Methodological insights and correlations of short-term BP variability indices.
Sandra C Fuchs, Guilherme S Procianoy, Marcelo B Lucca et al.
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In 30 seconds
This analysis examined how four indices of short-term systolic blood pressure variability relate to one another in 65 hypertensive participants aged ≥40 years with obstructive sleep apnoea, using baseline 24-hour ambulatory blood pressure monitoring data from a randomised controlled trial. SD, CV, and ARV were highly linearly correlated, with moderate-to-high consistency across these measures. TRI correlated weakly with the other indices and showed no consistency with them. The findings suggest SD, CV, and ARV may be interchangeable in short-term BPV research, whereas TRI represents a distinct measure.
Key findings
- Among 65 participants, SD, CV, and ARV showed high linear correlations and moderate-to-high consistency.
- TRI had weak correlations and no consistency with SD, CV, or ARV.
Why it matters
Short-term BPV studies may reach different conclusions depending on how variability is measured. The observed agreement among SD, CV, and ARV supports their potential interchangeability in research, while TRI may capture a different feature of blood pressure change. Distinguishing these measures is relevant when interpreting studies of BPV and cardiovascular outcomes.
What to keep in mind
The analysis used baseline data from 65 participants with hypertension and obstructive sleep apnoea; the abstract reports correlations and consistency, not prognostic outcomes.