High BP in Kids May Be Less Common Than Thought
All in all, just 0.3 percent of the whole study group had confirmed high blood pressure, the researchers found.
Both Lo and Daniels said the findings underscore the importance of doing repeat measurements to confirm that a child actually has high blood pressure, and not just a temporary spike.
To nail down the true prevalence of high blood pressure, Daniels said researchers need to follow a nationally representative sample of children who have three consecutive blood pressure readings taken over time.
But whatever the true rate is, no one is calling for a change in children's routine care.
High blood pressure may not be highly common in children -- which is "good news," Daniels said. But kids with high blood pressure often become adults with the condition. If not treated properly, high blood pressure can lead to coronary heart disease, heart failure, stroke, kidney failure and other health problems.
"Blood pressure tracks from childhood to adulthood," Lo said. "So diagnosing hypertension in a child suggests it will also be present in adulthood, although this is not 100 percent predictable."
High blood pressure is diagnosed differently in children than in adults. There is no cut-off number, which in adults is a reading of 140/90 mm Hg or higher. Children are diagnosed with the condition if they have three consecutive readings that are at or above the 95th percentile for their age, sex and height.
Treatment depends on the cause, if it's known. If blood pressure is very high, Daniels noted, it is likely due to an underlying condition, like kidney disease. Otherwise, a child's numbers can often be reined in with a healthy diet, exercise and, if needed, weight loss.
Learn more about high blood pressure in children from the American Heart Association.