th percentile in 82 13 and 5 percent of children. At follow up subsequent hypertensive measurements were observed in only 4 percent of the 10 848 children who had initial hypertensive values. In the cohort the overall prevalence of hypertension was 0.3 percent. Source Lo JC Sinaiko A Chandra M et al. Prehypertension and hypertension in community based pediatric practice. Pediatrics 2013 131 e415.