Key result
An automatic oscillometric device demonstrated low measurement bias for systolic blood pressure in children (mean difference 1.4 mmHg; 95% LOA -9.9 to 12.8) compared to a mercury column.
Why the study?
Does an automatic oscillometric device accurately measure blood pressure compared to a mercury column in South American children and adolescents?
Observational (n=318)
Does an automatic oscillometric device accurately measure blood pressure compared to a mercury column in South American children and adolescents?
Mean Difference: 1.4 (95% CI -9.9–12.8)
Device shows acceptable bias yet low sensitivity for pediatric hypertension; leaves open routine use pending targeted validation.
OBJECTIVE: This study aimed to test the validity of an automatic oscillometric device to measure the blood pressure (BP) in children (n = 191) and adolescents (n = 127) aged 3 to 18 years. METHODS: Systolic BP (SBP) and diastolic BP (DBP) levels were measured simultaneous by automatic device and mercury column with Y-connection. To verify the validity, Bland-Altman plots and limits of agreement of 95% (95% LOA), specificity and sensitivity of the device, and the grade of British Hypertension Society (BHS) criteria were used. RESULTS: The monitor measurements demonstrated lower measurement bias (mean difference [95% LOA]): 1.4 (-9.9 to 12.8) mmHg in children and 4.3 (-7.8 to 16.5) mmHg in adolescents for SBP. For DBP, it was 2.2 (-7.4 to 11.7) mmHg in children and 1.4 (-8.4 to 11.1) mmHg in adolescents. The sensitivity in children was 21.4 (95% CI = 16.3-26.6), and in adolescents, it was 20.0 (95% CI = 13.2-26.8); the specificity was 95.9 (95% CI = 93.4-98.4) in children and 100.0 (95% CI = 100.0-100.0) in adolescents. The monitor-tested ratings are Grade B for SBP in children and SBP and DBP in adolescents and Grade C for DBP in children. CONCLUSIONS: The automatic monitor presented high values of specificity and lower values of sensitivity to the diagnosis of HBP; however, it can be considered accurate (lower measurement bias) and valid for epidemiological and clinical practice in accordance with BHS criteria.
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Araújo‐Moura et al. (2018) conducted an observational in Blood pressure measurement (n=318). Automatic oscillometric device vs. Mercury column with Y-connection was evaluated on Measurement bias (mean difference) for systolic blood pressure in children (MD 1.4, 95% CI -9.9 to 12.8). An automatic oscillometric device demonstrated low measurement bias for systolic blood pressure in children (mean difference 1.4 mmHg; 95% LOA -9.9 to 12.8) compared to a mercury column.
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