Accuracy of self-reported hypertension in Brazilian adolescents: Analysis of the Study of Cardiovascular Risk in Adolescents.

Given the high prevalence of hypertension in adolescents, it is important to investigate alternatives for estimating the magnitude of the disease. Our objective was to investigate the accuracy of self-reported hypertension. The study assessed participants of the Study of Cardiovascular Risk in Adolescents (ERICA). The following were calculated: sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV). The associations between inaccurate self-reporting and socioeconomic factors were investigated. The accuracy of self-reported hypertension had a sensitivity of 7.5% (95% CI, 6.9-8.2), a specificity of 96.6% (95% CI, 96.5-96.7), a PPV of 18.9% (95% CI, 17.4-20.5), and a NPV of 90.8% (95% CI, 90.6-91.0). The prevalence of inaccurate self-reported hypertension was smaller among girls (PR 0.68; 95% CI, 0.55-0.83) and younger boys (PR 0.68; 95% CI, 0.54-0.86) who were attending private schools. The use of self-reported hypertension was not a good strategy for investigating the hypertension in adolescents.