RESUMO
This retrospective study aimed to assess the value of 24-hour ambulatory blood pressure monitoring (ABPM) in distinguishing primary from secondary hypertension in pediatric patients. Our study was conducted on 293 patients referred to a pediatric nephrology clinic over 11 years. Various ABPM parameters were analyzed, including daytime and nighttime systolic and diastolic blood pressures, heart rate, and blood pressure load. Among the participants, 74% were normotensive (white-coat hypertension), 21.5% had primary hypertension, and 4.4% had secondary hypertension. There were no significant differences in the analyzed variables between primary and secondary hypertension groups. Our findings suggest that ABPM might not reliably differentiate between the two in this cohort. As white-coat hypertension becomes more prevalent, ABPM remains a valuable tool in preventing unnecessary workups in children without sustained hypertension. However, our study did not identify specific endpoints for distinguishing primary from secondary hypertension.